236 F. Stoliczka — Notes on Terrestrial Mollusca. [No. 3, 



The radula has about 75, almost straight, transverse, closely set 

 rows of teeth, there being about 135 teeth in each row, (fig. 5). 

 The median 25* teeth are subequal among themselves, but consider- 

 ably larger than the outer ones, (about 55) on each side. The 

 centre tooth is symmetrical, tricuspid, with the median point most 

 prolonged, the lateral cusps being comparatively small and turned 

 somewhat outwards and inwards ; the following teeth twist more 

 and more outwardly on either side, the large, strongly curved, 

 points becoming always thinner and the outer lateral points slightly 

 larger, until they nearly equal each other in size. At the same 

 time the breadth of the teeth considerably decreases. 



Comilema, n. gen. 

 (Type, Helix attegia, Benson, from Burma.) 



Shell conoidal, thin, consisting of many, usually spirally rilled or 

 striated whorls ; base convex, narroivly or indistinctly umbilicated ; mar- 

 gin of the aperture thin, not expanded ; outer simple. 



Animal narrow, long, (generally equal to twice the greater dia- 

 meter of the shell) ; pedicles long, tentacles much shorter, lateral 

 line distinct, the margin below it smooth ; gland at the end of foot 

 large, superseded by a distinct horn ; sole grooved ; two shell and 

 two dorsal-lobes to the mantle, all of them small and with no sepa- 

 rately produced appendages, but slightly extended on either end ; 

 genital organs with, or without, an amatorial gland ; a single 

 appendage to the penis, produced into the penis retractor ; recep- 

 taculum seminis terminating with a bulging end, attached to the 

 anterior portion of the prostata. Jaw thin, transparent, smooth 

 indistinctly or finely concentrically striated in the middle. Radula 

 large, consisting of numerous (about 100) transverse rows, each 

 with very numerous (300 to above 400) teeth, a few median teeth 

 being conspicuously larger than the laterals which are narrow, 

 pectiniform and very gradually decreasing in width. 



Following E. v. Martens, Mr. W. T. Blanford referred the type 

 species of this genus, with several other allied species, to Albers' 

 Trochomofpha, but I have already (p. 225) noticed, that this name 

 must be retained for an entirely distinct group, the type of which is 

 Tr. planorbis, Lesson. 



* In younger specimens somewhat less. 



