MOLLTJSCA OF INDIA. 115 



Having recently looked at the position of the retractor muscles 

 in Girasia (vide Plate LXXXVIII,), I examined the same in 

 Alariivlla : I found the retractor muscle of the amatorial organ to 

 have its attachment under the posterior margin of the shell-cavitj' ; 

 the similar muscle of the penis is close to where the intestine passes 

 through the diaphragm, that of the buccal mass where the genital 

 organs pass through the same ; thus they are comformable in the two 

 genera. In life the amatorial organ lies on the right side of the 

 animal alongside the capacious spermatheca. There is no doubt 

 MariaMa is the South-Indian representative of Girasia, and may 

 probably, in a far-distant time, have extended through the inter- 

 mediate country. 



Mr. Blanford has sent me the tinted drawing of a slug made by 

 him at Mahableshwar, about 80 miles from Bombay, which I feel 

 sure belongs to the same genus. It is grey in colour and blotched ; 

 the raised narrow ridges are well shown on the mantle. The animal 

 if drawn to scale is 44 mm. in length. If I am right in my identi- 

 fication this carries the range of Maricdla 500 miles further north, 

 and in all probability is another species, which I would distinguish 

 as M. hlanfordi, after its discoverer ; and I trust before long speci- 

 mens may be sent home from this part of Southern India. 



Subgenus Bensonia. 

 (Continued from Vol. I. p. 253.) 



Bensonia jacqtjemonti, ? Ed. v. Martens, var. kurkamensis, G.-A. 

 (Plate XCV. figs. 1-] i.) 



Locality. Kurram Valley, N.W. Frontier (31. T. Ogle). 



Shell (hg. 1 /) depressedly turbinate, perforate, of solid construc- 

 tion ; sculpture irregularly striate with the lines of growth : under 

 high power the surface is smooth ; colour milky white throughout, 

 no band (in a few specimens a very faint band can be seen), polished 

 particularly below ; in a young specimen a decussate surface was 

 visible ; spire flatlj^ conical, in a few (10 per cent.) it Avas much 

 higher, subconic ; apex depressedly conoid (height of spire is very 

 variable) ; suture moderately impressed ; whorls 7, very closely 

 wound at the apex, regularly increasing, the last rounded on the 

 j)eriphery, beneath rather flat, the umbilical area shallow ; aperture 

 horizontally lunate, oblique ; peristome sharp, in old specimens 

 there is a very considerable thickening just inside the edge ; colu- 

 mellar margin very oblique, slightly reflected. 



inni. mm. mm. 



Size : most conic. . m;ij. diam. l!)-0, miu. 17'75 ; alt. axis 9*5 



largest „ 2!)-0, „ 18-0 ; „ 8-5 



average .... „ 17'9, „ 16"5 ; „ 7-5 



