riUNATUHlD.K — THE LOON'S - UKLXATOR. 



451 



the plumage also sli^'htly dillVreiit. liill very lar^e, iniuli impressed, the tenniiiiil lialf tupering 

 rapidly from the well-deliiied or even pMinineiit iiiij,'h> at the liase ot' the },'oiiys ; i uliiieii almost 

 porlei'tly striiiiiht ; feathering on sides of maxilla reaihing iiea-ly to anterior end nf the nostrils. 

 Aihtlt : Upper half of the head (ine'.ndin.i,' loral, orhital, and auricular regions), with najie, dull Idaik, 

 with slight brownish green relli'ilions ; lower half of head (im liidiiig malar region, chin, and throat), 

 with forenock and lower neck, all round, Mui -'''i.k, with violel-lilue retlections ; lureneik crossed 

 liy a bur of white longituilinal spots, these ^.iiili liroader than in I', inniii r ; -ides uf the neck, 

 bidow this l)ar, with ii transverse broad iiatcli of similar markings. Upper [larts Idack, vuiiegaled 

 by white dots, as in (/. immn; but those of the scajiulars much longer ihar bmad, instead of 

 nearly wptarc ; lower parts white, the sides of the jitguhim stieaki'd with black ; sides and tlatiks 



V. Atlam-ii. 



blue-black, variegated by small round dots of white, liill dull yellowisli, dusky Im.sally, inclining 

 to ivory-white terminally ; iris •• ligiit recldish brown ; legs and fi'et olivaceous." I'diM;/.- Similar 

 to that of U. immir, Imt larger, the bill laiger, deeper, more compressed, anil with a decided 

 goiiyileal angle ; under side of head and neck grayish while, clouded wilh sooty grayish brown. 



Wing, IJ.So-l.j. I."» inches (average, l."). II); culmen, H..')0-:i.i;:) ('..,")!»); dejith of bill through 

 liase, l.(H>-|.u>(i (I. (»!)); tarsus. ;j. l>.-,-:J..V) (:$.»!); outer toe. t.l.')-4.(i.") ( i.M). (Six adulls.) 



So far as American .specimens aiv coneerned, this species appears to be perfectly distinct from 

 U. imnwr, no examples at all intermediate occurring in large series of ilu' two. It is a much 

 larger biri! in all its measurements, the bill is vi'ry dill'iTently shapeil, and the plumage (juite 

 distinct in the points referred to above. 



In "Birds ol' America," Vol. VII. ji. •_'!•!, .Vudjibon jiroposes a name. ( 'u/i/oi/iks I!lilt(irili<mii, 

 which sonu> writers have considered as belonging to the present biiil ; but although specimens of 

 what were uni|Uestionably ('. Adumsii, cidlecleil by Captain Itoss, are mentioned in the same 

 ]iara;'raph, the name Culiimhii.i HirluirilMiii was clearly .iwed upon "rt very huge and luui'lsifmilij 

 (•ri'»tiil Diver " which Dr. Richanlson saw during one of his northern Journeys, and which, "although 

 somewhat prematurely," Audubon pniposed "honoring with the name nf Culiiiiiliii.^ liiih'inhtiin'." 



Mr. .Vtiduixm (•* Birds of America." V!I.2".)1) refers ton speeiuieii of a Loon f,'iven 

 to him by ('iii)taiii .Fames Clark Hoss wliiidi had been proeured in a very idgli latitiiile, 

 ami whi(di, upon inspection, he found to dilTer from tlie common Northern I)iver in 

 having the point of tho hill sli^;litly recurved, ami .«f a line yellow tint; and Or. 

 Itichardsoii also informed him that lie iiad met with a very large ami liandsonndy 

 crested Diver. Ke^arding tiie hitter as a new and umlesi'ribed species. Audiiltoii 

 proposed for it tiui name of Coli/mhus Ulihniilsou!. This, however, eonld scarcely 



