498 Proceedings of Scientific Societies. [ May 
alone would a account for the effect produced on plants at the 
close of the y 
by the oil-drops in them. Dr. Koenig described a silicate allied 
to black garnet, but with eight per cent. of titanic oxide. Dr. 
Dolley stated that the organ in Porpita supposed by Conn and 
eyer to be a sense-organ was, in truth, a mucous gland furnish- 
ing a plentiful secretion to the tentacles. Mr. Ford exhibited 
oak to Bite the incgease of size of Arca pexata as it goes 
orth and east 
pasas 16.—Professor Heilprin described some miocene 
shells from Cumberland County, N. J. The specimens estab- 
lished the fact that these New Jersey beds belong to the lowest 
miocene. The same speaker showed a curious gastropod, which 
has a two- -story shell, a dome being secreted by the mantle above 
the true spine. Dr. Koenig stated ‘that “ schorlemite” was simply 
a modification of garnet. Professor Ryder described the extru- 
sion of the polar globules from fish-ova. aper, “On an Un- 
described — from West Tennessee,” was presented from 
Dr. F. A. Gen 
November i De Dolley called attention to the action of 
fibres of spider-web in starting lateral branches of stalactites. 
Professor Ryder gave the results of his investigation of the 
hepatic tubules of Oniscus. Professor Koenig placed on record 
the occurrence of a manganese-zinc serpentine at Franklin, N. J. 
November 30.—Miss H. C. DeS. Abbott announced the dis- 
covery of Hematoxylin, or logwood dye, in Sarica indica. In 
the bark it is more plentiful than in the logwood of commerce. 
ema Ryder said he was in possession of facts which proved 
t pathological changes might be transmitted and become 
DP ceokolotieal. 
ecember DRE een Capp e described a new Aplysia 
from the west coast of Florida. The presentation to the Acad- 
emy of the collection of land-shells made by the late Mr. Brown, 
ot Princeton, was announced. 
oy 8, 1887.—Professor Ryder described cph funnel- 
ei a was grai Dr. oe announced to be a nat sad prod- 
uct, and to consist of molybdenite. Mr. Meehan exhibited a 
form of fungus (Cordiceps taylori) which is found on the heads 
of Australian caterpillars. Professor Heilprin described a new 
Ictalurus from Lake Okeechobee, Fla. 
_ January 22—Dr. Fetterolf presented a slab of Mauch Chunk 
red shale from the base of the Carboniferous. It had a fine am- 
