1916.] H. H. Godwin- Austen : Moilusca, VI. 551 



whorls i^, the first small, then rapidly increasing. Major diame- 

 ter 8'5, minor 6 mm. 



Only one specimen (No. 5868) found, with other species under 

 stones. The shell recalls A. rotunda from Cachar but is much 

 smaller and rounder. The colouration of the animal of this 

 species is very similar to that of Girasia cacharica, G. A. {Moll. 

 Ind., vol. i, p. 240, pi. lix, fig. 4), but the shell is very different. 



The animal is about 25 mm. long in spirit, very pale grey 

 distantly and strongly spotted throughout, except on the head 

 which is dark in colour. Sole of foot very pale and very indis- 

 tinctly divided ; the extremity square, mucous slit linear with a 

 painted lobe above it. The right shell lobe oval, covering the 

 apex of the shell, an indistinct cicatrix between it and the left 

 shell lobe, which overlaps the edge of the shell considerably leav- 

 ing a good deal of the surface uncovered. In life it would 

 probably cover it entirely. 



Although a single specimen I had to remove the shell in order 

 to figure it and then extract the buccal mass and generative 

 organs. The visceral sac terminates in a complete whorl filling 

 the apex of the shell. The genitalia were scarcely developed. 

 The amatorial organ was seen. 



The radula has well pointed centre and admedian teeth, 

 marginals unevenly bicuspid; the outermost are minute. The 

 formula 40.3.13. 1. 13. 3. 40 or 56.1.56. 



Genus Girasia, Gray. 



Girasia maculosa, n. sp. 



(Plate xlvi, figs, i, la). 



Locality. — Diyung Valley, Singpho Hills (M. T. Ogle). 



A comparison of this animal (figs, i, la), of which two speci- 

 mens were secured, with G. hookeri of about the same size from 

 Cachar, shows it to be distinct, although the differences are 

 superficial, such as the mottling, the peripodial margin and 

 grooves, papillation of the surface and the segmentation of the 

 sole of the foot, this last is much stronger and very close together 

 in the Diyung valley specimens. 



The larger animal measures 50 mm. in length, the smaller 

 25 mm. ; in colour it is ochraceous with close dusky spots on the 

 side of the foot with larger spots on the mantle. 



The shell removed from the smaller animal is very rudimen- 

 tary, a mere epidermis, ruddy ochraceous in colour, covering a 

 thin brittle calcareous layer which broke up on handling. Major 

 diam. 14, breadth 5 mm., elongately oval, very thin on the outer 

 margin. It has no defined apex and in this respect it differs from 

 Girasia hookeri, as well as in not being so elongate and narrow. 

 Differences sufficient even in the shell to constitute it a good 

 species. The visceral sac shows no sign of a coil. 



