232 



AMPHIBULIMA. 



Shell depressed, somewhat squarish oval, green, but slightly calci- 

 fied, the cavity open beneath. Whorls not quite 2, the small spire 

 lying on the right side rather far posteriorly. Length 18, breadth 

 10, height 5 mill. 



Brazil (Tauntiy); Tijura, near Rio de Janeiro (von Ihering), on 

 a banana. 



Parmacella palliolum FERUSSAC, Prodr., Tabl. Syst. cle la famille 

 des Limaces p. 25 (1821); Histoire, pi. 7 A, f. 1-9. Peltella pallio- 

 lum VON IHERING, Malak. Blatter (n. F.), viii, p. 57-81, pi. 3, 4 

 (anatomy); x, p. 168; Descripcoa e anatomia da Peltella, in Archi- 

 ves do Museu Nacional do Rio .de Janeiro, viii, 1892, pp. 135-153, 

 pi. 7, 8. 



The open spiral of the shell is similar to those of Crypto straJcon 

 and Gaotis. The species io known from the original account by 

 Ferussac, and an excellent anatomical description by Dr. H. von 

 Ihering. 



Genus CRYPTOSTRAKON W. G. Binney, 1879. 



Gryptostrakon W. G. B., Annals of the New York Acad. of Sci., 

 i, p. 258 ; iii, p. 104. Type G. gabU W. G. B. 



Cryptostracon FISCHER, Manuel, p. 469. TRYON, Man. of Conch. 

 (2), i, pp. 233, 249. 



See Tryon, Manual of Conchology, i, p. 249. 



In this slug the shell agrees with Peltella and Gaotis. It is said 

 to be wholly enclosed, but this may possibly be erroneous. The jaw 

 is described as solid with a few stout ribs ; and the radula is de- 

 cidedly of Helicid type, being that of a ground snail. There is thus 

 no question that Cryptostrakon differs generically from Peltella and 

 Gceotis, and t'he probabilities are that it groups with Xanthonyx 

 (Fischer and Crosse) and Metastracon (Pilsbry, 1899), rather than 

 with the preceding Bulimulid genera. This can only be determined 

 by an examination of the genitalia. 



Genus AMPHIBULIMA Lamarck, 1805. 



Amphibulima LAM., Annales du* Museum d'Histoire Naturelle, vi, 

 p. 304 (for A. cucullata, A. succinea, A. oblonga) BECK, Index 

 Moll. p. 98 (for A. unguis, gayana, tigrina, patula, rubes cens, macro- 



stoma') GRAY, P. Z. S., 1847, p. 171 (type A. cucullata}. Am- 



phibulina GRAY, Synops. Brit. Mus., 1842, p. 90. Amphibulimns 



