NATURAL SCIENCES OV PHILADELPHIA. 109 



170. Anser frontalis. May be the young of the preceding. Never but one 

 obtained. 



171. Chen hyperboreus. 172. Lettcohlepharon canadensis. 



173. Bernicla parvipes. Much more common than the preceding; breeds 

 in the southern portion of New Mexico, in the vicinity of Fort Thorn, and above. 



174. Bernicla Brenta. Quite rarely met with. 



175. Anas Boschas. 



176. Anas obscura. Much rarer than the above. 



177. Dufila acuta. 178. Quebquedula Discoes. 

 179. Q. cyanoptera. 180. Spatula ci.ypeata. 

 181. Mareca Americana. 182. Aix Sponsa. 



183. Fulix marila. 



184. F. collakis. Abundant in the sprhijr, 



185. Aythya Americana. 186. A. v. > t.-weria. 



187. Bdcephala albeola. Much more rornnion on the mountain brooks than 

 on the Rio Grande, but not often met with -southern New Mexico. 



188. Erismatdra rubida. But few ever i-ict with. 



189. Mergds Americanus. 



190. Lophodytes cucullatus. Very common on the Mimbres, and occasion- 

 ally met with on the Rio Grande. 



191. Cyrtopelicanus erythborhynchus. Common above latitude 32. 



192. Graculus Mexicanus. Very common during April. 



193. Plotus Anhinga. Not many observed. 



194. Larus Delawarensis. A very few v uet with on the Rio Grande, in win- 

 ter and spring. 



195. Sterna Wilsonii. Common in September on the Rio Grande. 



196. S. fuliginosa. A few seen on the Hi Grande. 



197. Colymbus torquatus. 198. Pooyumbus podiceps. 



Mr. J. P. Lesley was appointed to fill a vacancy in the Committee on 

 Palaeontology, and Mr. Joseph Jeanes to fill one in the Committee on 

 the Library. 



April 5th. 

 Mr. Lea, President, in the Chair: 



Forty-eight numbers present. 



The following papers, by Theo. Gill, were presented for publication 

 in the Proceedings. 



On Dactyloscopus and Leptoscopus, tsvo new genera of the family of 

 Uranoscopidse. 



On the genus Callionymus of authors. 



Description of Hyporhamphus, a new genus of Fishes, allied to Hc- 

 mirhamphus. 



Notes on a collection of Japanese Fishes, made by Dr. J. Morrow. 



And also the following : 



Description of eight new species of Unionidae, from Georgia, Missis- 

 sippi and Texas, by Isaac Lea, 



And were referred to committees. 

 1859.] 9 



