32 Messrs. J. Wood-Mason and A. Alcock on 



21. ParadicroJene multifilis, Alcock. 



Paradicrolenc multifilis, AAcock, Aun. & Mag. Nat. Hist., Nov. 1889, 

 p. 387. 



Several small specimens, slightly differing in unimportant 

 characters — e. cj. in the colour of the body, which is much 

 darker — from the type, were taken at Station 120, 240 to 276 

 fathoms. 



Dermatokus, Alcock. 

 22. Dermatorus melanocephalus , sp. n. 



This species is very closely allied to Dermatorus trichiurus 

 from the Laccadive Sea (Ann. & Mag. Nat. Hist., Oct. 1890, 

 p. 298), from which it differs in the following points : — 



All the spines of the head-bones ai-e weak and flexible ; the 

 opercular spine is broad, flat, and weak ; the preopercular 

 border is double, but smooth and unarmed ; the humeral 

 spine is almost obsolete ; the length of the snout is one third 

 that of the head, twice the major diameter of the eye, and 

 greater than the width of the interorbital space ; the maxilla 

 is not quite two thirds of the head in length ; there are only 

 fifteen elongated gill-rakers on the outer side of the first 

 branchial arch ; there are no pseudobranchice whatever. 



Colours in the fresh state transparent grey ; head and belly 

 black. 



The intestine is long and much coiled, and there are a few 

 rudimentary pyloric cfeca in a ring round the pylorus. 



Length nearly 8 inches. 



One specimen from Station 111, 1644 fathoms, and one 

 from Station 117, 1748 fathoms, both being mature females. 



Lamprogeammus, gen. nov. 



Head large, body compressed, both entirely covered with 

 thin, smooth, deciduous scales of moderate size. Head-bones 

 with prominent crests and wide muciparous cavities, unarmed 

 except for a weak opercular spine. Snout not overhanging 

 the jaws. Eye of moderate size. Mouth large; teeth in 

 villiibrm bands in the jaws, palatines, and vomer. No barbel 

 or hyoid filaments. Gill-opening wide; gill-membranes 

 separate ; four gills, eight branchiostegals, no pseudobranchia. 

 Lateral line very cons2ncuous. with muclt eyilarged scales, each 

 of which hears a glatidular {luminous) organ. Vertical fins 

 confluent; pectoral fins entire ; no ventral fins. 



