193 



Toxopneustes drohachiensis, Ag. Drobak (^Sars.^ Oresund (Esch- 

 richi). Behring Straits (Stimpson).* Specimens- in collection 

 of the Smithsonian Institution. Awatscha Bay (^Stimpson).^ 

 Specimens in collection of the Smithsonian Institution. Gulf of 

 Georgia, W.T. (A. Agassiz).* Hudson's Bay (Z)?-ea;Zer). Speci- 

 mens in collection of the Smithsonian Institution. Greenland. 

 Labrador (Dr. J. Wymati). Nova Scotia (P. C. HUT). New- 

 foundland (Miss Dix). Grand Menan (Siimpson, Mills). ■\ Coast 

 of Maine (Verrill, Shaler, Hyatt).] Massachusetts Bay (Agas- 

 s/z).§ Nantucket (Agassiz).% New Jersey (Capt. Gedney, U. 

 S. N.) Specimens in Smithsonian collection. 



Prof. Agasslz announced to the Society that the cast of the Mega- 

 therium presented by Mr. Bates had been mounted at the Museum of 

 Comparative Zoology. After it was j)ut up he had examined it care- 

 fully, and had come to the conclusion that the mode of mounting, 

 which Is very nearly that of Owen, was not quite accurate ; and that 

 the Megatherium, Instead of being set up erect, should have been 

 placed in a crouching attitude, with the hind legs bent, sufficiently so 

 that the tail should touch the ground, — with the head bent down be- 

 tween the front legs, the broad chest resting upon the ground, sup- 

 ported by the fore-legs, extended in such a way that they should rest 

 for nearly their whole length, and leave simply a free play for the ex- 

 tremities to reach out beyond the head. As he understood that the 

 Society were to have a similar cast, he made these suggestions for the 

 benefit of whomsoever should have the chai-ge of mounting the speci- 

 men. 



Prof. Wyman exhibited drawings of two specimens of monstrosity 

 in serpents. One of these, presented to him by Prof. Agassiz, was of 

 a young black snake (Coluber constrictor), which had two complete 

 heads united to a single trunk. The vertebral column was double 

 for a short distance behind the head, and over the same region the 

 transverse black bands, usually found in the young of this species, 

 were divided lengthwise. 



The second drawing, as seen in the annexed figure, was of a speci- 

 men of the water adder ( Trojndonotus sipedon), belonging to the 

 Massachusetts State Collection, and kindly loaned for description 

 by Mr. C. L. Flint, Secretary of the Board of Agriculture. As It is 

 a unique specimen, and a gift to the State collection, a complete dis- 



* ( Echinus chlorocentrotus Br.) 

 if (,E. granulatus Stimp.) 

 X (E. granularis Say. ) 

 5 [E. granulatus Gould.) 



PK00EEDING9 B. 8. N. H.— VOL. IX. 13 MAY, 1863. 



