TL;DR: The following pages are the result of studies and collections made in the field during a residence of nearly 30 years in southern Florida and of six visits to Cuba which permitted me to work over the island from Cape San Antonio at the west end to within a hundred miles of Cape Maisi at its eastern point.
Abstract: The following pages are the result of studies and collections made in the field during a residence of nearly 30 years in southern Florida and of six visits to Cuba which permitted me to work over the island from Cape San Antonio at the west end to within a hundred miles of Cape Maisi at its eastern point. I have also visited Haiti and collected Liguus virgineus in considerable quantity. This work on the islands was not at all thorough as it was done in connection with that of getting plants and collecting the land snail fauna in general, but it gave me a considerable amount of Liguus material and ideas of its distribution. I have made a rather careful search in Florida, having tramped the East Coast Railroad several times from Key Largo where it enters the Upper Keys to Key West at its terminus and back again. I have visited practically every one of these islands which have ever had Liguus and made collections on them. On the mainland I have been in nearly every locality in which these snails were found, and many of these places I have visited and worked over a number of times. In all I have some kind of Liguus material from over 300 Floridian localities, most of which I have personally collected. For nearly 26 years I have had an opportunity to study these snails in my own hammock within a hundred feet of my door. Long before I began to collect (1882) man had wrought great destruction to the hammocks in which they live so that certain forms were on the verge of extinction and in some localities all evidence of them was obliterated, and at present the Liguus are almost exterminated in Florida. Great areas of forest have been recently cut
TL;DR: Richard Deckert (born in Germany in 1878, immigrated to New York in 1887, died in Florida in 1971) was a polymath with great enthusiasm and wide ranging interests in natural history.
Abstract: Richard Deckert (born in Germany in 1878, immigrated to New York in 1887, died in Florida in 1971) was a polymath with great enthusiasm and wide ranging interests in natural history. His collections and publications did much to document the reptiles, amphibians, and land snails of Florida. His contributions to natural history illustration were equally important, as his carefully detailed line drawings and water colour paintings delineated the intricate details of snails, fishes, amphibians, and reptiles (particularly snakes and turtles), as well as fossil vertebrates, and were used in a wide range of systematic publications. Deckert also contributed to the modernization of fish taxidermy, leading to the current methods for creating lifelike fish mounts. This paper documents his scientific and artistic work.
TL;DR: The first book illustrating a Neotropical land shell appeared in 1684, with a figure of Liguus virgineus (Linnaeus 1758) as mentioned in this paper.
Abstract: The first book illustrating a Neotropical land shell appeared in 1684, with a figure of Liguus virgineus (Linnaeus 1758). An iconography for this genus is presented, describing early pre- and post-Lin
TL;DR: It is concluded that Euglandina and P. manokwari are not effective biocontrol agents, but do have major negative effects on native snail faunas.
Abstract: Since 1955 snails of the Euglandina rosea species complex and Platydemus manokwari flatworms were widely introduced in attempted biological control of giant African snails (Lissachatina fulica) but have been implicated in the mass extinction of Pacific island snails. We review the histories of the 60 introductions and their impacts on L. fulica and native snails. Since 1993 there have been unofficial releases of Euglandina within island groups. Only three official P. manokwari releases took place, but new populations are being recorded at an increasing rate, probably because of accidental introduction. Claims that these predators controlled L. fulica cannot be substantiated; in some cases pest snail declines coincided with predator arrival but concomitant declines occurred elsewhere in the absence of the predator and the declines in some cases were only temporary. In the Hawaiian Islands, although there had been some earlier declines of native snails, the Euglandina impacts on native snails are clear with rapid decline of many endemic Hawaiian Achatinellinae following predator arrival. In the Society Islands, Partulidae tree snail populations remained stable until Euglandina introduction, when declines were extremely rapid with an exact correspondence between predator arrival and tree snail decline. Platydemus manokwari invasion coincides with native snail declines on some islands, notably the Ogasawara Islands of Japan, and its invasion of Florida has led to mass mortality of Liguus spp. tree snails. We conclude that Euglandina and P. manokwari are not effective biocontrol agents, but do have major negative effects on native snail faunas. These predatory snails and flatworms are generalist predators and as such are not suitable for biological control.