Jordan and Evermann. Fishes of North America. 581 



edge between the verticals from the anterior and posterior margins of the 

 eye. Preopercle extending backward in a sharp angle. Origin of dorsal 

 fin equidistant from root of ventral and the axil of posterior anal ray, 

 and in vertical from fourth or fifth anal ray; greatest height of dorsal 

 about equal to its base ; origin of anal equidistant from the posterior 

 margin of the orbit and base of middle caudal rays, its anterior third 

 greatly prolonged, falcate in form ; length of the longest or third ray 

 about equal to length of base of fin ; posteriorly to end of dorsal the 

 fin is low ; pectorals and ventrals short and feeble ; ventrals inserted 

 about midway between tip of snout and root of caudal fin. A single row 

 of rather conspicuous phosphorescent spots from the lower jaw, beneath 

 the eye, to end of anal on either side, these dots being heavily margined 

 and with black above ; 12 of these between branchial opening and the 

 origin of ventral, 5 between ventral and anal, 16 in the anal series, and 

 2 upon caudal peduncle, 1 at origin of lower caudal rays, the other in 

 vertical above it and about of the distance from the dorsal outline ; 

 a series of vertical, elongated spots, apparently phosphorescent, upon 

 either side of the lower jaw, giving it a pectinate appearance. Color 

 brownish gray ; the head with silvery reflections. 



The types of this species are two specimens, about 1 and 2 inches long 

 respectively, obtained by the steamer Albatross from station 2642, at a 

 depth of 217 fathoms. (nTjddTduro^, having rudder-like fins.) 



Hotiitjmrliu pedalioia, GooDE & BEAN, Oceanic Ichthyology, 102, fig. 120, 1895, Gulf Stream, at 

 25 20' 30" N. , 79 58' W. (Type, No. 44337. Coll. Albatross.) 



275. CYCLOTHONE, Goode & Bean. 



CydotJione, GOODE & BEAN, Bull. Mus. Comp. Zool., x, No. 5, 1883, 221, (lusca). 



Sifjmoiis, GiLL.Proc. TJ. S. Nat. Mus., 1883, 256, (stigmaticus). 



Neostoma, VAILLANT, Exp. Scient. Travailleur et Talisman, 86, 1888, (baihyphihim). 



Body elongate, somewhat compressed, apparently devoid of scales; 

 lower parts with inconspicuous series of luminous spots, with the latter 

 arranged approximately as in Gonostoma, but usually much less conspic- 

 uous. Head conical, compressed; cleft of mouth very wide, oblique, 

 extending behind the eye; the lower jaw strongly projecting. Maxil- 

 lary long and slender, sickle-shaped; somewhat dilated posteriorly, but 

 covering only an inconsiderable portion of the cheek. Upper jaw with 

 a single series of needle-like teeth, some of which are enlarged; lower 

 jaw with similar teeth, and in some species with a few canines in front; 

 teeth on vomer sometimes in patches, sometimes reduced to a single pair 

 of fangs; palatine and pterygoid teeth present or absent. Eye moderate, 

 not conspicuous. Gill opening very wide, the membranes free from 

 isthmus ; gill rakers numerous, long and slender. Pseudobranchiai none. 

 No air bladder. Dorsal and anal moderate, opposite, the latter much the 

 longer; adipose fin sometimes present. (/ci>/lof, round; btibvjj, veil.) 

 CYCLOTHONE: 



a. Anal rays 18 to 22. 



6. Body not greatly elongate, the depth 7 to 8 in length. MICRODON, 873. 



bb. Body elongate, the depth 11 in length. BATHYPHILA, 874. 



SIQMOPS (oiy/xa, the letter s; <!>!//, appearance): 



CM. Anal rays 27 to 30; depth 7 in length. ELONGATA, 875. 



