NATURAL SCIENCES OF PHILADELPHIA. 19 



Genus TETMEMURUS. 



T. QIQANTEUS, n. 



T. maximus, oblougus, diametro 3 plo longior ; apice baud attenuate, late 

 rotundato ; suturis profundis, linearibus ; cytiodermate irregulariter granu- 

 lato-punctato. 



i?ja?«.— 24-7500 = -0031. 



I found this beautiful desmid in a stagnant pool in Bear Meadows, Centre 

 Co., in the month of August. It is very different in its outline from its near- 

 est ally, T. granulatus. The diameter is preserved uniform until, at the very 

 end, where there is an alteration in the line of the margin, so as to cause some 

 contraction. This is, however, wanting in some specimens. The ends are 

 therefore broad and obtuse. The size ia also double that of T. granulatus. 



Dr. Mitchell exhibited a perfect egg, with shell, enclosed in a 

 larger egg. The outer egg contained albumen and a partial yolk. 

 The hen from which the specimen was obtained had produced several 

 similar ones. 



Dr. W. F. Norris was chosen a member of the Section. 



Dec. 6th, 1869. 



Director, S. W. Mitchell, M.D., in the Chair. 



Eleven members present. 



Mr. Walmsley donated three preparations of the lung, liver and 

 kidney of the rattlesnake injected. 



Dr. S. W. Mitchell exhibited specimens of hydrate of chloral in solid, and 

 in aqueous solution. He had administered hypodermically to a pigeon 10 

 grains, producing immediate death. Three grains similarly administered 

 resulted in death at the expiration of between two and three hours ; the 

 pigeon having, however, several times apparently expired before death 

 actually took place. To a rabbit 15 grains were administered hypodermically, 

 death occurring in an hour. In each instance, rigor mortis supervened rap- 

 idly. 



The election for officers for the ensuing year was held, which 

 resulted as follows : 



Director, S. W. Mitchell, M.D. 



Vice Director, Wm. Pepper, M.D. 



Recorder, Jas. Tyson, M.D. 



Treasurer, C. N. Pierce, D.D.S. 



Curator, W. H. Walmsley. 



PuhJiccUion Committee. Recorder, ex off., Chairman ; F. W. 



Lewis, M.D.; W. Pepper, M.D.; 31. W. McAllister; W. S. Bolles, 

 M.D. ; J. G. Hunt, M.D. 



Curators. — W. H. Walmsley, er of., Chairman ; J. G. Richard- 

 son, M.D.; T. W. Starr; F. W. Lewis, M.D.; W. F. Norris, M.D. 



Auditors.— B.. M. Bellows, M.D. ; W. McFadden, J. W. Queen. 



1869.] 



