MOLLUSCA or INDIA. 



107 



The virgula amatoria in the centre of the amatorial organ is very 

 short and bhmt (fig. 2 h). The posterior end of the male organ 

 (fig. 2i), where it is hent on itself, is simple and rounded, with no 

 sign of diverticulum or ca?cum-like appendages as is seen in typical 

 Macrochlami/s. 



GiRAsiA sHANENsrs, n. sp. (Plate XCI. figs. 3-3 e.) 



Locality. Shan Hills, east of Fort Stedman {Colonel ]VoodlhQrpc, 

 R.E., C.B.). 



In ' Land and Freshwater Mollusca of India,' Part VI. p. 237, 

 Plate LIX. Vol. I., I figured the shell of Austeniu ? venusfa, Theobald. 

 In 1893 my friend Col. Woodthorpe, when surveying the Burmese- 

 Siam frontier, sent me from the Shan country specimens preserved 

 in spirit of a closely allied species; I thought at first it was the 

 same. Mr. Theobald did not describe the animal ; it was therefore 

 interesting to get this specimen, badly preserved as it was. A 

 closer examination shows that the shell is not altogether the same 

 in the proportion of the apex to the rest of the spatulate body-whorJ. 

 The same differences exist on comparing it with G. pegiiensis. 



Shell (figs, 3, 3rt) flattened above, of oval outline on the periphery ; 

 viewed from below it is scoop-shaped. The apex, consisting of one 

 whorl, is very small, much smaller than in either of the allied forms, 

 G. pexiuensls or G. venusta. Colour strong ochre; surface quite 

 smooth and polished ; grey within. 



Animal (in spirit) (fig, 3 6). Dark grey throughout, the extremity 

 of foot with a long lineal mucous pore : the specimen was badly 

 preserved ; the left shell-lobe was seen to be long and narrow. In 

 figure 3 b the visceral sac and mantle-covering had been destroyed 

 and is left blank, but it shows that the animal is similar in form and 

 proportion to G. jieguensis. 



Odontopliore. The median teeth bicuspid, the outer cusp being 

 far below the apical, as in Austenia gigas, &c. ; the outermost lateral 

 teeth are small and unicnspid. 



The generative organs were not in a state to describe from, but 

 two sperm atophores (fig. 3 e) were perfect and were precisely similar 

 to those of Gimsia, which will be referred to in this Part and 

 compared with those of other genera. 



In the descriptions of the genera Girasia and Avste^iia, which 

 were published in Vol. I. pp. 148 & 226, and following pages 

 respectively, 1 referred to the anatomy of this group of shells as 

 described and figured in the P. Z. S. 1880, p. 289. As this paper 

 had then only recently been published by me, I did not reproduce 

 the plates, but now, in order to bring together in this work all the 

 anatomical details of these genera np to the present examined, I 

 think, for purposes of comparison, it is desirable to do so, and at the 

 same time keep those of the different species separate. In the above 

 paper much confusion may be caused by my having figured together 

 parts of three different specimens, viz. : (1) Austenia gigas from the 



