FISHES FBOM THE HAWAIIAN ISLANDS. 
199 
Family BALISTIDiF. The Trigger-fishes. 
44 . Pachynathus nycteris Jordan & Evermann, new species. 
Head 3.5 in length; depth 1.9; eye 5 in head; snoutl.25; interorbital 2. 6; preorbital 1.5. D. in — 33; 
A. 29; scales about 80. Body short, stout, deep, and greatly compressed; head short; dorsal and ventral 
profiles about equally curved; caudal peduncle short, compressed, its least depth about twice diameter of 
eye, its least width about equal to diameter of eye; a short horizontal groove in front of eye below nostrils; 
nostrils small, close together in front of upper part of eye; teeth broad, close-set, forming a continuous 
plate, the teeth, however, not united; lips thin; mouth small, horizontal, in axis of body; lower jaw very 
slightly the longer; gill-opening short, nearly vertical; a group of bony scutes under pectoral back of gill- 
opening, one of these considerably enlarged; scales regularly arranged in rows, their surfaces granular; 
lateral line beginning at posterior edge of eye, ascending to within 7 scales of spinous dorsal and con- 
tinuing to near origin of soft dorsal, where it disappears; scales on posterior portion of body and on 
caudal peduncle each with a slightly raised crest at its center, these forming series of ridges along the 
side. First dorsal spine strong, blunt, and rough, its length about 2 in head; second dorsal spine 
shorter and much weaker, its length scarcely more than one-third that of first; third dorsal spine 
remote from the second and very short, not extending above dorsal groove; soft dorsal gently rounded, 
its rays of approximately equal length, the longest equaling the distance from tip of snout to posterior 
edge of eye; base of soft dorsal slightly greater than distance from tip of snout to posterior base of first 
dorsal spine or equaling distance from tip of snout to lower base of pectoral axil; anal similar to soft 
dorsal, the rays somewhat longer than those of soft dorsal, the base somewhat shorter; caudal short 
and rounded, the rays about 1.75 in head; pectoral short, the upper rays longest, about 3 in head. 
Color in alcohol, rich brownish or velvety black; spinous dorsal black; soft dorsal pale yellowish 
or whitish, margined with black, the lower half crossed by 4 narrow parallel black lines; anal similar 
to soft dorsal, but with only 2 narrow black lines on its basal half; caudal dusky, yellowish at tip; 
pectoral yellowish. 
Only one specimen. Type, No. 50821, U. S. N. M. (field No. 05089), 6.25 inches long, Honolulu. 
Family TETRODONTID/E. The Puffers. 
45 . Lagocephalus oceanicus Jordan & Evermann, new species. 
Head 2.8 in length; depth 3.6; eye 4.5 in head; snout 2.4; interorbital 3.2; depth of caudal 
peduncle 6; D. 12; A. 12; C. 10; P. 14. 
Body rather elongate, moderately compressed, greatest depth at vertical of pectoral; head long; 
snout long, blunt at tip, the sides flattened; anterior profile from tip of snout to vertical of pectoral in 
a long, low, even curve; ventral outline little convex when not inflated; mouth small; teeth pointed at 
median line, the cutting edge sharp; nostrils separate, not in tubes, the anterior somewhat the larger, 
their distance from eye about half their distance from snout or about half the interorbital space; gill- 
opening vertical, 1.2 in eye, extending a little above base of pectoral, inner flap entirely hidden by 
outer; eye rather large, wholly above axis of body; interorbital space very little convex; cheek long; 
caudal peduncle nearly round, tapering, its length from anal fin equaling snout; back, upper parts of 
sides and entire head entirely smooth, no spines or prickles evident; belly covered with small 4-rooted 
spines, most prominent when belly is inflated, spiniferous area not extending on throat anterior to eye, 
nor on side above base of pectoral, but in front of anal extending upward to level of lateral fold; a line 
of very small mucous pores curving above eye on interorbital space; a strong cutaneous fold on lower 
part of side of caudal peduncle from above anterior base of anal to lower base of caudal fin; no dermal 
fold on head or anterior part of body; mucous pores inconspicuous; dorsal fin somewhat anterior to 
anal, pointed, anterior rays produced, their length equal to that of snout; anal similar to dorsal, its 
rays somewhat longer; caudal lunate, outer rays about 2 in head; pectoral broad, its length a little 
greater than snout, 2.3 in head. 
Color in life, back blackish, fading into deep steel-blue on side; side and below from level of 
upper edge of eye abruptly silvery-blue; sides of belly white, with round black spots about as large as 
pupil, these most distinct about pectoral, before, below, and behind the fin; upper fins dusky; caudal 
