SOPHINA. 



283 



[Subfamily SOPHININ^E. 



The single genus SopTiina. 



The form of the shell with its more or less developed umbilical 

 keel, together with the very different type of radula, distinguishes 

 it from the preceding subfamilies. 



The animal possesses ample broad right and left shell-lobes, 

 also a very large and entire left dorsal lobe. The radula presents 

 teeth of similar shape throughout the row, pyramidal in shape, 

 sharply pointed, springing from an obtusely rounded basal plate. 

 There are 80-100 teeth in the row.] 



Genus SOPHINA. 



Sophina, Benson, A. M. N. H. (3) iii, 1859, p. 473 ; id. t. *,. (3) v, 

 1860, p. 26 ; id. t. c. (3) xi, 1863, p. 323 ; Stoltczka, J. A. S. B. 1871, 

 2, p. 252; {Godwin-Austen, Mot. 2nd. ii, 1907, p. 221, pi. 115, 

 figs. 5, 5 a (animal), pi. 116, fig. 3 (anatomy)]. 



Type, S. callus, Bs. 

 Range. Tenasserim Provinces. 



Shell uinbilicated, depressed or globosely depressed, thin, horny, 

 generally resembling Macroclilamys except that the columella is 



[Fig. 86. Sophina schistostciis. 



A. Animal viewed from the right and left sides, shell removed to show- 



shell- and dorsal lobes. X V4. 



B. Genitalia. X 1'4. 



C. Jaw, enlarged (after Stoliczka). 



D. Teeth of radula (ditto), 5th?and 14th, lateral view of.] 



