MOT.LUSCA OF INDIA. 117 



The right neck-lobe is large and simple (fig. 1 d) ; the left is 

 divided into two — one, large, next to the respiratory orifice, then 

 there is a gap, followed bj' another distinct lobe, which has a 

 tongue-like expansion on both sides, and on the anterior side it 

 gradually narrows away to the umbilicus. 



The shell is extremely transparent on the body-whorl, so that the 

 branchial venation is beautifully seen through it. 



The jaw is well arched and has a strong central projection. The 

 central tooth as in typical species ; the laterals, though bicuspid, 

 have the outer cusp below the inner. 



40 . 1 . 18 . 1 . 18 . 1 . 40 

 59 . 1 . 59 



The outermost laterals are very minute in comparison with the 

 central teeth ; they are short and bluntly bicuspid (fig. 1 h), and 

 the odontophore is exactly as in Bensonia lahiata, Pfr. (Plate LXI. 

 figs. 5rt-«"). The resemblance with this species extends to the 

 generative organs : on getting these out, the most striking feature is 

 the pink colour of the spermatheca (fig. If). 



The male organ (fig. 1 e) has a well-developed kalk-sac close to 

 the connection of the vas deferens. The retractor muscle is given off 

 from a closely-wound caocum-like portion of the penis-sheath. The 

 spermatheca is peculiarly long, with a very narroAV duct below, 

 but swelling out above into a large bulbous head. The amatorial 

 organ (fig. 1 g) is large, cylindrical, and bent on itself. It is very 

 muscular, and under transmitted light presents a pale-coloured 

 central mass, pointed at the posterior end, and at the anterior 

 ending in a close spiral with a very fine point. This spiral form 

 is, I imagine, due to longitudinal shrinking, and in life is, in all 

 probability, quite straight. 



Bensonia jacquemonti, ? Ed. v. Martens. 



Bensonia jacquemonti, Clessin, Nomen. Helic. p. 41 ; Tryon, Man. 

 Conch. 2nd ser. vol. ii. p. 108. 



Locality. Kurram Valley {M. T. Ogle). 



Shell very depressedly turbinate, perforate, not fully grown ; 

 sculpture, striate lines of growth, under strong power the general 

 surface is finely decussate, polished below ; colour pale ruddy, with 

 a grey tint, grey and white below, with a pale rufous band just 

 above the periphery ; spire very low, apex very flat ; suture shallow- : 

 whorls 5, the last rounded ; aperture horizontally lunate ; peristome 

 sharp, very slightly reflected at the columellar margin. 



Size: maj. diam. 16-0, min. 13-8; alt. axis 6-5 mm. 



This specimen arrived not long after it had died, and I could make 

 out the raucous pore and pallial line ; mantle-lobes had decayed 

 away. 



