328 ROY L. MOODIE 
skulls and occur only as cutaneous structures.'® It is probably 
this latter condition which obtained in the young of Trematops 
and Cacops. 
BIBLIOGRAPHY 
A bibliography on the correlation of the lateral line system in Amphibia 
and fishes, supplemental to that contained in the author’s previous paper (’08). 
Anus, E. P. 1889 The anatomy and development of the lateral line system in 
Amia calva. Jour. Morph., vol. 2, pp. 463-540, pls. 30-42. 
1900 The lateral sensory canals of Polypterus bichir. Anat. Anz., 
vol. 17, p. 23. 
CouuincEe, W. E. 1893 Note on the lateral canal system of Polypterus. Proce. 
Birm. Phil. Soc., vol. 8, part 2, pp. 255-262. 
Fraas, E. 1913 Neue Labyrinthodonten aus der Schwibischen Trias. Paleon- 
tographica, Bd. 60, pp. 275-294, figs. 1-5, pls. 16-22. 
Herrick, C. Jupson 1901 The cranial nerves and cutaneous sense organs of 
the North American siluroid fishes. Jour. Comp. Neur., vol. 11, no. 
3, pp. 177-250, with plates and bibliography. 
McMvreicnu, J. Puayrarr 1884 The osteology of Amiurus catus. Proc. of 
the Canadian Inst. Toronto, N. S., vol. 2, p. 279. 
Moopir, Roy L. 1908 The lateral line system in the extinct Amphibia. Jour. 
Morph., vol. 19, p. 511-540, figs. 1-17, with bibliography. 
1913. The Pennsylvania amphibia of the Mazon Creek shales. vans. 
Univ. Sci. Bull., vol. 6, no. 2, pp. 330-336, pls. 1-14. 
Prityer, AtBert 1914 Beitrige zur Kenntniss der Seitensinnesorgans und 
Kopfanatomie der Macruriden. Jenaische Zeit. f. Naturwissenschaft, 
Bd. 52, pp. 1-133, with taf. 1-2, 38 figures and bibliography. 
Pouuarp, H. B. 1892 On the anatomy and phylogenetic position of Polypterus. 
Zool. Jahrb., Bd. 5, h. 3-4, pp. 387-428. 
Traquair, R. H. 1870 The cranial osteology of Polypterus. Jour. Anat. and 
Physiol., 2nd ser., no. 7. 
Wrian, Cart 1914 Uber die Stegocephalen aus der Trias Spitzbergens. Bull. 
of the Geol. Instit. of Upsala, vol. 18, pp. 1-34, with figs. and 9 photo- 
graphic plates. 
16 Of course, in this statement it is not intended to imply that the lateral 
line canals arose earlier in the phylogeny than naked lateral line sense organs. 
The converse is probably true, for the canals are lacking in cyclostomes, though 
naked sense organs of this system are present. In the terminal phyla of the 
Ichthyopsida the lateralis system is undergoing reduction and a return to the 
most primitive condition of naked sense organs. 
