Miscellanies. 197 



Natica canaliculata. Testa ovato-conic^, ponderos^; spir^ 

 retusa : anfractibus quatuor, superne subcarinatis ; sutur^. profunde 

 impressa; apertura semilunari ; umbilico parvo, lineari. Long. lyV 

 poll. Lat. /^ poll. 



Lacuna neritoidea. Test& ovato-globosa, tenui, Isevi, flaves- 

 cente, epidermide scabra ; anfractibus tribus convexis, ultimo magno ; 

 spira fere nulla; apertura obliquS,, semilunari ; umbilico profundo. 

 Long, i poll. Lat. ^ poll. 



Fusus scALARiFORMis. Testa fusiformi, alba vel castanea, longi- 

 tudinaliter 15 ad 20 lamelloso-costata; cauda longiuscula; apertura 

 spiram eequante. Long. If poll. Lat. f poll. 



Fusus TORNATus. Tcsta ovato-conic&, antiquat^, pallide cornea'; 

 anfractibus sex vel septem convexis, costis tribus obsoletis, castaneis 

 cinctis; apertur^ rotundata, evasa, spiram sequante; canali brevi, 

 valde recurva. Long. 2| poll. Lat. 2 poll. 



BucciNUM RosACEUM. Testa parva, conico-acuta, alba, rosaceo- 

 tincta ; anfractibus sex, plano-convexis, spiraliter lineolatis ; apertura 

 spira breviore ; columella arcuata, planulata. Long. j\ poll. Lat. /^ 

 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 betw^een the cavity of the peritoneum and anus by means 

 of two small canals, and an opening in the lovi'er 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 electricity 

 developed by this fish, and showed the analogy between it and com- 

 mon electricity. 



Dr. D. H. Storer read a communication from Mr. J. G. Anthony 

 of Cincinnati, giving a description of the two following new species 

 of shells ; viz. Helix striatella and Paludina Cincinnatiensis. 



Dr. S. also gave an account of an elephant shark (Squalus elephas, 

 Le Sueur) taken near Provincetown, Mass., measuring 30 ft. in length. 



Mr. J. E. Teschemacher 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. 



