MACROCHLAMYS. 87 



tougue-like process (the left shell-lobe) is given off laterally. 

 Close to the upper angle of the aperture a well-developed right 

 «hell-lobe is given off horizontally and is often extended for 

 "2 inch or 5 mm,, hut never (ihovc the periphery of the shell. 

 The posterior part of the foot (in this example) was ornamented 

 ivith four diagonal lines, which meet above in an angle ; the 

 general surface rugose ; the peripodial margin broad and de- 

 tined. The mucous gland overhung by a curved lobe. Length : 

 head to shell 0-6 inch, extremity of foot to shell 0-7o : total 

 nearly 2 inches. Eye-tentacles long and slender, O'-l inch. 



The following notes were made when dissecting Dr. Blan- 

 ford's specimen : — Shell : sculpture smooth, with indistinct fine 

 spiral striation. Animal unicolor in spirit ; i)eripodial margin 

 broad. The right shell-lobe is a well-developed tongue-like 

 process ; the left shell-lobe small. The horn above the mucous 

 gland of moderate size, blunt. Generative oi'gans : penis with a 

 rather long kale-sac. The retractor muscle is short and thick, 

 given off from quite a large coiled caecum. The spermatheca is 

 very long. The araatorial organ also very long. The radula was 

 extracted nearly complete : formula : 



33 . 2 . 12 . 1 . 12 . 2 . 33 

 47 . 1 . 47 



The admedian teeth have a single cusp on the outer side, the 

 marginals are unevenly bicuspid, and those on the outside become 

 very minute. 



The jaw has a small central projection.] 



[127. Macrochlamys sequins, Godwin- Audcn, MoJ. Ind. ii, 1907, 

 p. lUS, pi. 100, fi;rs. ■2--2>j. 



Shell differs in its characters from that of J/, seqnax ; it_ is 

 slightly more solid, globose, with more rounded apex, the major 

 axis of the aperiure directed obliquely downward, instead of hori- 

 zontally as in 21. sequax. The sculpture of these Damsang shells 

 is rather coarse, somewhat wavy, longitudinal striation. Colour 

 pale umber-brown. The shell of the specimen dissected had 

 4 whorls and was 11 mm. in major diameter, and therefore not 

 fully grown. 



The largest specimen measures : major diam. 12-25, alt. axis 

 5' 75 mm. 



Locality. Damsang, Daling Hills, W. Bhutan. 



Animal in spirits witli pale foot, black head and tentacles, and 

 a slightly darker tint near the extremity of the foot. The right 

 shell-lobe is rather short and broad; the left shell-lobe small; 

 the left dorsal lobe is in t\\ o ]>arts, one on each side of the left 

 «hell-lobe. 



In the generative organs there is not much difference to be 

 found when they are compared with those of M. sequax. The 

 kale-sac was well developed and shows a spermatophore within it. 



