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212 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
irregular folds, having a distinctly granular appearance. The cavity 
of this portion contains a free spongy mass, elongated, somewhat flat, 
and irregular in outline. On its middle longitudinal portion are two 
or three riblets, which branch and anastomose, and from which 
irregular lesser riblets proceed towards the margins. It appears to 
be a peculiar form of spermatophore, and in its sponge-like texture 
differs from any I have hitherto met with. The uterus is finely 
sacculated. There is a large albumen gland (a/g.). The herm- 
aphrodite duct (/.d.) is densely convoluted, and has no indication of 
an appendix. 
From P. Hochstetteri, Pfr., and P. Hdwardi, Suter, it differs in the 
more sac-like termination of the penis and the very distinct form of 
the spermatheca. 
Compared with P. Hochstetteri there does not appear to be any 
appreciable difference in the arrangement of the muscles. In the 
latter species they are readily followed; a portion of the pedal muscles 
proceeds to the anterior limits of the foot, also several strands ter- 
minate in the body-wall beneath the ocular tentacles. The kidney 
is somewhat narrow and crescent-shaped; it is rather less than one- 
third of the length of the pulmonary sac and a little more than twice 
the length of the pericardium. The reflexed portion of the ureter 
forms a wide tube, while the rectal ureter is open as in P. urnula. 
The venation of the pulmonary sac is pigmented and well defined. 
The great pulmonary vein receives numerous branches from the left 
or cardiae side, several of which are comparatively large, and these 
are correspondingly well-marked afferent vessels. On the intestinal 
side the venation is slightly more dense. When compared with Helix 
aspersa the venation is seen to be markedly less dense and also to 
differ in the arrangement of the great branches. 
‘In Rhytida Greenwoodi, Gray, the kidney is tongue-shaped, short, 
and the anterior portion thin as in Paryphanta urnula; it is about 
two-fifths of the length of the pulmonary sac and rather less than 
twice the length of the pericardium. The venation of the pulmonary 
sac, with the exception of the great vein, is very indistinct. 
The genitalia of this species also demand some mention. Collinge 
gave a description of the anatomy in the Annals and Magazine of Natural 
History (ser. vu, vol. vii, Jan. 1901, pp. 66-68, pl. i, figs. 1-16), and 
the writer gave a notice of the species in the Proceedings of this 
Society (vol. iv, pt. 4, March, 1901, pp. 166-168 and 171, pl. xvu, 
figs. 5, 6, 6a, 60). The above quoted descriptions differ in respect 
to the shape of the male organ. Collinge describes it as a long narrow 
tube folded upon itself, the distal limb scarcely distinguishable until 
separated by dissection, and the free terminal portion of the latter 
becoming slightly larger and almost sac-like. In the specimens that 
came under my notice it is much shorter and more sac-lke, the 
distal limb, or what I termed the epiphallus, similarly folded, but 
lacking the terminal enlargement. 
Recently I received several examples from Shannon, Manawatu, 
and Mr. H. Suter has kindly given me others from Taranaki. The 
Shannon specimens agree well with my description and figures, except 
