collected during the Voyage of the ' Challenger,'' 19 



Haloporphyrus atistralis. 

 D. 9 I 50-52. A. 53. V. 8. 



This species is in general appearance similar to Halopor- 

 jjhyrus lepidion, but has a shorter and stouter body. The 

 length of the head is one fourth of the total without caudal, 

 the depth of the body two fifths. 



Puerto Bueno, Magellan Straits, 55-70 fathoms. 



Melanonus, g. n. Gadid. 



Head and body rather compressed, covered with cycloid 

 scales of moderate size, and terminating in a long tapering 

 tail, without caudal. Eye of moderate size ; mouth anterior 

 and lateral ; both jaws with narrow bands of villiform teeth ; 

 vomer and palatines with very narrow stripes of minute teeth. 

 Barbel none. One short anterior dorsal ; the second com- 

 mences immediately behind the first, and has the anterior 

 rays well developed ; it is continued to the end of the tail. 

 Anal like the second dorsal. The outer gill-rakers of the 

 first branchial arch strong and long, longer than the gill- 

 larainie. Ventrals composed of several rays, slightly in ad- 

 vance of the pectorals. Bones flexible ; mucous cavities of 

 the head small. 



Allied to Strmsia, but with different dentition. 



Melanonus gracilis. 

 Entirely deep black. 

 Antarctic (Station 156), 1975 fathoms. 



Lotella marginata. 

 D. 7-8 I 65. A. 62. V. 5. 



Head of moderate length, two ninths of the total, the caudal 

 fin not included. Eye very large, more than one third of the 

 length of the head, and equal to that of the postorbital por- 

 tion ; consequently the snout is short, though its length much 

 exceeds the width of the interorbital space. The maxillary 

 extends only to below the middle of the eye ; jaws with an 

 outer series of distinctly larger teeth. Barbel very small. 



Pacific coast of South-western South America (Stations 

 305-308), 120 to 345 fathoms. 



Siremho Messier i. 



Head oblong, deeper than broad, the snout being rather 

 produced, rounded, overlapping the lower jaw. Eye of mode- 



2 



