213 



Mr. Grote exhibited specimens of Spei'Ierpes salmoneus, as de- 

 termined by Prof. S. W. Garman, taken in springs on the Canada 

 side near the International Bridge crossing Niagara Eiver. The 

 specimens were adults and larvae. It was remarkable in the darker 

 colored larvae that the branchiae or external gills were present, be- 

 coming subsequently absorbed. The specimens were exhibited alive 

 in the aquaria of the society, and the process of shedding the exte- 

 rior layer of the skin in the adult was described by Mr. Grote. It was 

 rolled backwards, catching against the hind legs where it sometimes 

 remained twenty-four hours before being got rid of. The external 

 gills were believed to be retained during life by the Necturus of 

 Lake Erie, merely during the larval state in Sjjerloyes, while they 

 had not yet been detected in the Mejiopoma of the Alleghany Eiver, 

 the embryology of which Avas so far unknown. 



Referring to the swaying movement of live specimens of the 

 3fenopoma, referred to in a paper read before the American Associ- 

 ation for the Advancement of Science at the Buffalo meeting last 

 year, Mr. Grote now thought that it might be concomitant with 

 the act of breathing. 



The following paper was read : '•' Description of a new species of 

 Argulus by D. S. Kellicott." 



