18U9.] OSTEOLOGY OF THE PYGOrODES. ]i)Ao 



4. CouES, E. — 'l^lie Crania of Colymhus torqttaius and C. adamsi 



compared. Proc. Acad. Nat. Sci. Pliilad. vols, xvi.-xvii. 1864- 

 65, pp. 21-22. 



5. !Fuj{BniNGEE, M, — Uutersuch. zur Morphol. und Systemafc. 



der Vogel. II. AUgem. Theil, 1888. 



6. Gadoav, H.— Bronn"s Tluer-Eeich, Bd. vi. Ydge), 1891. 

 Aimloui. Theil. 



7. Gadow, H.— Ibid. Syst. Theil, lbi)'6. 



8. Gahrod, a. If.— Ou certain Muscles of the Thigh of Birds. 



P. Z. S. 1873 (Part I.), 1874 (Part II.). 



9. Huxley. T. H.— On the Classification of Bii'ds. P. Z. S. 



lb()7. 



10. LYijEtKER, E.— Cat. Toss. Birds Brit. Mus. 1891. 



11. Meckel. J. P.— Syst. der vergleich. Anat., Theil 2, Abtheil. ii., 



1825, p. 129. 



12. Mil^^e-Edwabds, a.— Kec-ierches pour servir a I'Histoire des 



Oiseaux Fossiles de la France, vol. i. pp. 278-;30U (1867-68). 



13. OwEX, E.— Todd's Cyclopedia of Anatomy, vol. i. pp. 286-7. 



14. Pycraft, W. p.— Contributions to the' Osteology of Birds 

 (Tubinares). P. Z. S. 1899, p. 381. 



15. Selenka, E. — Bronn's Thier-Eeich, Bd. vi. Vogel, 1891. 



Anatom. Theil, p. 83. 



16. SiiUEELDT, E. "W.— Concerning the Taxonomy of tiie North 

 America)] Pygopodes, based upon their Osteology. Journ. 

 Anat. & Physiol, vol. xxvi. 1892, pp. 199-203. 



17. Shufeldt, E. W.— Contributions to the Comparative Oste- 



ology of Arctic and Sub-Arctic Water-Birds, Part YI. Journ. 

 Anat. & Physiol, vol. xxiv. 1890, pp. 109-187. 



18. Shufeldt, E. AY. — Concerning some of the Forms assumed 



by the Patella in Birds. Proc. U.S. Nat. Mus. vol. vii. 

 1884, pp. 324-331. 



19. Thompson, D'Arcy.— On the Systematic Position of Besjoer- 

 ornis. Studies Mus. Zool. Dundee, 1890, voL i. art. x. p. 97. 



20. Yicq-d'Azyb. — Memoire sur les Eapports qui se trouvent 



eutre les usages et la structure des quatre extremites dans 

 rHomme et dans les Quadrupedes. Hist, de TAcad. Eov. 

 Sci. 1774, p. 201. 



EXPLANATION OF PLATE LXAIL 



tf/*-.=alisphenoi(l. ./■/.=floccular fossa. 



/>;;. = basitemporal platfui-ni. ./)•. = frontal. 



^.oc. = basioccipital. /^/^i'. = heiniplerygoid. 



6.s. = ba8isphenoid. ^/■. = lachrymal "foramen. 



I sr. = paras23henoidal rostrum. //;e. = meatus iutei-nus. 



f. = occipitai condyle. OTe5. = njesethmoid. 



c.jp. = cerebellar prominence. ?J. = na8al. 



e.r.== coronal ridge. «.p»2j7. = nasal process of premaxilla. 



(Z.=dentary. c>;3.o. = opi8thotic. 



e^.o. = epiotic. jy.=parietal. 



ex.o.=:exoccipital. j»«. = palatine. 



