68 Mr. W. E. Colllnge on the Anatonvj of 



in tlie pedal muscles is a spongy mass about -i millini. in 

 length (PI. I. fig. 12). 



The Generative Organs (PI. I. figs. 8, 9, and l-i-lG). — 

 As already pointed out, the generative orifices are really 

 distinct and lie about 1 niillim. 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 

 (PI. 1. figs. 8, 9). This latter leads into a long narrow 

 tube — the penis. At its commencement the inner walls are 

 plicated ; passing backwaid there is a thickened muscular 

 ridge on the ventral side, which is covered with a series of 

 fleshy tooth-like projections (PI. 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 (PI. I. 

 fig. 14j v.d.) which joins the prostatic portion of the common 

 duct. 'I'here is a short retractor muscle attached to the end 

 of the first bend of the penis (PI. 1. fig. 14, r.yn.). Tlie 

 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 (PI. 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 j)ortions of the liver &c. j 

 the duct, however, remained as a fine and densely convoluted 

 tube (PI. I. fig. 14, h.d.). 



Paryphanta, Albers. 

 Paryphanta Ilochstetteri, Pfr. (PI. 11. figs. 17-21.) 



The anatomy of this species was described by Lieut. -Col. 

 Godwin-Austen in 1893. I dissected tluee of the specimens 

 sent to me by Mr. Suter, but found considerable differences 

 in the male generative organs from those described and figured 



