59] THE NASAL ORGAN IN AMPHIBIA—HIGGINS 59 
externa to other parts of the capsule; although differing in their relations 
to each other, and in their position.in the capsule, their homology is very 
evident. The ventral of these two bars is the cornu trabecula, more slender 
and cylindrical in Pipa; while in Bufo it is greatly reduced in length, con- 
siderably broader and has been designated in this paper as the solum 
anterius. The junction in both groups of this cartilage with the alinasal 
cartilage is a further,evidence of their homology. The dorsal of the two 
bars, above mentioned, is apparently an additional structure in the Anura, 
for I do not recognize it in any Urodele. The term oblique cartilage seems 
to best designate this bar, extending, as it does, obliquely forwards and 
upwards from the lamina externa to the planum tectale, or as in Pipa to 
the tip of the planum verticale. 
