538 PROCEEDINGS OF THE NATIONAL MUSEUM vol.86 



XX. Interorbital width about iVs; eye 7 in head M. unicornis 



c. Dorsal III, 10-11; origin nearer end of snout than base of 

 caudal; frontal crests each with a prominently projecting 

 horizontal spine anteriorly; caudal peduncle about 2}i 

 times as long as deep; head 2}i to 2% in length without 

 caudal M. triceratops 



Named in reference to the rough and spinous nature of the head. 



Order PEDICULATA 

 Family ONEIRODIDAE 



Genus ONEIRODES Liitken, 1871 



ONEIRODES BULBOSUS. new species 



Figure 70 



Holotype. — A specimen 57 mm in length without caudal, from 

 station 1109C, taken March 11, 1934, latitude 53°50' N., longitude 

 133°54' W. (about 25 miles WSW. of Frederick Island, one of the 

 Queen Charlotte Islands), U.S.N. M. no. 108149. 



Description. — The body and all it appendages, except the bulb of 

 the illicium, are jet black. The form is deep, wide, and nearly bulb- 

 shaped. The greatest depth (at a vertical from in front of the iso- 

 lated dorsal ray) is equal to the breadth of the fish between the down- 

 ward projecting spines at the posteroventral corner of the opercular 

 apparatus. The sphenotic spines are well developed. They project 

 from the surface of the head to a height a little greater than the dia- 

 meter of the tiny eye. They arise at a vertical well behmd the eye. 

 The cheek is a large roughly triangular concavity formed by a ridge 

 running from tliis spine down along the preoporculum and the upper 

 jaw. A little above the center of this concavity the tiny eye projects 

 from the skui to a height equal to its diameter. Between the two 

 sphenotic spines there is a large, deep concavity that extends from be- 

 hind the level of those spines to the basal bone of the ilhcium. At the 

 level of the sphenotic spines tlds cavity is 7 mm wide and 5 mm deep 

 (8.1 and 11.4 in the length without caudal respectively). The bottom 

 of the cavity is a dark brown, distinctly lighter than the rest of the 

 body. The walls of the cavity are formed by the frontal bones. The 

 upper and lower jaws are both heavy. The former extends back to a 

 vertical between the eye and the sphenotic spine; the latter projects 

 slightly and is provided with a rounded mental knob. Posterior to 

 the corner of the mouth, and below its level, there is a sharp stout 

 spine of about the same size and shape as the sphenotic spme, wliich 

 projects outward and downward at an angle of about 80° with the 

 head. Below this there is a broad, heavy, flat, triangular spine, wliich 

 projects downward at the posteroventral corner of the opercular appa- 

 ratus nearlv to the ventral outline. 



