264 PEOr. W. K. PAEKEE ON THE STETTCTUEE AND 



so that three months may be given as the full time required for the development of the 

 embi-yo, which is probably one third longer than is required in the case of the Brush- 

 Turkey {Talegalla). 



Bihliography^. 



1. Geat, J. E., F.R.S. — "Synopsis of recent Crocodilians," Trans. Zool. Soc. vol. vi. 



plates xxxi.-xxxiv. pp. 125-169. 



2. Huxley, T. H., F.R.S.— Elements of Comparative Anatomy, 1864, pp. 219-237. 



3. Huxley, T. H., F.R.S. — "On the Representatives of the Malleus and Incus of the 



Mammalia in the other Vertebrata," Proc. Zool. Soc. May 27, 1869, pp. 391-407. 



4. Huxley, T. H., F.R.S.— Anatomy of the Vertebrata, 1871, pp. 249-259. 



5. Mlvll, Prof. L. C. — Studies in Comparative Anatomy. No. 1. The Skull of the 



Crocodile. London: Macmillan and Co., 1878. 



6. Owen, Ricu.^ed, F.R.S. — " On the Communications between the Cavity of the 



Tympanum and the Palate in the Crocodilia," Phil. Trans. 1859, part 2. 



7. Owen, Richaed, F.R.S. — Descriptive Catalogue of the Osteological Series con- 



tained in the Museum of the Royal College of Surgeons of England, vol. i. 

 1853, pp. 151-167. 



8. Petees, Dr. W. H.- — " Das iiber die Gehorknochelchen und den Meckel'schen 



Knorpel bei den Crocodilen," Monatsbericht d. Berl. Akad. d. Wiss. 1868, 

 pp. 592-598, pi. 1. 



9. Rathke, Dr. Heineich. — Untcrsuchungen iiber der Entwickelung und den Kor- 



perbau der Krokodile. Brunswick, 1866. 



The skulls of other reptiles worked out by me (the Snake, Phil. Trans. 1878, part 2 ; 

 the Lizard, Phil. Trans. 1879, part 2 ; and the Green Turtle, ' Challenger ' Reports, 

 Zoology, vol. i. part 5) are not of themselves sufficient for comparison with that of the 

 Crocodile ; that of the Bird and of the Mammal are quite necessary before its meaning 

 and uses can be understood. 



Moreover, as the Sajropsida are built upon the foundation of the Amphibia and 

 Fishes (Ichthyopsida) it is before all things necessary that the skuU in one or the 

 other of those Branchiate types be taken as a measure or pattern with which to compare 

 that of this highly specialized Abranchiate form. 



For now, in the ascent of the types, the more or less ossified chondrocranium is 

 almost buried under the well-compacted framework of superficial bones, and the once 

 capacious respiratory pharynx is reduced to a funnel-shaped vestibule of the digestive 



' In this list I make no pretension to completeness. The -vrorks and papers are just such as served me in my 

 special research. 



Since this paper was read, an important memoir has appeared on the anatomy of the Crocodile, viz. 

 " Eeoherohes sur roreUle moyenne des Crooodiliens et ses communications multiples avec le pharynx," hy 

 Edouard van Bencden (Archives de Biologic, vol. iii. plates 20-22, pp. 487-560 : 1882). 



