1190 General Notes. [November, 
this region, the chief effect of these settlements upon the pan- 
thers will be to furnish them with a larger supply of domestic 
food and to drive off the hereditary enemy of the panther, the 
bear, while the rocky retreats where the panther makes his home 
will remain as inaccessible as ever.—Livingston Stone, in Forest and 
Stream. 
ZootocicaL Notes.—Cwlenterates— Mr. Ryder (Bull. U. S. 
Fish Comm., p. 165, 83) calls attention to a new enemy of the 
oyster brood. It appears that a species of Actinia which is very 
often attached to oyster shells swallows the embryo oyster, and 
ejects small bluish-gray pellets from its mouth, these pellets con- 
sisting of nothing but the empty shells of young oysters, the re- 
mains of the ingested food of the Actinia. 
Worms.—An important and fully illustrated paper by Hugo 
Schauinsland, on the embryology of the Trematode worms, ap- 
pears in the Jena Zeitschrift for July 20. The development of 
several species of Distomums and of Aspidogaster conchucola 1s 
given with more or less detail. 
Mollusks.—Mr. J. A. Ryder, in his studies on the development 
of the oyster (Bull. U. S. Fish Comm., Feb. 1, 1883), ices 
that the description given by Hatschek of the first appearance ™ 
the shell in Teredo, agrees perfectly with that observed by him 
(Ryder) in the oyster, “and we may, as it appears t ee 
safety assume that che development of the shell in all mollusks sa 
place in the same way. This admıts of no question, and as te 
last-named investigator very justly observes, it is a weighty argi" 
ment in support of the position so ably defended by Von Ihering, 
viz., the theory of the monophyletic descent of the Mop k 
Crustaceans —Of Gerstaecker’s Arthropoda, Lief.9 and a w 
2d part has been received ; it continues the account of "a 
a, finishing the account of their geographical yes mphi- 
their distribution in time, and begins the aese of the Sep — 
pod Crustacea. It is accompanied by six plates. eae 
Fishes —Mr. Ryder (Bull. U. S. Fish Comm., Feb. 13, '83) ae 
cords his observations on the absorption of the yelk, a 
feeding and development of embryo fishes, with notes eee 
remarks will be of general interest to embryologists. alt mt 
claims that the protoplasm of different species of pE ib revi 
have a specific character. J. Swain and G. B. ibing one 
(Proc. U. S. Nat. Mus., v, 638) the genus Noturus, m ya is 
new species. A little-known whitefish (Career Nat Mus, — 
described in full by Dr. J. T. Bean in the Proc. U. Fepidosaurls 
v, 658. Dr. Bean also describes a new species of Alepo a 
(A. esculapius) from Alaska. p 
