918 HELIX. 



twer Amh. t. 12. f. 14. Gualter, t. 1. f. R. Seha, iii. 



t. 38. f. 1 to 7. Geve, t. 27. f. 289 and 291. Knorr, 



V. t. 5. f. 2. Martini Berlin. Mag. iii. t. (5. f. 68. Fa- 



vanne, t. 6l. f. D 8. 

 Inhabits Asia. Limmus. Amboyna. Rumphius. Jamaica. 

 Lister. Rivers in St. Domingo and Guadaloupe. Bru- 

 guiere. 

 She'll about two inches long, and the breadth rather less, of a 

 bluish or greyish white colour, with several darker transverse 

 bands, and covered with rather a pale green epidermis ; the 

 body-whirl is ventricose, especially toward the upper end, at 

 , which it becomes more or less flattened ; the spire is com- 

 paratively small, depressed, and consists of five whirls ; the 

 inside is striped with brown ; the umbilicus is small, and 

 nearly covered by the lip, which on that side is reflected. 



URCEUS. 72. Shell ventricose, nearly globular, 

 wrinkled longitudinally, and the spire some- 

 what produced ; aperture ovate-oblong, and 

 the umbilicus large. 



Helix plicata. Portland Cat. p. 18, lot 400, and p. 91, 



lot £027. 

 Helix maxima. Chemnitz, ix. part 2. p. 108. 1. 128. f. 



1136. 

 Helix ampuUacea, Var. /?. Schroeter Einl. ii. p. 143. 



Gmelin, p. 3626. 

 Nerita Urceus. Muller Verm. ii. p. 174. Schroeter Fluss. 



p. 253. 

 Bulimus Urceus. Bruguiere Enc. Meth. p. 298. 

 AmpuUaria rugosa. Lamarck Si/st. des j4nim. p. 93. 

 Lister Conch, t. 125. f. 25. Favanne, t. 6l. f. D 10. 



Inhabits the Indian Islands. Muller. River Mississippi. 

 D'Jlvila. Barbadoes. Humphreys. 



Shell four or five inches long, and almost equally broad, thick, 

 and of a whitish colour covered with a dark brown epider- 

 mis ; the body-whirl is strongly wrinkled or somewhat plaited 

 longitudinally, and the spire is more produced, and the um- 

 bilicus much larger than in H. ampuUacea ; the inside is 

 white. It is generally known by the name of the Cocoa Nut 

 Snail. 



GLAUCA. 75. Shell ventricose, with the spire de- 

 pressed, and the summit pointed; aperture 

 effuse, with the inside orange, and the um- 

 bilicus very large. 



