^'Xy 



92 THE VOYAGE OF H.M.S. CHALLENGER. 



smaller. Numerous specimens were obtained by the "Knight Errant" in the Faroe 

 Channel, in 530 fathoms, the largest being 12 or 13 inches long, at Station 6, in August 

 1880, and Station 2, in August 1882. 



I formerly believed that these specimens represented the younger stage of the large 

 specimen from Madeira (the only one known to me at the time) which I referred in 

 1862 to Risso's fish; but examples received at a later period convinced me that the 

 present species may be constantly, at all ages, distinguished by a comparatively larger eye 

 and shorter head. However, the three European species, viz., Haloporphyrus guentheri, 

 Haloporphyrus lepidion, and Haloporphyrus eques are most closely allied to each 

 VjOther. 



Haloporphyrus inosimw, n. sp. (PL XX. fig. B). 



B. 7. D. 5 I 60. A. 52. Ccec. pyl. 13. 



This species is also very similar to Haloporphyi'us lepidion, but distinguished by 

 much smaller scales. The length of the head is conspicuously less than the distance 

 between the root of the ventral fin and the anal. Eye rather large, one-fourth of the 

 length of the head, equal to the length of the snout and more than the width of the 

 interorbital space. The rows of pores in the prseorbital region are present as in Halo- 

 porphyrus lepidion and Haloporphyrus eques, but the pores are much smaller. The 

 mouth scarcely extends to below the middle of the eye. Barbel nearly as long as the 

 eye. The caudal peduncle is rather slender, its depth being two-thirds of the distance 

 between dorsal and caudal fins. Scales very small, about twenty longitudinal series 

 between the anterior dorsal fin and the lateral line. The first long dorsal ray is rather 

 feeble, extending scarcely to the middle of the length of the dorsal fin. Middle of the 

 anal fin but little depressed. Caudal fin subtruncated. Pectoral fin three-fifths as long 

 as the head, equal in length to the filamentous ventral. 



Brownish, with blackish fins ; the cavities of the mouth, gUls, and abdomen black. 

 -^ Habitat. — Several specimens, from 8 to 12 inches long, were obtained by the 



fy^ -i-iuiyttoM-. — locveiiu speuimeuB, iron 



1^ . Challenger at Inosima, in 345 fathoms. 



Haloporphyrus ensiferus, n. sp. (PI. XIX. fig. A). 



B. 7. D. 5 I 52. A. 46. V. 8. Ccec. pyl. 10. 



Distinguished by the very broad and compressed dorsal ray. The length of the 

 head equals the distance between the root of the ventrals and the vent. Eye rather 

 large, two-sevenths of the length of the head, a little longer than the snout, and in 

 width much exceeding the interorbital space ; pores of the prfeorbital region very 



