138 PROCEEDINGS OP THE ACADEMY OF 



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

 adduced, (thus, e. g., Larus parasitica, Linn, and Catharacta parasitica, Briinn., 

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

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

 dimension. 



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



the wia^f, and Stercorarius , Briss., (without a specific name,) as the 



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

 distinct species. 



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

 obvious reasons, — ^^ cepphus" of Briinnich (1764) being too indefinite to 

 warrant its employment, — ^^ parasitica-' of Briinnich (1764) being used for 

 the common Jiiger, — the first definite distinctive name for the long-tailed 

 species appears to be '^ Bufoni" 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, Sterninfe and LestridinjE. 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 Laridse. 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 MAEINE INVERTEBEATA collected by the late Arctic 

 Expedition, under Dr. 1. 1. Hayes. 



BY WM. STIMPSONj M. D. 



The collections of Dr. Hayes, a.s 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 than 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 than that brought back by any single ex- 

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

 accounts. 



Of the localities mentioned below, Fort Foxilke and Littleton I. are on the 

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

 the west^ore of the same Straits, in lat. I'd" 45'. Godhavn is at the southern 

 end of Disco Island, in lat. 69° nearly. 



[May, 



