104 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



and 26 from vent to tail. A second row of pearly spots extends ti'om above root of pecto- 

 ral to origin of anal. 



This species is dedicated to E. G. Blackford, president of the board of fish commis- 

 sioners of the State of New York, in recognition of his services in the promotion of ich- 

 thyological studies. 



The tj'])e of this species was obtained by the Alhnfro.ifi from station 2376, in 20° 03' 15" 

 N. lat., 88° 16' W. Ion., at a depth of 324 fathoms. Two other specimens, the larger one 94 

 inches in length, were taken by the Albatross at the same station. 



DIPLOPHOS, Gunther. 

 Diplophos, Gunther, Journ. Mus. Godeffroy, II, 1873, p. 101 ; Challenger, Report xxxi, 1889, p. 32. 



Body much elongated, band-shaped (covered with largo thin deciduous scales?). A 

 double series of phosphorescent organs runs along the lower side of the body and tail. 

 Head compressed, with pointed snout and projecting lower jaw. Mouth very wide but 

 slightly oblique; jaws armed with small pointed teeth rather unequal in size; eye of mod- 

 erate size; paired flns well developed; dorsal fin in advance of the anal, behind the ven- 

 tral; adipose fin none; anal very long. (Gunther.) 



This genus is represented by two species — the type, JDiplophos tania, and another from 

 the Pacific, Diplophos pacijiciis (Challenger Eeport), 1. c. 33. Both species were obtained 

 near the surface, but their relations with deep-sea forms are very intimate. 



DIPLOPHOS TiENIA, Gunther. (Figure 126.) 



Diplophos fwnia, GtJNTHER, Journ. Mus. Godeffroy, II, 1873, p. 104 ; Chal. Report, xxxi, 1889, p. 32, pi. iv, fig. c. 



The length of the head is one-sixth of the total length, the greatest depth of the body 

 only one-sixteenth. Snout more than twice as long as the eye, pointed, with the lower jaw 

 longest. The maxillary reaches backwards far behind the eye. Dorsal fin short, its first 

 ray somewhat nearer to the end of the snout than to the root of the caudal; anal fin com- 

 mencing below the last dorsal ray, and ending at a short distance from the caudal. Paired 

 fins short; pectoral inserted near to the lower profile; ventrals reaching nearly to the ori- 

 gin of the dorsal. The phosphorescent organs are rounded black bodies, without silvery 

 centre; they are very numerous and arranged in two parallel series along each side of the 

 lower profiles. Those of the upper series are smaller than those of the lower, are quite nmnd 

 and do not extend so fiir towards the head and the caudal, as the lower. The lower are larger 

 and transversely oblong. A pair of still larger luminous organs occupies a j)osition in li'ont 

 of the base of the lower caudal rays. Brownish. {Gunther.) 



Eadial formula: D. 8; A. ca. 43; Y. 8. 



Taken in tow-net at night, lat. 30° S., Ion. 24° W., and lat. 22° N., Ion. 30° W. 



PHOTICHTHYS, Hutton. 



Phoaicliihiis, Hutton, Cat. New Zealaij<l Kibli., 55. 



Photichthi/s, Hutton. Trans. N. Z. lust., v, pi. xv. fig. 90. — Gunther, Chall. Rep., xxii, 177. 



This genus is closely allied to Gonosfotna, from which it difi'ers in the following points : 

 Both jaws are armed with a single series of teeth, those of the maxillary being small 

 and equal in size. The intermaxillary is armed with 2 large fangs besides the small 

 teeth; mandiVde with 7 large equidistant teeth, the spaces between them being filled 

 up with very small denticles. Vomer with a fang on each side of its head; jialatine with 

 strong, curved teeth, which gradually decrease in size backwards. The dorsal fin corre- 

 sijonds in position to the space between ventral and anal; adii)ose fin .small. Air bladder 

 present as a long, simple sac with thick walls. {Hutton, Giiuther.) 



This genus is represented by a single species, P. argenteus, fig. 122 (A), described from 

 specimens thrown ashore at Cook Straits after severe gales. There are specimens in the 

 British Museum and the WeUiugton Museum. 



