E. S. Morse—Oviduets of Terebratulina. 263 
ap. J have, however, nearly three hundred outlines of the 
embryos during their development, a few of which are presented 
. this brief communication. Next year it is hoped a com- 
ete history of their development will be made, as many things 
ave been observed in their proper management of which I shall 
profit in my next attempt. 
a. 
gency ing ERhynchonella alive, to note the ciliary action in the 
iducts driving currents outward, and to establish the correct- 
Protruded. A jar of specimens dredged b PEG 
ged by Dr. P. P. Carpenter. 
who kindly accompanied me from Montreal, was left standing 
ae its arms their entire length from the partially opened 
els. I*poured the sea water carefully out, and suddenly 
poured in ¢ ie strongest alcohol, and the specimen is now pre- 
selban in this exerted position. 
re ohn E. Gavit, Esq., and Dr. Thomas T. Sabine of New York, 
z owed all my examinations at Eastport. In a forthcoming 
oo of the Boston Society of Natural History all the details 
these examinations will be given. 
EXPLANATION OF Puate III. 
tals. 
Figure ee Glandular organs supposed to be testes, seen from below. 
2. Portion of left oviduct with its relation to the supposed testis. a, ovi- 
. due , its external opening. «¢ i 
3. Left oviduct as it appears from the front through perivisceral wall. a, 
ovid b, its external opening. c, in ning. d, ovaries in 
pallial membranes. , left divaricator muscle. F.¥.F. Eggs entering, 
w passing through, and escaping from oviduct. 
4. Right oviduct seen from behind. a, intestine. 64, anterior ocelusor 
s. ¢, oviduct. d, internal mouth of oviduct held in the ilio- 
parietal band “Jike a landing net in its loop.” ¢, ilio-parietal band 
ecessory heart of Hancock. 
ine is thrown into folds, in consequence of the 
traction of the outer wall of intestine, 
Figs. 6 and 
Figs Embryology. 
1 to 12, showing various stages of embryo. 
8, partial side views. 
Figs. 7 and 11, side views. 
- 12, partial end view. 
Fig. 1 
