PACE: ANATOMY OF VOLUTA MUSICA, LINN., ETC. 29 
grooved condition of the central cusp, not indicated by Gray or 
Troschel (12), should be noted. As mounted by Dr. Gray the radula 
consisted of 26 teeth. 
Amorra Turnert, Gray. 
Radula.—The original preparation figured by Dr. Gray (6; p. 133, 
fig. 5) as the radula of this species. shows, as I had surmised, that his 
figure does not well interpret the structure of the tooth. I have 
therefore refigured it (Fig. 11). It will be seen that there is, after 
all, nothing so very peculiar about the radula of A. Zurnerv; and 
that it differs from that of V. vespertilio only in haying the base of 
the tooth even more arched than it is in the latter form, and in the 
complete suppression of its lateral cusps with accompanying greater 
development of the central cusp. 
Voturomitra GREENLANDICA, Beck. 
Radula.—Martin F. Woodward (18) and others have assumed that 
the figure given by Troschel (12; pl. v, fig. 5b) represented a normal, 
triserial radula. This figure, however, in reality demonstrates the 
effect of pressure upon the cover-glass ; for the apparent lateral teeth 
are in reality but the broken-off bases of the highly arched rhachidian 
tooth, which appears to be alone present. This tooth would seem to be 
in every respect comparable with that of Amoria Turnerv.* 
Hazia Priamus, Meusch. 
There now seems to be no reasonable doubt as to the correctness of 
the reference of this form to the Volutide. The published accounts of 
its anatomy are, however, obviously based upon misconceptions as to 
the homologies of the parts; and these inaccuracies have unfortunately 
received the imprimatur of the text-books. 
Alimentary Canal and Leiblein’s Gland.—Fischer (3) regarded the 
convolutions of the cesophageal czecum as being those of the intestine ; 
and both he and Poirier (8) have mistaken for the stomach what is 
without doubt only the enlarged terminal segment of this diverticulum. 
The true stomach is figured -by Poirier (8; pl. ii, fig. 4) occupying its 
normal position, and with the usual relationships; but it is regarded 
by him merely as a bend of the intestine. The condition of Leiblein’s 
gland in this form is generally regarded as quite a peculiar one, Poirier 
having described it as being in open communication with the lumen of 
the alimentary canal, at its enlarged distal end as well as proximally. 
Now, is it not in the highest degree probable that the actual facts of 
the case are, that the terminal enlargement of the cesophageal czecum is 
so closely bound up with the cesophagus, that in the process of dissection 
an apparent second opening into the gut has been artificially formed 
at this point? It is an exceedingly easy matter to fall into error 
regarding the openings of minute ducts ; thus, I was myself very nearly 
1 T had hoped to refigure the radula from Dr. Gray’s preparation, but an examination 
of the slide, a temporary mount, shows that the radula itself has unfortunately 
disappeared. 
