26 Messrs. J. Wood-M ason and A. Alcock on 



No pyloric appendages ; no air-bladder. 

 Colour in life uniform blue-black. 



Two specimens, the larger of which is 2"6 inches long, 

 from Station 120, 240 to 276 fathoms. 



Malthopsis, gen. no v. 

 As Malthe, but with only two gills on each side. 



11. Malthopsis luteus, sp. n. (PI. VIII. figs. 2, 2 a.) 

 B. 5. D. 5. A. 4. C. 9. P. 11. V. 1/5. 



Head and anterior part of body much depressed, forming a 

 triangular wedge, the base of which is surmounted by a stout, 

 fluted and crenulated, projecting, spinous prolongation of the 

 snout, somewhat as in Malthe. 



Beneath this nasal prolongation is a deep narrow vault, 

 flanked on each side by a pair of large, almost confluent 

 nostrils, and containing a short, fleshy, clavate tentacle. 



Eyes large, lateral, nearly circular ; their diameter is about 

 one seventh of the total length, caudal not included ; they are 

 strongly convergent and anteriorly are barely half a diameter 

 apart ; the anterior limit of the orbit is in the same vertical 

 line with the anterior limit of the mouth. 



The mouth-cleft, which is horizontal, is about two thirds of 

 an eye-diameter in width. Teeth villiform, in bands in the 

 jaws and in broad patches on the vomer and anterior ends of 

 the palatines. 



Gill-cleft a small foramen, in width about one fifth of an 

 eye-diameter, situated superiorly in the axilla ; two gills ; 

 no pseudobranchiffi. Suboperculum prolonged and ending in 

 a stout trifid or multifid spine. 



Body covered with hard granular adherent plates, each 

 with a large radially-striated conical tubercle in its centre. 

 On the dorsal surface of the cephalic disk they are of mode- 

 rate size, in contact along the middle line, but distant and 

 slightly sunken laterally ; on the ventral surface of the 

 cephalic disk they are small, distant, and sunken ; on the 

 rest of the trunk and tail they are large and in close contact 

 throughout. 



The form and disposition of the fins is as in Malthe ] the 

 ventrals are very long, nearly equal to the pectorals, which 

 are equal to the caudal, which is two ninths of the total. 



A large siphonal stomach is found, and a wide coiled intes- 

 tine, opening widely in the middle line between the axillas. 

 No pyloric ca^ca j no air-bladder. 



