122 Part III. — Tiventy -sixth Annual Report 



thin verticle lamina oa the parietal in saida; on the frontal it is merely a 

 ridge. It rises, but is very low, on the frontal in callarias. 



The hind end of the squamosal is very broad, its upper and lower 

 edges are almost parallel, in aeglefinus. The two edges approach one 

 another rapidly as they proceed posteriorly in callarias, virens, pollachins, 

 merlangus. 



A^ibw from Above. 



The shape of the frontal is of some importance. It tapers much at its 

 anterior extremity in callarias, virens. 



It is rounded in front in seglefinus (fig. 9), pollachius, merlangus (fig. 

 1 6), luscus, minutus, esmarki. 



The middle foramina of the frontal are well separated from the anterior 

 opening of the supra-orbital groove in callarias, ogac (fig. 19), teglefinus, 

 virens, pollachius. 



The foramina and the openings come close together in luscus, minutus, 

 merlangus, poutassou (fig. 14), argenteus (fig. 20), saida (fig 13). They 

 come very close together in the last species. 



There are characteristic differences in the shape of the pre-frontals. 

 As a rule their lateral edges slope backwards and outwards, e.g., in 

 callarias, ogac, jeglefinus, virens, pollachius, poutasscu. 



In the following the pre-frontals project broadly from the side of the 

 skull : — Luscus, minutus, esmarki, saida, argenteus. In argenteus the pre- 

 frontals project anteriorly as broad plates (fig. 20). 



The foramen of the nervus lateralis (for., fig. 9) is associated with a 

 projecting plate (pre, ib., fig. 16) of the parietal. 



The plate covers the foramen : the plate is very large in pollachius, 

 luscus. 



The plate covers the foramen : the plate is a prominent process in 

 callarias, merlangus. 



The plate covers the foramen : the plate is long and comparatively 

 narrow in minutus, esmarki, poutassou. 



The plate covers the foramen : the plate is present as a very small ridge 

 in saida. 



The foramen is in front of (fig. 9) or on top of the process (fig. 19), 

 which is very small, in ajgiefinus, ogac. 



The ridge is absent in argenteus. The parietal is largely cartilaginous, 

 and the foramen seems to pierce the parietal on top and anterior to the 

 position usually occupied by the ridge in other Gadids. 



In minutus the process was sometimes pierced on top by a foramen : 

 the foramen of the nervus lateralis was covered by the process. 



View from Below. 



The opisthotics are swollen, rounded, with the parasphenoid depressed 

 between them, in poutassou, saida, argenteus, minutus, esmarki. 



The groove in the hind part of the parasphenoid, i.e., between the 

 articulations of that bone with the opisthotics, is very slight in virens, 

 ogac. 



The groove is well marked in aeglefinus, merlangus, luscus, minutus, 

 saida, esmarki, poutassou, argenteus. 



The hind part of the parasphenoid is flat, or slightly convex, in 

 callarias, pollachius. 



Callarias and Ogac. 



The skull of ogac which I was able to exainiue, was damaged in the 

 occipital spine, squamosals, opisthotics, and ex-occipitals, but it was 



