538 MOODIE., [VoL. XIX. 
pitals of the Stegocephala are homologous with the supra- 
temporal elements of the fishes. The quadratojugal is homol- 
ogous with the subopercular of fishes. The supratemporal 
(prosquamosal) is homologous with the preoperculum of 
fishes. 
I am indebted to Dr. Katashi Takahashi for several inter- 
esting suggestions in regard to the lateral line system of the 
modern Amphibia and more especially Necturus. Dr. S. W. 
Williston has, with his usual kindness, read the manuscript 
and has offered interesting suggestions. [I am indebted to 
him likewise for the use of the material on which the greater 
part of this discussion is based. To Dr. Bashford Dean I 
am grateful for the loan of the large part of the Newberry 
collection of Carboniferous Amphibia belonging to the Ameri- 
can Museum. 
BIBLIOGRAPHY. 
1. Coxtince, W. E., 1894. The Sensory Canal System of Fishes. Part 
I,- The ‘Ganoidei.» Q.J.. M.-S., Vol: XXXCV 1, PE 4 pps 400-se5 
Pls. 39-40. 
M’DonneELL, Ropert, 1862. On the System of the Lateral Lines in 
Fishes. Trans. of the Royal Irish Academy, Vol. XXIV, pp. 
161-183, Pls. 4-7. 
3. Parker, G. H., 1903. The Sense of Hearing in Fishes. American 
Naturalist, Vol. XXXVII, pp. 185-204. 
Parker, G. H., 1903. Hearing and Allied Senses in Fishes. Bulletin 
of the U. S. Fish Commission for 1902, pp. 45-46, Pl. 9. 
Parker, G. H., 1904. The Function of the Lateral Line Organs in 
Fishes. Bulletin of the Bureau: of Fisheries, Vol. XXIV, pp. 
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4. Dean, Basurorp, 1901. Further Notes on the Relationship of the 
Arthrognathi. Memoirs of the New York Academy of Sciences, 
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Polypterus. Zool. Jahrbiicher, Bd. V, pp. 387-428, Pls. 27-30. 
Pottarp, H. B., 1892. The Lateral Line System in Siluroids. Zool. 
Jahrbiicher, Bd. V; Anat. Heft, 3 and 4; pp. 525-549. 
6. Baur, Georce, 1896. The Stegocephali. Anatomischer Anzeiger, Bd. 
XI, No. 22, pp. 657-671. 
7. Attis, Epwarp P., 1899. On certain Homologies of the Squamosal, 
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Anatomischer Anzeiger, Bd. 16, Nos. 3 and 4, pp. 49-72. 
tN) 
