Shufeldt: Birds from Bermuda. 359 



skeleton numbered 17724 {"P. obscurus") in the collection of the 

 U. S. National Museum is in fact Audubon's Shearwater, then the 

 species here being described is certainly a new species as well as an 

 extinct one. Mr. C. Mailer collected the specimen of " Ptiffinus ob- 

 scurus," No. 17724. and he collected it at the " Bermudas." This still 

 further emphasizes the fact that it probably represents the skeleton 

 of an Audubon's Shearwater, and that it was a larger species than 

 the one here being considered. The metatarsal bone in No. 17724 

 measures in length exactly 1.60 inches, and this agrees with the 

 length of the tarsometatarsus of Audubon's Shearwater as given by 

 Coues and set forth above. With all this evidence and these facts 

 before me, I shall consider for the present that the skeleton No. 17724 

 is one of Puffinus Ihcrminicri, and use it in comparison in the present 

 instance. This will not militate against anything I have set forth 

 above in regard to McGall's Shearwater {P. mcgalli), or the use I 

 made of the sternum and shoulder-girdle sent me by Mr. Maynard. 



Taken together, and judging from the material before me, the bones 

 representing Puffinus parvus probably belonged to three different 

 adult individuals. That this may have been the case is based on the 

 fact that there are in it five perfect humeri, or those belonging to 

 two specimens and one of a third. There are two pairs of tarso- 

 metatarsi, two pairs of uln?e, and so on. Had there been one less 

 humerus. I should have said that the bones in the combined collections 

 represented tivo adult specimens of P. parvus; but the fifth humerus 

 makes it possible that three or more may be represented. 



The mandible of Puffinus parvus is of the V-shaped pattern, with 

 the narrow dentary portions drawn very close together — the symphysis 

 being short and the distal apex sharp-pointed and slightly decurved. 

 There is a small ramal vacuity in the deeper ramal divisions, the side 

 of the jaw upon either hand curving upwards and forwards where it 

 is located. Posteriorly, the articular ends are concaved and very 

 slightly truncated. Mesially, the articular cups for the quadrates 

 support the usual inturned apophyses, with the pneumatic foramen at 

 the apex of each. The extreme length of one side of this mandible 

 measures 5.4 cms. 



Turning to the mandible of the specimen of "P. obscurus" (No. 

 17724), I find the characters to be much the same, although there are 

 slight but recognizable differences here and there. For example, the 



ANN. CAR. MUS. XIII, 24, FEB. 21, 1922. 



