636 BULLETIN OK THE UNITED STATES FISH COMMISSION. 



Tasnianotus citrinellus, new species. Plate 81. 



Type, .50 mm. long, from station .'iS49, off the soutli eoast of M(.ilokai, ilepth i'S to 73 fathoms; 

 type, No. 51634, U. .S. Nat. Mus. 



Head 43 liundredths of total length to base of caudal; ilepth 54; depth of caudal peduncle 13; 

 greatest thickness (at oiierclea) 14; length of snout 15; diameter of orbit 10; length of maxillary 20; 

 interorbital width 6; first dorsal spine 23; second dorsal spine .35; longest (third) dorsal spine 37; 

 last dorsal spine 25; first dorsal ray 30; longest dorsal ray 33; last dorsal ray 19; first anal sjiine 12; 

 second anal spine 20; third anal .spine 23; longest anal ray 28; longest caudal ray 35; longest pectoral 

 ray 44; longest ventral ray 28. D. xii, 10; A. in, 6; 1'. 14; V. i, 5. 



lioilv closely and everywhere about equally compressed; head scarcely wider, with vertical .sides; 

 eye innnediately below upper profile; orbital rim elevated; interorbital space gently concave; three 

 short but strong spines on supraorbital rim, the posterior the longer; two short strong spines on each 

 side of oc-ciput, one external and a little posterior to the other; two small weak suprascapular spines; 

 opercle w-ith 2 weak curved and diverging ridges, each ending in a weak spinous point; preopercle 

 with 2 small triangular spines alnive angle, and a very small one below; preorbital crossed by 3 low 

 ridges, which intersect at a common point, one running downward and forward from orljit and jiarallel 

 with upper contour of snout, the second forming the anterior continuation of the suborliital ridge, 

 the third intersecting the second nearly at a right angle, each ridge ending in an inconspicuous spinous 

 |)oint; nasal spines strong, closely approximate; a pair of very large supraorbital flaps reaching, 

 when depressed, to base of first dorsal spine, each long and narrow, with its margin sjiarsely fringed; 

 a large fringed ciirus arising from posterior margin of anterior nostril, which is in a shoi-t broad tul)e; 

 when depressed, the nasal cirrus reaches to or beyond vertical from front of jnipil; posterior nostril 

 an oblong pore, close l.iehind anterior; a short pedunculate flap on each side of tip of snout; a series of 

 3 long slender simple filaments on mid-gular line; a series of similar filaments along raandilile; mouth 

 very obli(jue, mandil>le included; maxillary broad, not slipping under preorbital, reaching a verti<'a! 

 from front of pupil; teeth villiform an<l very small, in narrow Viands in jaws; a few slight asperities on 

 vomer; palatines toothless; branchiostegal membranes moderately joined across throat, and free from 

 istlimus; liranchiostegal rays 7; pseudoliranchire large; gills 3.V, no slit behin<l last arch; gill-rak<>rs 

 represented by small spinous tubercles on all the arches. 



First dorsal spine inserted over posterim- eilge of orbit, equaling in length the next to the last 

 sjiine, and two-thirds the length of the thinl; third spine a trifle longer than second, and the longest 

 in dorsal fin; twelfth spine a little longer than the eleventh and oliviously shorter than the succeeding 

 ray; memlirane from last dorsal ray joining caudal fin so as to include basal third of second ray; first 

 ray short and entirely included; last dorsal ray cleft to base; anal spines regularly graduated, the 

 third equaling in length the first dorsal spine; last anal ray cleft to base; pectoral fin long and narrow", 

 tlie width of its base about one-third its length, the tips of the longest rays reaching a vertical from 

 middle of anal fin (on right side, fin of left side still longer) ; ventral spine inserted vertically below- 

 upper pectoral ray, somewhat in advance of the lower, the pectoral l)ase curved downward and 

 liackward; third ventral ray longest, failing to reach front of anal liy less than one-tenth its own 

 h'ugth; inner ventral ray attached by membrane to sides of abdnnicn; caudal fin rounded. With the 

 exception of the last dorsal and anal rays, which are forked to extreme base (better, perbajis, to l)e 

 I'onsidered 2 rays in each case, springing from the same basal), all the rays of the vertical fins simjile; 

 second, third, and fourth ventral rays forked for a short ilistam-c near their tips, all other ventral rays 

 and all pectoral rays simple. 



Scales small, irregular, very thin, scarcely imbricated, their outlines not to be made out until the 

 skin is dried, appearing cycloid, but each bearing at its free edge a short spine, projecting at an angle 

 with surface of scale; on sides of head scales are reduced to' small scattered prickles; tubes of lateral 

 line 22 in number bearing no relation to the scales; lateral line straight, oblique, not curved, parallel 

 with outline of back; no cirri along course of lateral line; basal half of pectoral fin bearing small scales, 

 each furnished with a minute prickle. 



Color lemon-yellow, clouded with pale brownish; fins ilarker; clorsal and caudal with reddish 

 Ijrown tinge; a few minute pearly spots widely scattered on sides of head and anterior part of liody 

 and on pectoral fin, a small spot of the same color crossing eat^h pectoral ray near its tip. 



One specimen only was obtained. 



