358 Mr. Vigors's Sketches in Ornithology. 



panying descriptive characters convey any idea of the form of the bill of 

 the bird before me. 



Fratercula cirrhata, jun. ? 



Frat. fronte genisque albis, cirrho postoculari Jlavescente brevi, 

 capitis vertice dorso pectoreque nigris, abdomine grisescente, rostro 

 compresso carinato. 



This bird, although not belonging to the public collection sent to me 

 by Captain Beechey, came from the same locality as many specimens of 

 Fratercula cirrhata, and differing from them in no material points except 

 the bill, is most probably the young of that species. The keel of the 

 bill is more elevated and compressed than that of Frat. cirrhata, w^hich 

 is flattened on the culmcn, and much rounded on the sides. There are 

 some differences also in the colours, as may be seen by comparing the 

 descriptions; but not such as maybe considered incompatible with the 

 different stages of the same species. Like the Hornbills, to which the 

 birds of this group shew some analogy, they may exhibit a material differ- 

 ence in the shape of the bill according to age. This is a matter of fact 

 to be determined only by time and observation. Should the bird before 

 us prove distinct, it may receive the specifick name of carinata. 



Larus Belcheri. 



Lar. fuscescenti-plumbeus, subtiis pallidior; remigibus primariis 

 rectricibusque nigris; uropygio, remigum rectricumque apicibus albis ; 

 rostro rubra apice nigro. 



Longitudo corporis, 21 ; rostri, 2 ; alee a carpo ad remigem Imam, 11 ; 

 caudcB, 6; tarsi, 2. 



The specimen from which the above description was taken, was presented 

 to the Society by Edward Belcher, Esq., first Lieutenant of the Blossom. 

 That gentleman will, I hope, accept the dedication of this species to him, 

 as an offering of friendship. 



(To be continued. J 



