220 SIMPULOPSIS. 



/ 



Simula FISCHER & CKOSSE, Miss. Scient. Mex., Moll., i, p. 578, pi. 

 24, f. 13, 13a. VON MARTENS, Biol. Centr.-Amer., Moll., p. 253. 

 Resembles the Brazilian species in color and form. It is known 

 by the type lot only, one of which has been figured by Fischer and 

 Crosse. 



S. CUMINGI Pfeiffer. PI. 63, figs. 61, 62. 



Shell subglobose, very thin, lightly and irregularly plicatulate, 

 pellucid, slightly shining, greenish-corneous. Spire minute, project- 

 ing as a little papilla. Whorls 3, the last much inflated ; columella 

 regularly arcuate, simple. Aperture oblique, rounded-oval, very 

 glossy inside; peristome simple, a little expanded. Alt. 12, greater 

 diam. 20J, lesser 19 mill. (Pfr.). 



Mexico (Cuming coll.). 



S. cumingi PFR., P. Z. S., 1861, p. 27, pi. 3,f. 2 ; Malak. Blatter, 



1861, p. 84; Monogr. v, p. 22; vii, p. 29 REEVE, Conch. Icon., 



xiii, pi. 1, f. 5 (1862). FISCHER & CROSSE, Miss. Scient. Mex., 

 Moll., p. 580 MARTENS, Biol., p. 253. 



Known by the original description and Reeve's figures, which 

 represent a shell double the size of S. anea, arid distinctly plicatulate. 



Section BULIMULOPSIS Pilsbry, 1899. 



Eudioptus ALBERS, Die Hel., edit. Martens, p. 223, 1861 (type 

 B. pseudosuc cineus Moric.). Not Eudioptis Hiibner, Verzeichniss 

 bekannter Schmetterlinge, 1816. 



Shell smooth, varying from oblong-ovate to globose-conic, imper- 

 forate or very narrowly perforate, thin, brittle, translucent, glossy 

 and unicolored; whorls 4 to 5^, the apical 1^-1^, sculptured with 

 excessively fine, dense, spiral stria?, as in typioal Simpulopsis. Aper- 

 ture ovate, the peristome and columella thin and simple. Type S. 

 pseudosuccinea Moric. 



A Brazilian group of thin, brittle-shelled snails, resembling Sim- 

 pulopsis in their tenuity and simple peristome, but differing in the 

 more Bulimoid form of the shell, which is very smooth and light 

 colored. The soft anatomy is unknown. 



Key to Species. 



a. Length of shell over twice its diameter ; oblong ovate. 



pseudosuccinea, p. 221. 



