certain Agnathous Pulmonate Mollusks. 69 
by Godwin-Austen, in consequence of which I decided to 
obtain further material and carefully work through the system 
again, Owing to this the publication of the present paper 
has been somewhat delayed. The later dissections fail to 
verify the above-mentioned account, and I must take excep- 
tion to the comparisons and conclusions the author has drawn 
at the close of his paper. 
On unravelling the terminal ducts of the generative organs 
the penis with its darkly pigmented proximal portion is very 
conspicuous. In life it lies across the buccal mass, the right 
tentacular retractor muscle crossing over it at the proximal 
end (Pl. Il. fig. 17). In the last specimen dissected it 
measured 37 millim, in length. Itis a large muscular organ, 
consisting for the greater part of its length of a simple tube, 
the terminal portion only, to which the retractor muscle is 
attached, being solid. I failed to find any knob-like process 
or nipple-like crenulations, as figured by Godwin-Austen (op. 
ett. pl. i. fig. 12), although the lumen of the tube was care- 
fully traced for 82 millim. The vas deferens is a long fine 
tube closely bound to the sides of the penis for the greater 
portion of its length. Godwin-Austen states (op. ctt. p. 7) 
that ‘‘ the vas deferens is short and unites with it [the penis] 
very low down, not far from the generative aperture.” As 
shown in figure 18 (Pl. Il.) the vas deferens leaves the 
penis towards its distal end, and is closely bound to its wall 
by strands of connective tissue; towards the proximal end of 
the penis it folds itself around that organ, and then passing 
down to the region of the vagina, it runs along its left dorsal 
side as a convoluted tube; at the point where the receptacular 
duct enters the vagina the vas deferens dips beneath the free 
oviduct, reappearing on the right side, still exhibiting convo- 
lutions; it then passes across to the left side, where it 
becomes continuous with the prostatic portion of the common 
duct. In order to verify what I had made out by dissection, 
the penis of a further specimen was taken and sections cut by 
the freezing microtome ; these fully bore out the conclusions 
drawn from the dissections (cf. Pl. IT. tig. 19, x'-x°). 
On the supposition that the vas deferens in this species 
was very short &c., Godwin-Austen proposed to place the 
genera Paryphanta, dilea, and Schizoglossa in a new sub- 
family—Paryphantine : ‘ Schizoglossa bearing the same rela- 
tionship to Paryphanta as Girasia, Gray, does to Mucro- 
chlamys among the Zonitide.” 
The Pedal Gland (Pl. If. figs. 20, 21).—The position 
occupied ig similar to that in Rhytida Greenwoodi. The 
gland measured 17°5 millim. in length; at its posterior end it 
