. Annual report. 1st-12th, 1867-1878. Geology. BHUFELDT.] OSTEOLOGY OF THE 771. For Cathartes aura we present the reader with the principal variations that we have found to exist, carefully selected from various sources and collections. Mr. T. C. Eyton, in his Osteologia Avium (London, 1867), in a half view of the sternum of this Vul- ture, found it as in spec. No. 692, here given, only the fora- men was a little larger (Pate I, fig. 2, of Eyton's work). We, however, read in the text of this book, page 19-20 (C. aura), "Sternum in general shape similar to Sarcorham- plius, bu
. Annual report. 1st-12th, 1867-1878. Geology. BHUFELDT.] OSTEOLOGY OF THE 771. For Cathartes aura we present the reader with the principal variations that we have found to exist, carefully selected from various sources and collections. Mr. T. C. Eyton, in his Osteologia Avium (London, 1867), in a half view of the sternum of this Vul- ture, found it as in spec. No. 692, here given, only the fora- men was a little larger (Pate I, fig. 2, of Eyton's work). We, however, read in the text of this book, page 19-20 (C. aura), "Sternum in general shape similar to Sarcorham- plius, but with two large fis- sures on the posterior margin next the keel, and two fissures exterior to them; the remain- ing portions Of the Skeleton Cathartes aura, No. 6897 of the Smithsonian collection. are very similar except in ; Now here is a writer that actually contradicts his own drawings by the statement he makes in the text, and we can only believe that Mr. Eyton could have been led into such an apparent mistake by having several specimens of the sternum of this bird at his dis- posal, availing himself of one for his plate and another for his description, perhaps at a later date. This gentleman found his spe- cimen of u Cathartes niger," as we see from an examination of the plate presented, With a 1 ar ge Catliartes awra, 1Tb. 3102 of the collection of the Smith. elliptical foramen on either side; sonian institution. while, on the other hand, in a specimen we received from Florida, and shown in the cut, the arrangement is seen to be entirely different. Gyparchus papa apparently shares the same fate that C. aura does in this respect, for in one Ecuador specimen (Plate XV, fig. 105) the xiphoidal margin is encroached upon on either side of the keel by a broad and rather deep notch, each being of the same size, while, in a specimen of this Vulture from Mazatlan, this is the condition of the bone on the right side of the keel, the left having an additiona
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