1884. | Zoology. 315 
commencement of that reciprocal “ reflex and preventive action 
to which modern psychology ascribes such great importance.” 
——lIn a recent number of the Bulletins of the Museum of Com- 
parative Zoology, Mr. J. W. Fewkes gives a list of thirty-five 
Medusz found in Castle harbor, Bermudas, in May and June, 
1882, describes the new species Tamoya punctata and Oceanopsis 
bermudensis, and gives notes on an unidentified Cladonema, an 
Ectopleura, and an Ephyra with sixteen tentacles. 
Echinoderms.—Mr. F. J. Bell describes (Ann. and Mag. Nat. 
Hist., Dec.) Asterias nautarum from Ecuador, and Cuicita acutis- 
pinosa trom Aneiteum, New Hebrides. 
Vermes.—In the October issue of the Annals and Magazine of 
Natural History, Mr. F. E. Beddard has a note upon four species 
ofearthworms from India viz., Megascolex affinis, Pericheta ar- 
mata, Perionyx macintoshii, and Typheus orientalis, the three last 
new. The anatomical characters of Typhzus are quite different 
from those of any other genus before described. 
_Mollusca—The efforts of Mr. J. A. Ryder to artificially fer- 
tilize the ova of the American oyster have at last proved success- 
ful, The sexes of the oyster can be readily distinguished by the 
“drop test,” that is, by the different behavior of a drop of milt, 
when placed in water, from that ofa drop from the ovary of the 
female. The milt and ova were mixed ina dish, then poured into 
à pail of water, and then into a pond filled with sea water, which 
nits passage was compelled to pass through a filter of sand, so 
as to avoid all possibility of the entrance of germs from the out- 
side. Forty-six days after the experiment was commenced spat 
from one-fourth to three-fourths of an inch in diameter was found 
a the pond. Mr. R. E. C. Stearns, in a letter to the Fish 
Commission, States that Glycimeris generosa, of the western coast 
of the United States, attains a weight of sixteen pounds, and is 
Probably the largest Saxicavid known, and, next to Tridacna 
sigas, the largest clam in the world. 
a Was fixed in the cavity formed by the junction of the four 
ion Which unite the stomach of the jelly-fish to the um- 
ar - Comparison of the notes of various observers leads the 
hese to the conclusion that Medusz do not eat small fishes, 
do mae beret digestive apparatus could not digest ; nor 
e Pay young of certain fishes, the adults of which live at more 
tain Mousiderable depths, come up to seek and reside with 
ee Miss Rosa Smith (Proc. U. S. a a 
7 interesting notes on twenty-five species of fishes taken 
at 
Todos Santos bay, Lower California, 
