439 



U.S.A., with cavities containing two fluids and a gas. The 

 bubbles move on rotating the stage and will disappear at a 

 temperature of 83° F. Small fragments of this quartz struck 

 with a hammer give a sharp report. 



Mr. H. Morland : Front and side views of Triceratium sjnnosum 

 Bailey, from an artesian well boring, 406 feet deep. Atlantic 

 City, N.J. 



Mr, J. T. Holder: Transverse section through the entire 

 stomach of a frog. 



Mr. A. Earland : Miscellaneous organisms, other than forami- 

 nifera, picked out of sea soundings : Radiolaria, Sponge spicules, 

 Mollusca, Ostracoda, Fish teeth, Bryozoa, etc. 



May 18th, 1900. 



Mr. A. Earland : Two varieties, long and short necked, of 

 Lagena lagenoides, from Timor Sea, 50 fathoms. 



Mr. J. T. Holder : Mesentery of Frog showing " pavement " 

 epithelium. Nitrate of silver and hsematoxylin preparation. 



June 1st, 1900. 



Mr. A. E. Hilton : Sjnrogyo'a in conjugation, showing the cells 

 before, during, and after the passage of the contents from the 

 male to the female filaments. 



June 15th, 1900. 



Mr. C. F. Rousselet : A variety of A^otops hrachionus with two 

 spines, reared from dried mud received from Rhodesia. 



Mr. E. T. Lewis: Specimens of Ixodes rediLvius, (^ and ? in 

 copula. 



Mr. A. E. Hilton : Portion of polyp of Sea-Pen, Pennatida 

 2)hos2)horea, showing extended tentacles and spicules surrounding 

 the mouth. 



July 6th, 1900. 



Mr. H. Morland: Rhaphoneis amphiceros var. teto^agona (formerly 

 known as Amp)hitetras crucifera) from Madagascar. Mounted in 

 styrax. 



