514 MOODIE. [Morse 
nomenclature here proposed, it 1s hoped, does not depart widely 
from that given by Allis for Amia (8). The supraorbital 
(Fig. 1 “d”) and infraorbital (Fig. 1 “c’) canals are readily 
correlated with the canals of the same name in the fishes. The 
anterior commissure (Fig. I “a’) is also homologous with 
that of fishes, as is also the canal which is here called the 
Fic. 1—A diagram of the lateral line canals in the Stegocephala. 
a, anterior commissure; b, antorbital commissure; c, infraorbital canal; 
d, supraorbital canal; e, temporal canal; f, jugal canal; g, occipital cross- 
commissure, 
E, epiotic; F, frontal; J, jugal; L, lachrymal; Mx, maxilla; P, parie- 
tal; Pf, postfrontal; Po, postorbital; Pr, prefrontal; Prs, supratemporal ; 
Px, premaxilla; Qj, quadrato-jugal; So, supraoccipital. 
“antorbital commissure” (Fig. 1 “b’.). The others: are- not 
so readily homologized. The upper canal in the posterior 
part of the cranium is here designated the “temporal canal” 
(Fig. 1 “e’). It is, however, clearly a part of the infraorbital 
canal of the fishes. Its relations in the Stegocephala are 
such that a new name is deemed necessary, for otherwise the 
canal would have to be referred to by the circumlocution: 
“the upper posterior portion of the infraorbital canal.’ For the 
