Shufeldt: Birds from Bermuda. 361 



finits, there are six (6) ha?mapophysiaI facets upon either costal bor- 

 der, the well-marked concavities among them being nearly square in 

 outline. The external xiphoidal processes were broad, and extended 

 outwards as much as backwards — more so even than in Pitffinus 

 major. 



No sacntuis of this bird were collected, while a lateral moiety of a 

 pclz'is possesses all the characters, barring size, which we find in any 

 typical Puffiiuts, as. for example, P. Ihcnninicri or P. major. (Com- 

 pare fig. 64. PI. XXVI, and figs. 85-89. PI. XXVII.) 



Ilium has a length of 4.1 cms. in P. parvus and 5 cms. in P. Ilicr- 

 minicri, while in P. major the length is 7.6 cms. ; ^° some are a milli- 

 meter shorter — probably belonging to female individuals. 



There may be some vertebrae among the numerous examples of 

 those bones set aside as belonging to the " Cahow '' {M. vociferans) ; 

 but I can not pronounce upon that with certainty, as they may be ones 

 belonging to either young or female "' Cahows." 



Five beautiful specimens of the humerus of P. parvus occur in the 

 collection of Mr. McGall, and they each and all belonged to adult 

 birds (figs. 55 and 56 of PI. XXV). Four (4) of these bones possess 

 a length of 5.9 cms., while the fifth measures but 5.75 cms., and may 

 have belonged to a female bird. Its characters are identical with the 

 corresponding ones in a humerus of Audubon's Shearwater, the latter 

 being a longer and a trifle larger bone. (Compare figures 51-60 of 

 Plate XXV.) 



In all Shearwaters the humerus appears to be completely non- 

 pneumatic, the shaft being very straight and more or less compressed 

 in the same plane in which .the extremities occur — that is, from 

 anconal to palmar superficies. The '' ectepicondylar process " is 

 pointed and is a conspicuous feature of this humerus, while the tri- 

 angular radial crest is bent, as a whole, towards the palmar side of 

 the bone. 



10 While examining the bones of Puffinus parvus I met with several frag- 

 ments of an interesting shell, the most perfect of these being in the collection 

 of the American Museum of Natural History; four (4) of the other frag- 

 ments occur in the McGall collection. They are all of the same species, and 

 have been identified for me by Dr. Paul Bartsch, of the U. S. National Mu- 

 seum, as being broken examples of five specimens of Poecilozonites bermuden- 

 sis, Pfr. Doctor Bartsch kindly compared them with specimens in the collec- 

 tion of the U. S. National Museum. 



