Miscetanies. a wes 
e WNarrca CANALICULATA. ‘Testa ovato-conicd, ponderosA; spirh 
Fetus: anfractibus quatuor, superne subcarinatis ; sutura profundé 
impressa ; apertura. semilunari; umbilico parvo, lineari. Long. 145 
. poll. =a . 7 poll. 
NA NERITOIDEA. TestA ovato-globosd, tenui, levi, flaves- 
cente, sade scabra ; anfractibus tribus convexis, ultimo magno; 
spira fere nulla; apertura obliqua, semilunari; umbilico profundo. 
Long. } poll. Lat. 3 poll 
Pinicn > ak a Testa fusiformi, alb& vel castaned, longi- 
tudinaliter 15 ad 20 lamelloso-costata; caudd longiuscula; apertura 
spiram equante. Long. 12 poll. Lat. 4 po 
USUS TORNATUS. Testa ovate-coniel, cietiasatl, pallide cornea’; 
anfractibus sex vel septem convexis, costis tribus obsoletis, castaneis 
einctis; apertura ao evasi, spiram equante; canali brevi, 
anh recurva, g. 23 poll. Lat. 2 poll. : 
CINUM RosAcEUM. ‘Testa parva, conico-acuta, alba, rosaceo- 
ibe: ; anfractibus sex, plano-convexis, spiraliter lineolatis ; apertu 
spira breviore ; columella arcuata, planulata. Long. ;3; poll. Lat. 3; 
poll. 
Dr. J. Wyman exhibited the intestine of a mackerel shark, (Lamna 
punctata, Mitchill,) showing the ducts of the pancreas and liver, the 
spiral valve formed by the mucous membrane of the intestine, a com- 
munication between the cavity of the peritoneum and anus by means 
of two small canals, and an opening in the Jower part of the intestine 
communicating with a hollow organ, on which commenced the first 
branches of the vena cava. 
August 7, 1839.—Dr. J. B. S. Jackson, in the chair. 
Dr. J. Wyman made a written report on the electrical eel, (Gym- 
notus electricus, Lin.) exhibiting dissections of the electrical organs, 
and of the nerves by which they are supplied; he also gave an ac- 
count of the physical and physiological properties of the clecininial 
developed by this fish, and showed the analogy between it and ¢ 
mon electricity. 
Dr. D. H. Srorer read a communication etsine Mr. J. G. Anthony. 
_ Of Cincinnati, giving a description of the two following new — 
of shells; viz. Helix striatella and Paludina Cincinnatiensis. 
_ Dr. S. also gave an account of an elephant shark (Squalus Gon. 
Le Sueur) taken near Provincetown, Mass., measuring 30 ft. in length. 
Mr. J. E. Tescuemacuer exhibited some fossil corals and madre- 
Pores in limestone, from Devonshire, England, beautifully ground and 
polished ; also some photogenic drawings of plants, feathers, &c., 
: copied from nature. 
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