342 BONES OF LOPHIUS PISCATORIUS — MORROW. 
11. The alisphenoids of the Lophius are largely supplemented 
with fibro-cartilage, in their attachment to the adjacent bones, 
and they are comparatively flat on their upper surfaces. 
12. The mastoids, which are deep, short bones, together with 
the prefrontals, form the seat of the hyomandibulars ; upon each 
there is a spine, and the points projecting from the outline of the 
skull are quite short. 
13. In the Lophius I cannot find the squamosal. 
14. The orbitosphenoids are extremely small and delicate 
membrane bones which lie beneath the posterior extremities of 
the frontals, immediately in front of the post-frontals; in their 
structure they are very beautiful. 
16. The vomer has, in the one exhibited, at present only two 
teeth, one in each extremity or arm, but it may have had at one 
time three on each arm, most probably only two at the same 
time ; the large skeleton before you has, as you will observe, 
two teeth on each arm. On its upper side, curved backward 
from the teeth, the vomer has a projecting bony plate forming 
a groovefor the reception of the prefrontals, and its posterior 
extremity, as already stated, is inserted in the cavity of the pre- 
sphenoid. 
17. The inter or premaxillaries are armed on their anterior 
edges, to their extremities with a row of teeth; those near the 
median line being five or six long teeth of a character similar to 
those on the dentary, the remainder are small but gradually in- 
crease in size toward the extremity of the bone. On their pos- 
terior edges there is a row or rows of teeth extending about half 
the length of the bones, and speaking generally, decreasing in 
size from their superior extremities. These bones are from the 
enormous size of the gape, long and somewhat thin plates ; from 
their saperior extremities gradually narrowing for about half 
their length, their breadth then increases and they terminate in- 
feriorly in a somewhat (posteriorly) seymeter shaped edge. The 
processes for their attachment to the maxillaries and nasal bones 
are flat, and in a line following the general line of the top of the 
skull, but their extremities are oblique, receding from the central 
line. 
