FISHES. — MCCULLOCH. 87 



Family ARGENTINID^E. 



Genus Argentina, Linnmts. 



Argentina elongata, Rutton. 



Argentina elongata (Hutton), McCulloch, Zool. Results 

 " Endeavour," i., pt. 1., 1911, p. 18. 



A single specimen from eighty miles west of the meridian of 

 Eucla, Southern Australia, is of interest as showing that this 

 species occurs in Western Australian waters. It was trawled 

 in 80-120 fathoms. 



Family STERNOPTYCHID^E. 

 Genus Polyipnus, Gunther 



POLYIPNUS TRIDENTTFER, sp. 110V. 



(Plate xvi. ; Fig. 4.) 



D. 13-14; A. 17-18; P. 13; V. 7; C. 19. Height of body 

 1.60-1.67 in the length to the hypural ; head, from tip of upper 

 jaw to operculum, 3.2-3.26 in the same. Eye 5.52-5.88, pectoral 

 fin 3.54-3.67, highest dorsal ray 3.54-3.67 and highest anal 

 ray 4.92-5.25 in the length. Depth of caudal peduncle 1.78-1.80, 

 and longest gill-raker 1.78 in the eye. 



General form similar to that of P. niittingi, Gilbert, though a 

 little more elongate posteriorly. The crests defining the inter- 

 orbital space are finely denticulated, and form, near their hinder 

 ends, a more or less distinct process with spines pointing forwards 

 and backwards. The post-temporals end in three very large 

 spines on each side, of which the tipper is the longest, and the 

 lower one is bent downwards ; the middle one is a little smaller 

 than the others. The preopercular angle is armed with a strong 

 spine, near which the margins of both limbs are a little serrated. 

 Cleft of month vertical. Both the maxillary and mandible are 

 very broad. The inferior mandibular margin is a little serrated, 

 and the lower angle is formed by a broad spine. Anterior 

 margin of the maxillary sloping forward when the mouth is 

 closed, and forming a sharp angle with the inferior one which 

 may be a little hooked ; inferior margin granular. A broad 

 supplemental bone is present with a smaller scale-like lamella 

 overlying its upper portion. Premaxillaries granular exteriorly, 

 with a series of depressible teeth which are in two rows 

 anteriorly. Mandibular teeth similar. Vomer with several 

 irregular, longitudinal rows of small depressible teeth, and there 

 may be one or two small ones on the anterior end of the pala- 

 tines. 



