BONES OF LOPHIUS PISCATORIUS — MORROW. 347 
37. Epihyals: these bones are long. At their posterior ex- 
tremities they are narrow and curved inwards and upwards 
towards their junction with the stylohyals. They widen out at 
their anterior extremities, where they present themselves as thin 
bony plates. On their upper inner anterior edges there is on 
each a splint, which unites it with its 
38. Ceratohyal: these, which are comparatively very long 
bones, have at their superior anterior extremities processes 
which connect them with the epihyals, giving to them 77 situ the 
appearance of having thickened superior edges. The Ceratohyals 
on their lower posterior extremities present the same thin edges 
and of equal width with the epihyals. In the anterior third of 
their length, midway in these bones, on the outer side, is a groove 
for the reception of part of the branchiostegal rays, of which two 
on the inner side of the bones are the anterior, and four on the 
groove mentioned the posterior. At about half their length on the 
superior surfaces there is on each of these bones a process for their 
attachment by ligament to the angulars and dentaries, and at 
this point the bones are twisted so that their inferior are nearly 
at right angles to their superior extremities. 
39, 40. Basihyals: these bones, two on each side form the 
base of the hyoidean arch; in the ape: they are of irregular 
shape, and the upper pair present long posterior processes which 
unite them by sqamuous suture to the inner side of the cerato- 
hyals at their upper anterior extremities; the lower pair are 
small, thin and somewhat triangular plates, which are attached 
to the lower anterior extremities of the ceratohyals. In the 
Cod the lower pair are much the larger bones. 
41. The glossohyal, which lies between the basihyals and the 
42. Urohyal, which is directly beneath it, are both extreme- 
ly small bones. 
43. The branchiostegals are very long and thin bones. There 
are six on each side, and in the absence of ribs they serve to form 
the large abdominal cavity of the Lophius. 
53. There are in the Lophius no representatives of the basi- 
branchials.* 
*T have not yet found any; but will make further examination as soon as a new 
specimen is obtained. 
