6 MR. W. K. PARKER ON THE STRUCTURE AND 



4. "On the Sturgeon's Skull." M. Micr. Jour., June 1, 1873, pp. 254-257; 

 plate 20. 



5. " On the Skull of the Batrachia." Phil. Trans., 187G, Part II., pp. G02-6G9 ; 

 Plates 54-62. 



6. "On the Skull of the Urodeles." Phil. Trans., 1877, Part I., pp. 529-597; 

 Plates 21-29. 



7. "On the Skull of Sharks and Skates." Trans. Zool. Soc, vol. x., part iv., 



1878, pp. 189-234 ; plates 34-42. 



8. " On the Skull of the Urodeles." Trans. Linn. Soc, ser. 2, Zool., vol. ii., 



1879, pp. 165-212 ; plates 14-21. 

 SwiNHOE, Robert, H.M. Consul, Formosa. " On Reptiles and Batrachians from 



China." Proc. Zool. Soc, 1870, pp. 409-412. 

 Traquair, Ramsay, M.D. 



1. "On the Osteology of Pohjpterus." Jour, of Anat. and Phys., vol. v., 

 pp. 166-182 ; plate 6. 



2. ' On Ganoid Fishes ' (Palteoniscidfe). Palseont. Soc, 1877, pp. 1-60 ; plates 1-7. 

 Wallace, Alfred Russel, Esq., F.L.S. 'The Geographical Distribution of Animals.' 



London: Macmillan and Co., 1876. Pp. 414-423. 

 Wiedersheim, Dr. R. 



1. ' On Salamandrina persjnciJlata siad Qeotriton fusciis.' Genoa: 1875. 



2. ' Das Kopfskelet der Urodelen.' Leipzig: 1877. 



3. " On Lahyrinthodon Eiitimcyen." Abh. der Schwerz Palfeont. Gesell., 

 Zurich, 1878. 



/ 4. " Zur Anatomie des Amhlystoraa Weismanm. Zeitschr. f Wiss. Zool., 



''- bd. xxxii., pp. 216-236 ; plates 11, 12. 



f 5. '■ Die Anatomie der Gymnophionen.' Jena: 1879. 



/ Wilder, Professor Burt. G. " The Branchice of the Embryo Pipa." ' The American 

 Naturalist,' July (or August), 1877. 



Zoologiccd list of the species whose skulls are described or referred to" in the 



present paper. 



In drawing up this list I shall make free use of the labours of my friends, 

 Dr. A. GtJNTHER, F.R.S., and Professor St. George Mivart, F.R.S. The " Batrachia 



* The species, the descriptions and illustrations of whose skulls are referred to here, and only partially 

 described, are : — 



1st, Rana temporaria (see Phil. Trans., 1871, pp. 137-211, Plates .3-10; and Phil. Trans., 187G, 

 pp. 603-605, Plate 54, figs. 1, 2). 



2nd, Bana esculenta (see Huxlky, article "Amphibia," Encyc. Brit., 9th Edit., vol. iii., pp. 750-771). 



3rd, B^ifo vulgaris (see Phil. Trans., 1876, pp. 605-625, Plates 64, 55). 



4th, Bactylethra capensis vel Icevis (see Phil. Trans., 1864, pp. 625-648, Plates 56-59). 



5th, Pipa Americana vel monstrosa (sec Phil. Trans., 1864, pp. 648-665, Plates 60-62). 



