CARACOLLA acutissima, 



Two- Toothed Disk Snail. 



Class Mollusca. Order Phytophages. Swains. 



Generic (?) Character. 



Animal with four tentacular, the lower pair very short ; Shell 

 discoid, greatly depressed ; the spire but slightly raised above 

 the body whorl ; aperture large, oblique, angulated ; the 

 lower portion generally dentated ; the margin thickened and 

 reflected. 



Specific Character. 



Shell imperforate, with the spiral whorls flattened obliquely, the 

 body ichor I acutely carinated, and convex beneath : outer lip 

 reflected; with from 1 to2 tuberculated teeth near the extremity. 



Caracolla acutissima. Lam. Syst. 6. p. 2. p. 95. Knorr. vol. 4 



pi. 5. /. 2. 3. 

 Encycl, Meth. pi. 462. /. 1. a.b.P 

 Helicodonta. A. de Ferrusac. pi. 58. f. 2. 

 Helix caracolla. Gucrin. Iconog. du R e g. A mm. Mol. pi. o. f. I. 



It is seldom we can deliniate more than the covering 

 of testations animals, particularly where the species are 

 natives of tropical countries. In the present instance 

 we owe this power to the singular fact of this snail having 

 survived a voyage from Jamaica, and peered out upon 

 an English sun. It is now near forty years ago since 

 an intelligent correspondent of our honoured father sent 

 him from Jamaica, a box of land shells : they were care- 

 fully packed in moist decayed wood, and enclosed the 

 living animals. The season was summer and the voyage 

 short ; the box was immediately opened, and by placing 

 the shells in luke-warm water, the animals of every one 

 slowly emerged from their shells. Of their ultimate fate 

 we know not : but that celebrated artist and entomologist, 

 the late Mr. Lewin, then a guest in the house, executed 

 highly finished drawings upon vellum of each species ; 

 and from one of these our present figures are faithfully 

 copied. At the request of our friend Dr. Leach, a copy 

 was also made by some one and transmitted to Baron de 

 Ferussac, for his great work upon Land shell, where 

 it will be found engraved at pi. 58. fig. 2. M. Guerin has 

 re-copied this latter figure, but as both are inaccurate, 

 without any fault of these gentlemen, (who never saw 

 the original drawing of Lewin) we have now represented 

 it correctly. 



96. 



