298 Mr. A. Alcock on the Baihyhial Fishes 



Our single specimen is a female 10^ inches long, with the 

 radial formula 



B. 8. D. 106. A. 78. C. 6. P. dextra 18/6. 

 P. sinistra 18/9. V. 2. 



It was taken at Station 105, 740 fathoms. 



Dermatorus, gen. nov. 



Allied to PorogaduSy Goode & Bean, and to BathyonuSf 

 Gthr. 



Body compressed, with long tapering tail. Head with 

 well-developed muciparous cavities and spiniferous bones. 

 Snout depressed, with jaws conterminous in front. Eye of 

 moderate size. Mouth very wide ; villiform teeth in bands 

 in the jaws and palatines, few and scattered on the vomer. 

 No barbel. Gill-openings very wide ; eight branchiostegals ; 

 four gills ; well-developed gill-rakers. Pseudobranchiai quite 

 rudimentary. Scales small, deciduous. Lateral line indis- 

 tinct. Ventral fins contiguous ; each consists of a single 

 simple filament. No pyloric cteca. 



4. Dermatorus trichiuruSj sp. n. 



Snout depressed, pointed. Head-bones and opercles with 

 numerous acute spines. Body compressed, elongate, low — 

 its height being from rr to iV of the total — ending in a long 

 lash-like tail. 



B. 8. D. 160 + .r. A. 140-1-^. C? P. 16 (?). V. 1. 



Head symmetrically cuneiform, its raucifcrous cavities well 

 developed, opening externally by large pores, and bounded 

 by salient spiuigerous crests ; its length is between ^ and | 

 of the total, its height a little more than the length of its 

 postorbital portion, its breadth not quite half its length. A 

 strong, acute, erect spine at each anterior orbital angle, and 

 diverging backwards from it, on each side, two irregular 

 rows of acute recumbent spines, the last spines of the rows 

 situated respectively at the exterior occipital and the post- 

 temporal angles ; operculum with a strong sharp spine above ; 

 preoperculum with a double border, and each border with 

 three rather distant spines radiating from its angle ; an 

 obliquely reclining humeral spine. 



Snout not overhanging the mouth, depressed, rounded from 

 side to side, its dorsal and ventral profiles meeting at a very 

 acute angle ; its length is * that of the head, equal to the 



