BULLETIN OF THE UNITED STATES FISH COMMISSION. 
(>8 
Genus 30. RHINOSCOPELIJS Lntken. 
Body oblong, slender, compressed, with slender and elongate caudal peduncle covered with smooth, 
stiff scales, those in the lateral line much larger than the others; head compressed; cleft of mouth 
very wide; jaws about equal; snout projecting beyond tip of lower jaw; premaxillary long and slender; 
maxillary well developed, reaching nearly or quite to angle of preopercle, without considerable poste¬ 
rior dilation; teeth in villiform bands in the jaws, on the palatines, pterygoids, and tongue; eye mod¬ 
erate, its diameter less than one-third length of head; gillrakers very long and slender; dorsal tin 
premedian; pectoral large; adipose dorsal small; anal tin larger than dorsal; pectoral narrow, elon¬ 
gate; precaudals 2; supraanals about 18, in 2 groups, the break being over middle of the long anal tin 
and at end of first third of the series, approximately; anterolaterals 1 or 2; mediolaterals 2 or 3. Spe¬ 
cies few, mostly of the Atlantic. 
Alysia Lowe, Proc, Zool. Sue. London 1849, 14 ( loricata=coccoi ): name preoccupied. 
Hhiuoscopelus Liilken, Vid. Selsk. Natur. Copenhagen, VII, 1892, 237 ( coccoi ). 
27. Rhinoseopelus oceanicus Jordan & Evermann. Fig. 15. 
Head 3.5 in length; depth 4.1; eye 2.5 in head; snout very short, about f>; interorbital 3.5; I). 
about 12; A. about 18; scales 2-35-3. 
Body strongly compressed, particularly posteriorly, where it tapers into the long, slender caudal 
peduncle; bead exceeding depth of body; month large, somewhat oblique, the jaws equal, the maxil¬ 
lary reaching beyond the orbit, its posterior end club-shaped; eye large; anterior profile rather evenly 
Fig. 15 .—Rhinoseopelus oceanicus Jordan & Evermann; Irom the type. 
convex from tip of snout to nape; teeth difficult to make out, hut a single row of minute ones can he 
seen on the edgeof each jaw, the exterior granular orshort; the villiform stripe, if it exists, being invisible 
even with the aid of a good lens; teeth on vomer and edges of palatines more distinct than those on 
jaws, forming a broader line as if there were 2 or more rows; no granular patches visible on disk of 
palatine bone; an elevated acute mesial line separating one nasal prominence from the other; inter 
orbital space convex, rounded; preopercle nearly vertical, sloping slightly backward from above 
downward; scales large, undulated and very irregularly and sparingly toothed or eremite, and having 
about 3 basal furrows; scales of lateral line conspicuous and more persistent; 7 photophores along base 
of anal, 5 along lower edge of caudal peduncle, 2 at base of caudal, 1 on middle of side above last anal 
photophore, I on each side of belly between ventrals and origin of anal fin, 5 between base of ventral 
and gill-opening, 1 on side above base of ventral, a row of 3 upward and backward from front of anal, 
1 above and 1 below base of pectoral, and 1 on lower anterior portion of opercle; origin of dorsal 
somewhat behind base of ventrals, the posterior rays, together with those of anal, divided] to the base; 
no spine at base of caudal. 
Color in alcohol, uniform brownish, the scales, especially on middle of side, metallic steel blue; 
top of head brownish; side of head bluish; photophores black with silvery center; fins dusky whitish. 
During the Agassiz South Pacific expedition of 1 he Albatross in 1899-1900, 2 examples of this 
species were taken in the surface tow net at. 8 p. m., September 8, 1899, at latitude 10° 57 / N., longi¬ 
tude 137° 35' YV., southeast of the Hawaiian Islands. These are apparently distinct from R. coruscans, 
the type of which came from between St. Helena and Ascension islands, and other specimens from 
