596 



Records of the Indian Museum. [Vol. XXII, 



to rounded tubercles. Edge of mantle not extending over the shell. 

 Dorsal surface and sides of the body infuscated, with a pale 

 irregular reticulum. A pale groove extending along the body 

 below each eye-stalk. E\'e-stalk internally black. Foot whitish 

 with a dark reticulum or spots round the upper margin. Edge 

 of mantle with black specks or spots." 



The walls of the mantle are moderately' thick and quite dark 

 owing to a suffusion of black pigment. The mantle edge is thick 

 and muscular. 



The pulmonary opening is situated a little behind the middle 

 of the body, on the right side. It is placed on the edge of the 



U.,y 



Fig. 22. — Succinea deganfior, .'Vnnandale. 



(a) Horizontal longfiludlnal ^^ection of the vesicula semin 



structures. 



(b) Longitudinal section ol the penis-sac. 



a.g. albumen gland ; d.a.g. duct of the albumen gland ; f.p. 

 li.d. hermaphrodite duct; p. penis; p.s. penis sheath; r.mp. 

 penis; lit. uterus: ii.d. vas deferens; v.s. vesiculj seminalis. 



fecundat 

 retractor 



.idjoininy 



on pouch ; 

 muscle of 



mantle and is a circular aperture with prominent edges incomplete 

 below and with a horseshoe-shaped black band outside it. The 

 opening of the ureter is slit-like and lies dorsal to the anus, which 

 jpens obliquely under the mantle edge. 



It will be convenient to describe the genitalia from above 

 downwards. Within the apex of the shell we find firstly the her- 

 maphrodite gland, a yellowish white miss of irregular shape, embed- 

 ded in the liver and occupying the greater part of the spire. The 

 hermaphrodite duct is a long tube, much convoluted and made 

 conspicuous by its dark colouration, which is derived from the 

 superimposed pigmented cells of the connective tissue. At the 

 point at which the duct enters the albumen gland two club-shaped 



