18 ENDODONTID^E. 



front. Aperture nearly vertical, semihmate ; peristome thin, the 

 lower margin slightly, the columellar margin strongly reflected 

 and partly overhanging the narrow perforation.'* (Gude.) 



Diara. 5-25, alt. 4-25 mm. 



Hob. India: Anam allay Hills (JBeddome). 



Five specimens labelled tricarinata, Blanford received by 

 Mr. Ponsonby from the late Col. Beddome, proved upon examina- 

 tion to be quite distinct, and to differ, in fact, from all other 

 known forms. My own collection contains two specimens from 

 the same source. 



Philalanka quinquelirata is much larger than P. tricarinata 

 which measures less than 2 mm. and possesses, moreover, only 

 three revolving lirse, the lowest of which is below the periphery, 

 whereas in the present species it is peripheral. The perforation 

 of P. tricarinata is proportionately wider and the columellar 

 margin is not reflected, while the aperture is higher in proportion 

 to its width than is the case in P. quinquelirata. 



30. Philalanka ? lamcabensis, Jousseaume. 



Plectopylis lamcabensis, Jousseaume, Mem. Soc. Zool. France, vii, 



1894, p. 278, pi. 4, fig. 8. 

 Plectopylis ? lamcabensis, Gude, Science Gossip, N. s. v, 1898, p. 171, 



fig. 91 (copied from Jousseaume). 



" Shell subperforate, trochiform, stout, somewhat thin, striated 

 and surrounded on the last whorl by three thread-like ridges, 



b 

 Fig. 4. Philalanka ? lamcabensis (after Jousseaume). 



diaphanous, shining, corneous white, apex obtuse, suture im- 

 pressed, crenulate ; whorls 7-J-, flattened, the last angulate, not 

 descending; base more convex, radiately striate ; aperture scarcely 

 oblique, subaugulate, lunate; peristome simple, straight, colu- 

 mellar margin sloping, near the umbilicus narrowly dilated. 



" Diam. 4, alt. 3 mill." 



Hob. Ceylon : Nuwara Eliya (Simon). 



Described as a species of Plectopylis, the absence of any 

 mention of internal folds or denticles makes the generic reference 

 extremely questionable. Mr. Sykes doubtfully suggests (Proc. 

 Malac. Soc. London, iii, 1898, p. 71) that it belongs to the genus 

 Sitala ; this I consider improbable. The aspect of the shell, 

 especially the excavated umbilical region, would rather suggest the 

 genus Philalanka. 



