MACROCHLAMYS. 101 



(Kacliin) Hills, Upper Burma. Nevill (/. c.) adds Cachar, Tezpur, 

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



Animal black throughout. Kight shell-lobe well developed, 

 left shell-lobe overlapping the edge of the ]ieristome, but wanting 

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

 ])ortious, right simple. Generative organs as in M. indica ; 

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

 15 . ] .15.3. 35 (53 . 1 . 53). Similar in form to those of 

 J/, indica, but the broad inner laterals or admedians more 

 numerous, there being altogether 31 broad teeth in the middle 

 instead of J 9. 



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

 refei-red to this sjiecies are longitudinally striated. The identifica- 

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

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



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

 particularly in the generative organs, and resple miens has been 

 placed in another genus.] 



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

 188-">, p. 1U», pi. 29, tii^s. 1-7 (slieil, -i vars., and auatomy). 

 [Vide tig. ^t-'jB, IK lOo.]' 



Shell perforate, subconoidly depressed, rather solid, regularly 

 minutely and lirately scul[)tured longitudinally inider 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 ben(>ath ; aperture subvertical, broadly 

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

 tance within the lip, columellar margiii oblique, briefly expanded 

 and rather broadly reflected abo\e, covering the perforation in 

 part. 



Major diam. 15;!, min. 14;^, height 74 ram. A smaller specimen 

 measures 134 X 1-X 7. Specimens from Manipur Hills measure 

 184x154. 



JIab. Burrail llange, Assam. Asalu, Hengdan and Japvo 

 Peaks; Naga and Manipur Hills {Godivin-Austea). 



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 

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

 attached. The ca?cum is not coiled as in typical forms of Macro- 

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

 rounded end. The spermatheca is long and the free end broader 

 and ovate as usual. 



The radula contains about '62 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 

 Anojyhanta or Ox'ijtes. The jaw also is far straighter than usual. 



