170 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
This species is known to us only from the example described above. It is closely related to the 
Japanese Hippocampus aterrimus Jordan & Snyder, but on comparison with the type of that species 
was found to differ, in the presence of the keel on the top of the head and in other minor characters. 
It is also close to II. ringens. 
Type, No. 50626, U. S. N. M. (field No. 03832), a specimen 6 inches long, presented to us by Mr. 
A. M. Wilson, of Hilo, Hawaii, where he obtained the specimen. 
Family ATHERIN1DAE The Silversides. 
12. Atherina insularum Jordan & Evermann, new species. 
Head 4 in length; depth 4.75; eye 3 in head; snout 4; interorbital 2.8; maxillary 2.5; mandible 2.2; 
D. vi-i, 11; A. 17; scales 46, 6 rows from anterior base of anal upward and forward to spinous dorsal. 
Body oblong, compressed; head triangular, the sides compressed, top flat; mouth large, oblique, 
maxillary reaching front of pupil, lower jaw included; teeth in rather broad villiform bands on jaws, 
vomer, and palatines; interorbital space very broad and flat; snout broad, truncate; origin of spinous 
dorsal slightly posterior to vertical at vent, slightly nearer tip of snout than base of caudal; longest 
dorsal spine about 2.4 in head, reaching nearly to vertical at front of anal; distance between spinous 
and soft dorsals equal to distance from tip of snout to middle of pupil; edge of soft dorsal concave, 
anterior rays somewhat produced, their length 1.9 in head; last dorsal ray about one-half longer than 
one preceding; base of soft dorsal 1.8 in head; origin of anal considerably in advance of that of soft 
dorsal, the fins similar, anterior rays about 1.7 in head, base of anal 1.3 in head; caudal widely forked, 
the lobes equal; ventral short, barely reaching vent; pectoral short, broad, and slightly falcate, its 
length about 1.4 in head. Scales large, thin, and deep, 19 in front of spinous dorsal, 6 rows between 
the dorsals and 9 on median line of caudal peduncle. 
Color when fresh, clear olive green with darker edges to scales; lateral stripe steel blue above, 
fading into the silvery belly; fins uncolored. 
Color in alcohol, olivaceous above, silvery on sides and below; scales of back and upper part of 
side with numerous small round coffee-brown specks, disposed chiefly on the edges; median line of 
back with a darkish stripe; middle of side with a broad silvery band, plumbeous above, especially 
anteriorly, more silvery below; top of head and snout with numerous dark brownish or black specks; 
side of head silvery, opercle somewhat dusky, sides and tip of lower jaw dusky; dorsals and caudal 
somewhat dusky, other fins pale; pectoral without dark tip. 
This small fish is common inside the reef in shallow bays everywhere in the Hawaiian Islands. 
Many individuals were seen off the wharf at Lahaina on Maui. Our collections of 1901 contain 20 
specimens from Kailua, from 1.5 to 3.5 inches long; 43 from Hilo, 1.5 to 2.25 inches long; and 1 from 
Honolulu, 2.25 inches in length. Numerous specimens were obtained by the Albatross at Honolulu in 
1902, 1 of which is taken as our type and 3 others as cotypes. 
Type, No. 50819, U. S. N. M., 4.25 inches long, obtained by the Albatross at Honolulu. Cotypes 
No. 2741, U. S. F. C., 3.9 inches long; No. 2302, Am. Mus. Nat. Hist., 3.9 inches long; and No. 4063, 
Field Col. Mus., 3.5 inches long, all collected at Honolulu by the Albatross. 
Family II 0 L0 C E NT R I DTE. The Squirrel-fishes. 
13. Myripristis berndti Jordan & Evermann, new species. 
Head 2.8 in length; depth 2.4; eye 2.7 in head; snout 4.7; maxillary 1.7; interorbital 4.9; D. x-i, 
16; A. iv, 14; P. i, 14; V. i, 7; scales 4-32-7. 
Body elongate, deep, compressed, its greatest depth at base of ventral; head large, compressed, its 
depth less than its length; snout short, blunt, convex, its width about twice its length; upper profile 
of head straight from above nostril to occiput; eye large, high, its diameter a little less than posterior 
part of head, and its upper rim hardly impinging upon upper profile of head; mouth very large, 
oblique; mandible slightly projecting, the maxillary not reaching posterior margin of eye; distal 
expanded extremity of maxillary 1.7 in eye; several enlarged, blunt teeth on outer front edges of jaw 
and sides of mandible; teeth in jaws fine, in broad bands, also on vomer and palatines; tongue thick, 
pointed, and free in front; suborbital rim narrow, finely serrate; lower posterior margin of maxillary 
with blunt denticulations ; lips rather thick and fleshy; nostrils close together, posterior very large, 
close to front rim of orbit; bones of head all finely serrate; opercle with well-developed spine; gill- 
