106 



Proceedings of the Royal Irish Academy. 



Koehler (1896), Brauer (1906), Uolfc and Byrne (1910), Murray and Hjort 

 (1912). 



Macrurus atlanticus, Lowe (1839), Giinther (1862), Zngmayer (1911). 



Coelorhynclms atlanticus, Go&de and Bean (1895). 



Coelorhijnchus coelorhyiwhus, Gilbert and Hubbs (1916), Eoule (1919). 



(Plate Vll, fig. 2.) 



Coelovhynchus coehrhynchus (after Holt and Calderwood) 



Description. — Head pointed, flattened below, the infra-orbital ridge form- 

 ing a well-marked division between the lower surface and the rest of the 

 head. Snout moderately elongated, a little shorter than or equal to the eye. 

 Profile of the head slightly convex, meeting the infra-orbital ridge at the 

 extremity of the snout at an angle of about 50'. Head completely covered 

 with small scales which are easily detachable and are set with numerous 

 irregular rows of small blunt spinules. Excepting the sub-orbital ridge, the 

 ridges on the head are not well marked, but they are distinguishable by the 

 larger size and regularity of the scales which they bear. They consist of 

 a median ridge running from between the eyes to the tip of the snout and, 

 on each side of the head, a supra-orbital running from above the gill-cover to 

 above the eye, where it divides, one branch following the orbit for a short 

 distance and then terminating, the other descending in front of the nostril to 

 the infra-orbital ridge. On each side of the occipital region a ridge runs 

 from above the eye, close to the supra-orbital ridge, to the back of the head. 

 The space between the supra-orbital and occipital ridges has a median row of 

 moderately large slightly keeled scales, which have the appearance of a faint 

 ridge continuous with the anterior end of the lateral line. The tip of the 

 snout projects to form a small spinulose process, usually trifid, but sometimes 

 bifid. 



Outline of the body rising slightly from the head to the front of the first 

 dorsal fin. The rise is gradual and continuous with the profile of the head in 

 small specimens, but is somewhat abrupt in large individuals. The body is 



