190 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



a conchologist, could not stand in the same genus with such forms as 

 Ariophanta Icevipes and Nilgiria solata. To this subgenus I give the 

 name Indrella, from Indra of the Hindoo Pantheon. 



EXPLANATION OF PLATE XVIII. 



Fig. 1. Animal, viewed from the right side. 



,, la. Animal, viewed from above, showing the dorsal lobes and mantle margin. 



,, 2. Internal anatomy in natural position, seen from above. A. anterior, 



P. posterior ends of central axis of body. 



,, 2a. The same, viewed from the right side. 



,, 2b. The same, viewed from the left side. 



,, 2c. The same, viewed from the front. 



,, 3. Generative organs detached and separated out. 



,, 3a. The male organ from the opposite side. 



,, 4. Buccal mass. 



,, 5. Jaw. 



,, 6. Teeth of the radula- — rhachidian and first admedian on either side. 



,, 6a. central teeth, less highly magnified. 



,, Qb. 44th to 48th lateral teeth. 



,, 6c. 132nd to 136th lateral teeth. 



• am. or. amatorial organ. 



ant. l.d.l. anterior left dorsal lobe. 



c.r.p. csecum of the penis and retractor muscle. 



gen. ap. generative aperture. 



k. kalk-sac. 



ot. ovitheca (supposed). 



cesoph. oesophagus. 



or. oviduct. 



Let. left eye tentacle. 



m. retractor muscle. 



m.l.e.t. retractor muscle left eye tentacle. 



post, l.d.l. posterior left dorsal lobe. 



sal. gld. salivary gland. 



sp. spermatheca. 



sper. spermatophore. 



r.m. retractor muscle. 



r.m.p. retractor muscle of penis. 



r.e.t. right eye tentacle. 



('.</. vas-deferens. 



