MACJtOCHLAMYS. 101 



(Kachin) Hills, Upper Burma. Nevill (I. c.) adds Cachar, Tezpur, 

 Assam, Teria and Borpani, but these are very doubtful. 



Animal black throughout. Eight shell-lobe well developed, 

 left shell-lobe overlapping the edge of the peristome, but wanting 

 the tongue-shaped process of M. indica. Left dorsal lobe in two 

 portions, right simple. Generative organs as in M. indica 

 spermatheca very long, kale-sac rounded. Teeth of radula 35 . 3 . 

 15.1.15.3.35 (53.1.53). Similar in form to those of 

 M. indica, but the broad inner laterals or admedians more 

 numerous, there being altogether 31 broad teeth in the middle 

 instead of 19. 



In typical shells there is no sculpture, but some small specimens 

 referred to this species are longitudinally striated. The identifica- 

 tion is not certain. Nevill classed this species as a variety of 

 resplendens, which is a much thiuner shell, devoid of labiation. 



[There is also considerable difference in the shell-lobes, and 

 particularly in the generative organs, and resplendens has been 

 placed in another genus.] 



145. Macrochlamys castaneo-labiata, Godwin-Austen, Mol. Ind. i, 



1883, p. 119, pi. 29, figs. 1-7 (shell, 3 vars., and anatomy). 

 [FwZefig. 45 B, p. 105.] 



Shell perforate, subconoidly depressed, rather solid, regularly 

 minutely and lirately sculptured longitudinally under a lens, light 

 brown to pale ochraceous horny ; spire low conoid, suture im- 

 pressed ; whorls 6, convex, the last broader, rounded at the 

 periphery, slightly swollen beneath ; aperture subvertical, broadly 

 lunate; peristome thin, strongly labiate inside, often some dis- 

 tance within the lip, columellar margin oblique, briefly expanded 

 and rather broadly reflected above, covering the perforation in 

 part. 



Major diam. 15|, min. 14|, height 7| mm. A smaller specimen 

 measures 13| x 12x7. Specimens from Manipur Hills measure 

 18|xl5|. 



Hob. Burrail Range, Assam. Asalu, Hengdau and Japvo 

 Peaks; Naga and Manipur Hills (Godwin- Austen). 



In the animal the shell-lobes are very long and some portions 

 of the anatomy are peculiar. The vas deferens leads to a blunt 

 swollen tube representing the kale- sac, and this leads to a thick 

 caecum, to the side of which the retractor muscle of the penis is 

 attached. The caecum is not coiled as in typical forms of Macro- 

 clilamys. The amatorial organ is large and terminates in a blunt 

 rounded end. The spermatheca is long a ad the free end broader 

 and ovate as usual. 



The radula contains about 82 transverse rows of teeth, thus 

 arranged : 45 . 2 . 8 . 1 . 8 . 2 . 45 (55 . 1 . 55). The 17 teeth in 

 the middle are tricuspid and much broader than the others ; the 

 outer laterals are simple elongate teeth, more like those of 

 Ariophanta or Oxytes. The jaw also is far straighter than usual. 



