168 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
mouth; mandible shutting completely, arched below so that only the anterior teeth touch the 
front of the jaw above, though the thick fleshy lips conceal them all; teeth molar, those in front 
of jaws pointed; anterior nostrils in short tubes, the posterior pair above the eye with a slightly 
elevated margin; interorbital space convex; top of head more or less swollen or convex in profile; 
gill-opening 1.67 in eye; skin smooth; head with a few pores; origin of dorsal beginning at last 
fourth of space between corner of mouth and gill-opening; caudal small. 
Color in alcohol, grayish white, the body and tail crossed by about 25 broad rich brown bands, 
extending upon the dorsal and anal fins; dark bands anteriorly broadest above and not meeting across 
belly, their width about equal to the distance from tip of snout to middle of eye; first brown band 
through eye, second across nape, the fourth across gill-opening; gray bands of ground color anteri- 
orly broad, and widening much upon belly; posteriorly the gray bands are narrower and better 
defined, especially on the fins, their width scarcely greater than half that of the brown bands; tip of tail 
very narrowly white; body anteriorly, especially within the gray bands, profusely covered with numer- 
ous small, roundish, black specks, less numerous and more scattered posteriorly; no black spots on head; 
angle of mouth black, with a small white blotch immediately in front on low r er jaw, continued across 
under jaw as a broad whitish band; side of head with about 4 or 5 narrow blackish lines between mouth 
and gill-opening; region of gill-opening marbled with dark brown and whitish, the opening dark. 
One example (No. 03545) had much yellow on the head and between the brown zones. 
This species is known from the type and 3 cotypes, all obtained by us at Honolulu. 
Field 
No. 
Length. 
Local it y. 
Final disposition of specimen. 
04899 
Inches. 
21 
Honolulu 
Type, No. 50621, U. S. N. M. AJ > 
Cotype, No. 2698,. U. S. F. C. 
03361 
it 
03545 
17 
do 
Cotype, No. 7448, L. S. Jr. Univ. Mils. 
04900 
15 
do 
Cotype, No. 3965, Field Col. Mus. 
Family MYCTOPHID/E. The Tar. tern -fishes. 
9. Bbinoscopelus oceanicus Jordan & Evermann, new species. 
Head 3.5 in length; depth 4.1; eye 2.5 in head; snout very short, about 6; interorbital 3.5; 
D. about 12; A. about 18; scales 2-35-3. 
Body strongly compressed, particularly posteriorly, where it tapers into the long, slender caudal 
peduncle; head exceeding depth of body; mouth large, somewhat oblique, the jaws equal, the max- 
illary reaching beyond the orbit, its posterior end club-shaped; eye large;' anterior profile rather 
evenly convex from tip of snout to nape; teeth difficult to make out, but a single row of minute ones 
can be seen on the edge of each jaw, the exterior granular or short, 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, and forming a broader line as if there were 2 or 3 rows; no granular patches visible on 
disk of palatine bone; an elevated acute mesial line separating one nasal prominence from the other; 
interorbital space convex, rounded; preopercle nearly vertical, sloping slightly backward from above 
downward; scales large, undulated and very irregularly and sparingly toothed or crenate, 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, 4 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. 
This species was recorded by Fowler from “near the Sandwich Islands,” as Rhinoscopelus corus- 
cans (Richardson), the record being based upon 4 specimens (Nos. 7972 to 7975) collected by Dr.W. H. 
Jones, and now in the Philadelphia Academy. During the Agassiz South Pacific expedition of the 
Albatross in 1899-1900, 2 examples of this species were taken in the surface towing net at 8 p. m., Sep- 
tember 8, 1899, at latitude 10° 57' N., longitude 137° 3- r / W., southeast of the Hawaiian Islands. These 
