Pisces. 187 



the vent, its length nearly twice its distance from the head ; longest 

 rays \ to \ length of head. Anal 24-26, originating below sixth or 

 seventh ray of dorsal ; rays nearly as long as dorsals. Pectoral 

 rounded, suhtruncate behind, -|- to f length of head, not reaching vent. 

 Ventral a little shorter than pectoral. Caudal truncate. Caudal 

 peduncle 1|- to If as long as deep. Lateral lines appearing as tubes 

 or pits in a series of small scales embedded in the skin ; the upper 

 extends from the gill-opening to about the vertical of the origin of 

 the dorsal, the lower from below the extremity of the upper to the 

 root of the caudal fin, running along the middle of the caudal region. 

 Brownish olive, belly whitish ; more or less distinct irregular dark 

 brown spots on the head, back, and sides of the caudal region ; fins 

 greyish. 



Total length, 300 mm. 



Five specimens were obtained at Cape Adare, in 4 to 8 fathoms, 

 in April and November, 1899. 



This curious fish has been noticed by Bernacchi, ' To the South 

 Polar Piegions,' p. 209^ and a photograph of it is given in Borch- 

 grevink's book, p. 113, middle figure. 



LEPTOSCOPIDAE. 



PLEURAGRAMMA, gen. n. 



Body rather elongate, compressed, covered with large, thin, cycloid 

 scales ; lateral line absent. Snout flattened, but not spatulate ; mouth 

 large, with bands of villiform teeth ; a pair of canines at the prae- 

 maxillary symphysis ; lateral mandibular teeth in a single series, 

 unequal in size ; palate toothless. Opercle ending in a point ; no 

 spines on the head. Gill-membrane free ; pseudobranchiae present ; 

 l)ranchiostegal rays six. Two distinct dorsal fins, the first short and 

 formed of slender simple rays, the second, as well as the anal, long. 

 Skeleton feebly ossified ; suborbital chain very slender ; scapular 

 fenestra in the scapula ; vertebrae 19 + 34, praecaudals without 

 parapophyses. 



14. Pleuhagkamma antakcticum, sp. n. 



(Plate XVIII.) 



Depth of body about 5 times in total length, length of head 3|- 

 times. Snout flattened above, with feeble bony ridges, nearly as long 

 as the eye, the diameter of which is contained 3 or 3;^ times in length 



