Journal of the Philadelphia Academy, 589 



sis : and^'^ Description of a new Fish of the genus Salmo,^^ the 

 Salmo microps^ which is proposed as the type of a new sub-genus, 

 Harpadon, with the ^' Jaws, tongue, pharynx, wings of the pa- 

 late, and vomer, armed with moveable, slender, curved teeth ; 

 those of the jaws barbed." A figure of this fish, which is from the 

 East Indian Seas, accompanies the description. 



The contributions to the department of the Invertebrata are 

 wholly from the pen of the indefatigable Thomas Say. Two of 

 *hem are entomological, one has reference to the Mollusca, and 

 another to the Radiata. In his '' Descriptions of new species of 

 Hister and Hololepta, inhabiting the United States," Mr. Say 

 describes twenty-one species of the former, and two of the latter, 

 genus. His " Descriptions of new species of Coleopterous Insects 

 inhabiting the United States," extend to about one hundred, all 

 of which, except two, are pentamerous. The whole of them are 

 referred to established genera, although in one or two instances 

 dififerences of structure are pointed out which might have autho- 

 rized the proposition of new groups for the reception of the indivi- 

 duals in which they were found to exist. 



The '' Descriptions of some new species of Fresh Water and 

 Land Shells of the United States," extend to nineteen, some of 

 which are deserving of particular notice. One of them, a Melaniay 

 forms a second species of Mr. Say's proposed genus Anculotus : 

 another is a Fusus, which exhibits the anomaly of living in fresh 

 water only : and a third constitutes a link intermediate between 

 Alasmodonta and Anodonta^ the primary teeth being obvious 

 when the shell is young, but when it arrives at its full growth 

 becoming obsolete, and in some instances not at all visible. 



In his paper '^ On the species of the Linnean genus Asterias, 

 inhabiting the Coast of the United States," Mr. Say describes six 

 species of Asterias, Lam., five of which are new ; ten of Ophiura, 

 Lam., one only of which is suspected to have been before noticed ; 

 another species of this genus from the West Indies ; one species of 

 MuryaUj Lam. ; and one of Alecto^ Leach. 



