350 Annals of the Carnegie Museum, 



piece and the anterior narial apertures was altogether too short for 

 a Shearwater, while it quite agreed with those parts in jEstrclata. 

 The piece, however, is not sufficient to decide, with certainty, as to 

 what species of Atstrelata it may have belonged in life. It almost 

 agreed in size and form with the beak in ^strelata carihhcca, though 

 quite possibly it may have agreed with the same part in some other 

 petrel of that genus of a different species. Upon comparing it with 

 other terminal parts of the superior mandi.ble in other specimens of 

 the skulls in the Bermuda collections at hand, I found that it very 

 evidently belonged to a species abundantly represented therein, as will 

 be shown further on in this paper. 



A short time before this examination, or upon the 29th of October, 

 191 5, I had made another, which also brought to light some important 

 and interesting results, as compared with those made by Doctor 

 Richmond ; I refer to the skins of Mstrelata carihhcca and ^. hasi- 

 tata, both species being now probably extinct. Of these skins I ex- 

 amined two of the first named and one of the latter. Each specimen 

 of ^strelata carihhcca had two labels — the original and its duplicate. 

 One of the specimens is a male and the other a female. They are 

 sooty-brown birds with ashy rumps, and were collected on the same 

 day and in the same locality.. The original label on the female bird 

 reads: "Edward Newton (2) ^strclata carihhcca $, 17. 11. 79. 

 Hab. Cinchona Pis. St. Andw, W. Rock, Jamaica," and on the other 

 side "80859." The National Museum label reads: "80859 ^strelata 

 caribbcca J, Cinchona Plantations, S. Andrews, W. Rock, Jamaica," 

 and the reverse side: "Edward Newton, Nov. 17, 1879." The labels 

 on the male bird are the same, with the exception that the National 

 Museum number is 80860. 



Measuring the bones as best I could through the skin in all cases, 

 and disregarding the theca of the superior mandible. I obtained the 

 following results: In the male bird, the left ulna has a total length 

 of 9.50 or 9,51 cms.; the left tarsus 3.52 cms.; the length of the skull 

 is 7.00 cms. 



In the female bird, the right ulna has a length of 9.51 cms.; the 

 right tarsus 3.51 cms.; and the length of the skull seems to be some- 

 what longer than in the. male, having a length of 7.25 cms. 



The fact that the skull of the female is slightly longer than that 

 of the male is doubtless due to the fact that, in skinning the bird, the 



