MACROCHLA.MYS. O < 



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

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

 shell-lobe is given off horizontally and is often extended for 

 "2 inch or 5 mm., but never above the periphery of the shell. 

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

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

 general surface rugose ; the peripodial margin broad and de- 

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

 head to shell 0-6 inch, extremity of foot to shell 0-75 : total 

 nearly 2 inches. Eye-tentacles long and slender, 0*4 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 ; peripodial 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 organs : 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 amatorial 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-Austen, Mol. Ind. ii, 1907, 

 p. 168, pi. 100, figs. 2-2 ff . 



Shell differs in its characters from that of M. secjuax it is 

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

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

 zontally as in M. 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. Dainsang, Daling Hills, W. Bhutan. 



Animal in spirits with 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 two parts, one on each side of the left 

 shell-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. 



