138 PROCEEDINGS OP THE ACADEMY OP 



factory, and although the synonyms of the two species are indiscriminately 

 adduced, (thus, e.g., Lotus parasitica, Linn, and Catharaela parasitica, Brunn., 

 with Stercorarius longicaudatus, Briss., &c.,) yet in his further description he 

 says of it, " 21 pollices longus." The common Jager never attains to this 

 dimension. 



Latham commits the error of giving Stercorarius longicaudatus, Briss., as 



the male," and Stercorarius , Briss., (without a specific name,) as the 



female of his species ; whereas, these two citatio* really refer to the two 

 distinct species. 



The specific name " longicaudata , ' > of Brisson (1760) being untenable for 

 obvious reasons, " cepphus" of Brunnich (1764) being too indefinite to 

 warrant its employment, "parasitica" of Brunnich (1764) being used for 

 the common Jager, the first definite distinctive name for the long-tailed 

 species appears to be " Buffoni" of Boie, (1819.) This specific appellation 

 we accordingly adopt. 



Note. The present paper completes a series of brief reviews of the 

 three most important of the four subfamilies of the Laridae, viz. : the La- 

 rinse, Sterninag and Lestridinae. In conducting an investigation into the 

 characters and the bibliography of these groups, with special reference to 

 North American forms, it has been thought expedient to issue in advance a 

 brief prodromus, so to speak, of each subfamily as soon as its examination 

 was completed. Combining the results arrived at in the investigation of each 

 of these groups, and making whatever additions or modifications future re- 

 search may dictate, the writer hopes before long to present a more complete 

 and elaborate Monograph of the North American forms of the Laridae. It is 

 contemplated to present the anatomical as well as the external characters, 

 both of the higher groups and of the more marked species ; the changes of 

 plumage, dependent upon either age, season, sex, or pure accident, which 

 examination of very extensive series may show ; together with the biblio- 

 graphy of each species, and a discussion of doubtful points of nomencla- 

 ture and relationship. The Monograph will be illustrated by colored plates 

 of the bills, wings, feet, &c. of most of the species, showing exactly wherein 

 one differs from another ; and no pains will be spared to render it a complete 

 exposition of the present state of our knowledge of this family of birds. 



Synopsis of the MARINE INVERTEBRATA collected by the late Arctic 

 Expedition, under Dr. 1. 1. Hayes. 



BY WM. STIMPSON, M. D. 



The collections of Dr. Hayes, as might be expected from the thorough search 

 to which the Arctic regions have lately been subjected, and the characteristic 

 paucity of forms existing there, embrace few novelties. They possess, however, 

 great interest, from having been found in great part at localities much nearer 

 the Pole thau any previous expeditions have succeeded in reaching on the 

 American side of the Arctic circle. They include some species hitherto 

 found only on the European side. And, we may add, the number of species 

 collected by Dr. Hayes is greater thau that brought back by any siDgle ex- 

 pedition which has yet visited those seas, as far as can be judged by published 

 accounts. 



Of the localities mentioned below, Port Foulke and Littleton L. are on the 

 eastern or Greenland shore of Smith's Straits, in lat. 78. Cape Faraday is on 

 the west shore of the same Straits, in lat. 79 45'. Godhavn is at the southern 

 end of Disco Island, in lat. 69 nearly. 



[May, 



