Shaler.] 136 [October 6, 



Utriculus Brown, 1829. 



TJtrieulus canaliculatus Stimps., Check List. Bullina canal- 

 iculata Say, Am. Conch., p. 60, pi. xxxix, 1832. Bulla canallcu- 

 lata Gould, Invert. Mass., p. 166, fig. 97 ; De Kay, Moll. N. Y., p. 

 19, pi. xxxv, fig. 328; Bulla obstricta Gould, Invert. Mass., p. 167, 

 fig. 96; De Kay, Moll. N. Y., p. 15, pi. v, fig. 96. 



Not common. 



BULLID2E. 

 Bulla Klein, 1753. 



Bulla solitaria Say, Am. Conch., p. 84, 1822. Bulla insculpta 

 Gould, Invert. Mass., p. 162, fig. 92; De Kay, Moll. N. Y., p. 14, pi. 

 v, fig. 100. 



Not common. Occurs on beaches facing mud flats covered with 

 Zostera, or eel grass. 



[Of the NUDIBEANCHIATA only one specimen has been found; it has 

 not been determined.] 



Mr. N". S. Shaler made a few remarks upon the changes in 

 the geographical distribution of the American buffalo (Bos 

 americanus). The mound builders of the West have pre- 

 served, in various forms, marks of their acquaintance with all 

 the large mammals of the interior of the continent excepting 

 the buffalo. In some late explorations in the " salt licks " of 

 Kentucky, he had found bones of this animal in great abun- 

 dance just below the recent mould, in a bed about eighteen 

 inches thick ; but, in the rich deposits of extinct mammals 

 just beneath, immediately above which traces of worked flint 

 were also found, no buffalo bones were discovered. 



Mr. W. H. Dall stated that, in Alaska, near the great bend 

 of the river Yukon, the bones of the musk ox and of a buf- 

 falo, indistinguishable, according to Professor Baud, from the 

 American bison, are frequently found upon the surface of 

 the ground, having still an animal odor about them. The 



