68 Mr, W. E. Collinge on the Anatomy of 
in the pedal muscles is a spongy mass about 4 millim. in 
leneth (Pi. 1. fie. 12). 
The Generative Organs (PI. I. figs. 8,9, and 14-16).— 
As already pointed out, the generative orifices are really 
distinct and lie about 1 millim. apart and 11 millim. from the 
right upper tentacle (PI. I. figs. 1, 8, and 9). The female 
orifice is surrounded by a prominent white lip, the dorsal and 
anterior portion of which is produced as a thin fold forward, 
and forms the dorsal boundary of the male generative orifice 
(Pl. I. figs. 8, 9). This latter leads into a long narrow 
tube—the penis. At its commencement the inner walls are 
plicated; passing backward there is a thickened muscular 
ridge on the ventral side, which is covered with a series of 
fleshy tooth-like projections (Pl. I. fig. 16). On careful 
dissection the penis is found to be folded upon itself, the distal 
limb scarcely being distinguishable until separated by dissec- 
tion. Passing forward almost as far as the external orifice, 
it again makes a bend and becomes slightly larger, almost 
sac-like, the internal wall again showing plications in this 
region. From the distal end of this sac-like portion the vas 
deferens arises as a fine densely convoluted tube (Pl. I. 
fig. 14, v.d.) which joins the prostatic portion of the common 
duct. ‘There is a short retractor muscle attached to the end 
of the first bend of the penis (Pl. I. fig. 14, 7.m.). The 
female generative orifice leads into a short wide cavity —the 
vagina,—into the upper portion of which the receptaculum 
seminis and free oviduct open. The receptaculum seminis is 
sessile, consisting of a long tube-like diverticulum; at its 
distal end a small retractor muscle is inserted. internally 
the wall is thrown into a series of wavy folds. ‘The free 
oviduct is short. Internally its walls show a series of projec- 
tions which branch and anastomose (Pl. I. fig. 15). ‘The 
common duct is folded from right to left and showed no 
variation from that figured in any of the three dissections. 
There is a large albumen gland. ‘The hermaphrodite gland 
had been broken away in the missing portions of the liver Xe. ; 
the duct, however, remained as a fine and densely convoluted 
tuve (Pl. I. fig. 14, h.d.). 
PARYPHANTA, Albers. 
Paryphanta Hochstetteri, Pir. (Pl. II. figs. 17-21.) 
The anatomy of this species was described by Lieut.-Col. 
Godwin-Austen in 1893. I dissected three of the specimens 
sent to me by Mr. Suter, but found considerable differences 
in the male generative organs from those described and figured 
