464 Siorer^s Description of a new Gasterosteus. 



tarsal bones; one only articulates with the leg and this is 

 very much larger than any of the rest — towards the outer 

 extremity, however, and on one side is a Hne as if there 

 had formerly been a small separate bone ; to one of the 

 tarsal bones which is situated on the outer edge, and 

 projects quite beyond the rest, there is attached a very 

 small bone, which appears to be the rudiment of another 

 toe. Each of the four toes has three bones, to which the 

 same remarks will apply that w^ere made in the case of 

 the anterior extremity. ' The muscles of the posterior 

 extremities generally, were smaller than those of the 

 anterior, and in proportion to the size of the bones ; one, 

 which was attached quite round the posterior margin of 

 both shells, was admirably calculated to expel the air 

 from the lungs, by forcing the organs in upon them. 



ART. XXIII. 



NEW 



GENUS GASTEROSTEUS. By D. Humphreys Storer, M. D 

 Read January 17th, 1837- 



i_ 



Of the fifteen species belonging to the genus Gaster- 

 osTETTs of Linnseus^ described in Cuvier's Histoire Nat- 

 urelle des Poissons, four belono- to the United States^ 

 Two of these had been previously described and figured 



his Fishes of New York. Of these, one, 



^ T 



belongs to our Cabinet. In presenting a 

 new species, for which I am indebted to Mr. John W. 

 Randall, I would offer the accompanying description. 



M 



quadracus 



If^. 



'* 



