294 ON THE SUPPOSED CLAVICLE OF DiPLoDocus. [June 6, 
~The existence of clavicles in Dinosauria must therefore still be 
considered doubtful. 
In conclusion, I wish to express my thanks to Mr. Boulenger, 
Dr. Forsyth Major, Mr. Pycraft, and Dr. A. 8. Woodward at the 
British Museum, and to Professor Stewart and Mr. R. H. Burne 
at the Royal College of Surgeons, for their kind help in studying 
so intricate a question. 
Literatwre. 
Gapow & SELENKA.—Birds: Bronn’s Klassen und Ordnungen d. 
Thierreiches, vol. vi. part iv. 
Gitper.—‘‘ Das Os priapi der Siiugethiere.” | Gegenbauer’s 
Morphologisches Jahrbuch, 1891. 
Harcupr. — “‘ Diplodocus carnegii.’ Memoirs of Carnegie 
Museum, Pittsburg, vol. 1. 
——. ‘“Osteology of MHaplocanthosaurus, with Appendix on 
Diplodocus.” Loc. cit. vol. 1. 
[ Norcsa. |—Critical Review of Hatcher’s Paper on Haplocantho- 
saurus. Keilhack’s Geologisches Centralblatt, 1904. 
Weser.— Die Saugethiere. Leipzig, 1903. 
Wrepersuemm.—-Lehrbuch der vergleichenden Anatomie d. 
Wirbelthiere. Leipzig, 1902. 
