Shufeldt: Birds from Bermuda. 381 



upon the anterior aspect of the shaft, especially between the middle 

 and outer ones, wherein we find, as usual, and at its usual site, the 

 elliptical foramen for the passage of the anterior tibial artery to the 

 plantar aspect of the foot. 



There is rather a large number of pedal phalanges in the collection, 

 especially in Mr. McGall's part of it. These I have assorted accord- 

 ing to their lengths, but without a skeleton of the foot of this Petrel 

 before me, or of an Aistrelata of any species. In face of the fact 

 that these joints vary in size according to age and sex, and, further, 

 that there are nearly thirty of them in the two feet of a single indi- 

 vidual, I would hardly undertake to restore a foot — either the left or 

 the right — from the material at hand. Were all the phalanges repre- 

 sented, and for both feet, this could be done with certainty, however 

 large a number there was in the collection. An X-ray or radiograph 

 of a foot of one of the specimens of ^strelata caribbcra, of the U. S. 

 National Museum collection, might be of assistance in the matter, but 

 the gain would hardly justify the outlay in time and expense. In 

 any event, the skeleton of pes in ^^strelata vociferans was doubtless 

 quite in agreement with what we would find in any medium-sized 

 Petrel now in existence, and our knowledge of that is already in the 

 possession of science.^^ 



Addenda. 



After the above memoir was entirely ready for publication, with 

 its sixteen plates, Mr. McGall made additional collections of bird- 

 bones at the Bermuda caves, visiting others not previously examined 



19 Among the pedal phalanges of Mr. McGall's collection. I have met with a 

 single joint which I am inclined to believe belonged to the species of Shear- 

 water now bearing his name and described above. It is very straight and 

 markedly slender ; further, it is altogether too long to have belonged to ^stre- 

 lata vociferans, as it measures no less than 2.9 cms. in length. In the skele- 

 ton of the foot of a specimen of Piiffinus borealis (No. 17769, Coll. U. S. 

 Nat. Mus.), the basal phalanx of the inner toe measures in length 3 cms., 

 and the bone is slenderer than the basal joint of the middle toe, which latter 

 measures in length 2.8 cms. At the same time it is, as I say, a somewhat 

 stouter bone than the aforesaid basal phalanx of the inner toe. Judging 

 from this data, I believe that the subfossil pedal phalanx just referred to 

 above belonged to an adult S'pecimen of Puffinus mcgalli, and possibly to the 

 same individual to which belonged the sternum described upon a previous 

 page of this memoir. 



