190G Bulletin 4.7, United States National Museum. 



Coitus uncinatus, REINHARDT, Vid. Selsk. Xatur. Math. Afh. 1833, 44, Greenland. 

 Icelus uncinatus, KROYEB, Naturh. Tidsskr. 1844, 253. 



Centridermichthys uncinatus, GUNTHER, Cat., n, 172, I860; COLLETT, Norske Nord-Havs 

 Exped., 29, 1880. 



2287. ARTEDIELLTJS ATLANTICTJ8, Jordan & Evermann, new species. 



Head2f; depth 5; D. VII, 13; A. 11; P. 20; eye 3 in head ; maxillary 2 ; 

 pectoral 1; pores in lateral line 20. Body rather elongate, robust ante- 

 riorly, greatest height at origin of dorsal; body tapering gradually into 

 the long slender caudal peduncle ; mouth moderate, the maxillary reaching 

 to below middle of pupil ; narrow bands of villiform teeth on jaws, vomer, 

 and palatines ; interorbital a narrow ridge; anterior nostril ending in a 

 short tube; a line of pores around orbitals to preopercle; nasal spines 

 present, very short, a pair of blunt protuberances at occiput ; a large, 

 sharp, strongly curved spine at preopercle, and a short straight one below 

 it pointing downward and forward ; a small fleshy papilla in front of each 

 eye, and a minute thread-like tentacle at end of maxillary ; origin of dor- 

 sal over base of pectoral; pectoral reaching past notch between dorsals, 

 ventrals inserted behind lower end of pectoral base, in distance equal to 

 length of snout, their tips not quite reaching vent. Color in spirits, 

 creamy, with indications of reddish-brown cross bars, the same color as 

 back; a dark blotch at base of caudal; head somewhat mottled with 

 brown; spinous dorsal blackish with 2 white streaks and a series of spots 

 running transversely across the spines ; second dorsal with 6 dark cross- 

 bands, anal with 4 similar bands; pectoral and caudal with 2 or 3 irregu- 

 lar cross bars. This species differs from Collett's figure in the spines on 

 the occiput, being represented in the cut as lower down toward the sides 

 of head, and with radiating striations. Labrador to Cape Cod; in rather 

 deep water. Here described from a specimen 2| inches long from Massa- 

 chusetts Bay, taken by the U. S. Fish Commission. Very close to Artediel- 

 lus uncinatus with which it has been hitherto identified, but apparently 

 distinct. 



Icelus uncinatus, JORDAN & GILBERT, Synopsis, 693, 1883, specimen from coast of Massa- 

 chusetts. 

 Artediellus uncinatus, GOODE & BEAN, Oceanic Ichthyology, 267, fig. 255, 1896. 



2288. ARTEDIELLUS PACIFICUS, Gilbert. 



D. VII or VIII-12 or 13; A. 11 or 12; P. 23, 2 (22 to 24) ; V. I, 3 ; caudal 

 with 9 divided rays (not 11 as in Artediellus uncinatus} ; lateral line 24 (22 

 to 26) ; length of head (measured to end of opercular flap) 2f to 2^; depth 

 4J-; least depth of caudal peduncle If times in orbit; its length, from base 

 of last anal ray, 2g in head. Very closely related to Artediellus uncinatus, 

 differing in the entire obsolescence of the occipital protuberances or 

 ridges, in the increased number of cirri on the head, the more numerous 

 pores of the lateral line, the greater number of rays in the pectoral fins, 

 and the reduction in the rays of the caudal. This diagnosis is the result 

 of a comparison of our types with Collett's description of Centridermich- 

 thys uncinatus (Norske Nord-Havs Expedition, 1880, 29), no typical 



