Pisces. 



i8i 



6. Trematomus beenacchii, sp. n. 



(Plate XIV.) 



Depth of body 3^ to 4 times in total length, length of head 

 3^ to 4 times. Diameter of eye 3^ to 4 times in length of head, 

 interorbital width 5 to 5^- times ; maxillary extending to below- 

 anterior third or centre of eye ; lower jaw not projecting beyond the 

 upper ; cheek, opercle, and occiput densely scaled ; interorbital 

 region naked or with a few scales ; openings of sensory canals on 

 head large. Gill-rakers short, 13 to 15 on lower part of anterior 

 arch. Dorsal IV-VI,^ 35- 38 ; longest rays about ^ length of head. 

 Anal 32-35 ; longest rays about \ length of head. Pectoral rounded, 

 § length of head, reaching origin of anal or a little beyond. Ven- 

 tral I to I length of head. Caudal rounded. Caudal peduncle 

 deeper than long. Scales 66-80 ^^ ; upper lateral line 31-40, 

 lower usually formed of a series of pits or reduced to a few tubular 

 scales. Brownish, lighter beneath, with large dark spots, usually 

 forming two or three alternating series on the side ; fins grey, ujDper 

 half of anterior dorsal black or blackish. 



Total length, 250 mm. 



Thirty-nine specimens from Cape Adare, 5 to 8 fathoms, and 5 

 from Duke of York Island, 3 to 4 fathoms. 



Measurements and numbers of fin-rays and scales in some of the 

 specimens : — 



' Usually V. 



