1884.] ` Zoölogy., 1273 
morethan a reproductive organ, its walls being almost completely 
occupied by the folds which give rise to the ova. But it is most 
important to observe that a narrow tubular channel runs from it 
Into the kidney sack opening, then by a ciliated mouth and lined 
with ciliated epithelium. 
Grobben in his article states the obvious conclusions that this 
reproductive organ of the cephalopod is the remnant of a body- 
cavity, and that in the vast majority of existing Mollusca we 
_ have, as the sole surviving portion of the primitive body-cavity of 
the usca, the pericardium, the renal organs and the genital 
ands. 
Grobben promises a future paper with the details fully de- 
scribed and figured, upon the subject of this communication. It 
promises to be a most important contribution. 
In the light of these facts it would seem that the separation of 
‘ the Mollusca from the animals with true body-cavity, 
_ by the Hertwigs, is not justified, for though their body cavity 1$ 
_ at present insignificant, it would seem that this is due to the loss 
__ Of the same and an early condition of greater likeness to the en- 
_ teroccels rather than to an essential unlikeness reaching back to 
_ the earliest ancestor. — Henry Leslie Osborn. 
-Norte on rae PeLvis IN BIRDS AND Dinosaurs.—By the papers 
: of Hulke! and Marsh? a new light was given upon the morphol- 
Ogy of the pelvis in birds and dinosaurs. That part in birds pre- 
a viously considered as pubis was now the postacetabular part of 
_ this bone, the real pubis was seen on the “ pectineal apr S 
— (Huxle part of the pubis was cal 
y). This preacetabu lar part O seg This view 
a Seems generally adopted to-day. ; 
I have recently had occasion to examine the pelvis of young 
d that the “ pectineal process 
a part of the 
been discussed by D 4 
ollo. Ngee 
d ollo found correctly that the pectineal 
b he homologizes it with the nom 
believing that this process was formerly distinct. ai. effet, ce vl 
ioe a un organe rudimentaire, sy être ossifiée Par usur, 
| irectement avec l'ilium ” (p- 95)- 
gather he considers the pubis and postpubis of - eee 
; ng originally two distinct dement "H tesa® ip ond 
| pubis et le post-pubis seraien 
os tes. : modified form of 
“ae «& Note on a 4 
2 M. sca; ne e Geol. Soc., Vol. XXXII, pP- a myn 
arsh. O. C. Princ. charac. of Am. Jur. page t ee hes. 1880. 
‘and Arts, Nov., 1878, Jan., 1879. Marsh, 0 - gsgeschichte des Beckengirtels der 
_ Punge, Al. Untersuchung 
Amphibien, Reptilien und Vögel. Dorpat, nsa ns de Bernissart. Bull. du Mus. 
troisième note sur les Di 
