CHAP. III.] 



VERTEBRA AND RIBS : BRADYPUS. 



119 



* 



possible. Welcker's list does not, I believe, include any of the 

 specimens separately given in No. 44. 



The determination of the species is quite uncertain. Welcker 

 in his analysis does not divide the species of Brady pas. In the 

 other cases I have simply taken the name given on the labels. As 

 regards Gholoepus the confusion of species is much to be regretted, 

 for according to the received account 1 the more northern species, 

 G. hoffmanni, has only 6 cervicals, while G. didactylus has 7. In 

 the table it will be seen that four specimens in different places 

 have C 6, though generally marked G. didactylus. Possibly 

 some or all of these are G. hoffmanni, and I have therefore entered 

 them as Gholoepus sp. In the case of Bradypus it has not been 

 alleged that the number of cervicals characterizes particular 

 species, so the fact that the species are confused is of less con- 

 sequence. 



44. Bradypus. 



B. tridactylus 



5» 

 ) > 



5 > 



sp. 



5 > 

 5 > 



sp.? 



B. cuculliger 

 B. torquatus 



ditto 

 Bradypus sp. 



sp. 



sp. 



C 



9 



9 

 9 

 9 

 9 



9 



9 

 9 



8 



9 



9 

 9 



9 

 9 



8 

 8 

 8 



s 



6 



6 

 6 

 5 

 5 



5 



6 



7 



Struthers 3 



6 



6 



C 



5 + 



8 + 

 9? 

 12 

 10 



11 



9 



11 



9? 



11 



Coll. Surg. 3428. 



9 

 10 



C 8 minute c. r. rt. 



C 9 large c. r. both sides (one lost). 



jD 15 moveable r. rt., fixed on 1. 



Camb. Mus. 

 C 9 no rib. Coll. Surg. 3427. 

 Brit. Mus. 919 a. 

 Brit. Mus. 52. 9. 20. 5. 

 C 9 c. r. h in. long. Univ. Coll. Loud. 



frt. ^ n 

 Oxford Mus. 

 Coll. Surg. 3422. 

 7th sacral onlv ankylosed in part. 



Brit. Mus. 46. 10. 16. 14. 

 C 9 small rib-like horn on 1. Mus. 



Med.-Chir. Acad. Petersb. Gruber 2 . 

 Gruber's private collection' 2 . 

 C 8 may have borne rib on rt. 



il. free c. r. 1st thoracic complete, 

 rt. c. r. ankylosed. 1st thor. A in. 

 long, like a c. r. ; ankylosed. 

 C 9 has pair short c. r. Brit. Mus. «>21 b. 

 Gruber 2 . 



Brit. Mus. 47. 4. 6. 5. 

 j 3 specimens from Brazil said to have 

 8 cervicals. No detailed account 



\ 



given. 



I)E BliAINVILLE 4 . 



1 Flower, W. H., Mammals, Living and Extinct, 1891, p. 183. 



2 Gruber, Mem. Imp. Ac. Sci. Pet. Ser. vn., xiii. 1869, no. 2, p. 31. 



3 Struthers, Jour. Anat. Phys., 1875, p. 48 note. 



de Blainville, Osteogr., Psc. v., pp. 



27, 28 and 64. In the place cited, 



de Blainville gives C 9, D 16, L 3, S 6, C 9—11 as the normal, but he does not say 

 in how many specimens this formula was seen. I have therefore been unable to 

 tabulate this observation. It will be seen that D 16 is quite exceptional, but as it 

 occurred in the Coll. Surg, specimen no. 3422 it was described by Owen as the 

 normal, and this statement has been copied by many authors, perhaps by de Blainville. 

 5 Fourth lumbar ankylosed to sacrum by tr. proc. 



