Iiuh'aii Dcpp-^ea Drejhjiivj. 



X\ 



2."}. Lainprogrammus niger^ sp. n. 

 B. 8. D. circ. 110. A. ciic 90. C. 10? P. 17. \^ 0. 



Tissues fragile. Head Iar< 

 pressed and tapering. Tlie 

 head, the length of which 

 is abont one fifth of the 

 total, or slightly over half 

 the length of the entire 

 head and trunk in the 

 adult, or a little more than 

 the greatest body-height, 

 has the bones weak and 

 furnished with prominent 

 flexible crests, the inter- 

 vals between which form 

 wide and capacious muci- 

 parous cavities ; its only 

 armature is a flat inconspi- 

 cuous spine on the up[>er 

 part of the operculum. 



The snout, which is 

 broad and rounded, does - 

 not overhang the jaws ; its 

 length is slightly less than 

 the width of the convex 

 interocular space and 2\ ■ 

 times the diameter of the 

 circular eye, which last is 

 about one ninth the length ' 

 of the head. 



Mouth cavernous, with 

 oblique cleft and jaws 

 nearly conterminous in 

 front ; the maxilla, which 

 is much dilated poste- 

 riorly, is half the length 

 of the head. Villiform 

 teeth in broad bands in 

 the premaxillai and in very 

 narrow bands in the man- 

 dibles, palatines, and V- 

 shaped head of the vomer. 



Gill-openings very wide, 

 the gill-membranes not at- 



Ann. & Mag. N. Hist. jSer. 



body compressed, tail com- 



(3. Vol. viii. 



