286 SIR C. ELIOT AND T. J. EVANS. 
longations of the blood lacune of the foot. The kidney 
(fig. 10, e) also sends prolongations into its upper surface. 
It presents a series of lobes the outer layers of which are 
formed by masses of ova (fig. 10, b and c). Within each 
lobe is an ample loculus (fig. 10a), larger than the whole 
mass of ova, containing spermatozoa in all stages of develop- 
V4 | 
Kidney of Doridoeides, seen from the dorsal side (X 22). a. 
Reno-pericardial opening. 4. Gaps for passage of ‘dorso-ventral 
muscles and protruding lobes of hermaphrodite gland. c. Renal 
opening. 
ment. But there is no symmetrical arrangement of ovarian 
follicles round a central male follicle. 
The hermaphrodite duct (fig. 9,b) is thin and short, but 
swells out into an unusually large pear-shaped ampulla 
(fig. 9, c), which again contracts into a thin tube. After a 
short straight course this tube (fig. 9, f) bifurcates. The 
male portion (fig. 9, d) runs forward and describes a com- 
