242 EDWARD PHELPS ALLIS, JR. 
In sections immediately anterior to those that cut through 
the nervous stalk of the hypophysis, the median ridge on the 
dorsal surface of the parasphenoid extends upward to the mem-_ 
branous floor of the cavum cerebrale cranii, and so occupies 
the position of a basisphenoid, which bone is said by Sagemehl 
to be absent in all of the Cyprindidae. A slight line separates 
this projecting process from the remainder of the parasphe- 
noid, vaguely suggesting a fusion of two bones. 
BLENNIUS GATTORUGINI 
In Blennius gattorugini I described (’09) a myodome, the roof 
of which was said to be formed by membrane. This is correct, 
but it was also said that this membrane was attached, on either 
side, to the dorsal edge of a groove on the ventral edge of the 
prootic, and that that edge which represented the horizontal proc- 
ess of the bone. This is incorrect, for, on reexamining my mate- 
rial, I find that this groove simply lodges the related portion of the 
lateral edge of the parasphenoid and that the membrane repre- 
senting the horizontal processes of the prootics is attached to 
a slight ridge on the side wall of the cranial cavity at a some- 
what higher level, in direct posterior continuation of the line 
of the horizontal portion of the basisphenoid. The cavity thus 
formed lodges the recti externi only, and hence represents the 
dorsal compartment of the myodome. Having no sections 
of this fish, the arteries, veins and nerves, and the myodomic 
membranes could not be properly traced, but the conditions 
are apparently similar to those in Hippocampus, above de- 
scribed. Starks (’05) says that in six genera of the Bleniidae 
examined by him there was no myodome. 
ARGYROPELACUS 
In Argyropelacus a myodome is frequently referred to by 
Handrick (’01), but not particularly described, and I made 
brief reference to it in my work on the mail-cheeked fishes. 
The neurocranium of this fish is said by Handrick to be wholly 
of cartilage, no bone being found in any part of it, and the my- 
odome lies external to this chondrocranium. Its hind wall is 
