340 BONES OF LOPHIUS PISCATORIUS — MORROW. 
ON THE Bones or “ LopHIuS PISCATORIUS,’—ANGLER FIsq, 
Devit Fisu, GoosE Fisu, &c., &. 
(Read 13th Feb’y. and 8th May, 1882.) 
1. BEGINNING with the frontal bone. You will notice that in 
this fish it is divided by a serrated suture into two parts, each 
having on its outer edge a peculiar dentated margin ; looking at 
the two parts as one bone, its central upper surface is depressed, 
and at about two-thirds of the length from the anterior ends it 
has two so-called spines on each outer edge. 
2. The prefrontals of this fish, when compared with those of 
the Cod, have the appearance of being reversed, the side which 
is down in the Lophius appears to be uppermost in the Cod, this 
is in consequence of the attachment of the palatine bone to the 
anterior edge of the prefrontal, so that the palatine bone, with its 
teeth, follows nearly the line of curvature of the premaxillary. 
The long arms of the prefrontals are attached to the frontals un- 
derneath their outer anterior margins, and are largely supple- 
mented with fibro-cartilage, extending between the anterior forks 
of the frontals. 
3. The ethmoid is absent. 
4. Post-frontals—each has upon it two short spines, and on 
its outer edge, between the spines, two depressions, the anterior 
the largest, and on its under side, at about the middle of the 
anterior depression, the bone forms an angular ridge, above the 
anterior edge, and in advance of which lies the orbitosphenoid. 
5. The basioccipital, at its under posterior extremity, is wide, 
owing to the presence of thin bony plates for its attachment to 
the exoccipitals, and is somewhat contracted at its anterior ex- 
tremity. 
6. The basisphenoid is a much broader bone than that of the 
Cod, and has upon its lower side two arms projecting upwards 
and posteriorly, the wings being attached to these arms, and 
reaching nearly to the anterior extremity of the presphenoid. 
The vomer is inserted in a cavity within the presphenoidal por- 
tion of this bone. 
A. Between the parietals and the posterior extremities of the 
frontals, lies a bone somewhat oval in shape and depressed in its 
