2812 Bulletin //, United States National Museum. 



widely spaced black specks ; a dark vertebral streak, more or less of it 

 often consisting of 2 narrow lines; tips of caudal lobes often blackish; 

 fins otherwise unmarked. This species differs from closely allied species 

 in the following characters: From Stolephorus Ittcidus, in the much longer 

 head, more compressed body, well-defined lateral stripe, and smaller eye; 

 from S. compressus, in the longer head and wider lateral band ; from S.pan- 

 amensis and S. mundeolus, in the much more numerous gill rakers, and the 

 more anterior position of the dorsal relative to the anal, the origin of 

 the anal being under the middle of the dorsal, while in S. panamensis the 

 origins of the two fins lie in the same vertical. Length 2 to 3 inches. 

 Panama. Many specimens. (Gilbert & Pierson.) (rastrum, a rake, from 

 the long gill rakers.) 

 Stolephorus rastralis, GILBERT & PIEESON, Fishes of Panama, MS. 1898, Panama. 



732(l>). STOLEPHORUS MUNDEOLUS, Gilbert & Pierson, new species. 



Head 4.15 (4 to 4.25) ; depth 3.77 (3.40 to 4.25) ; eye 3.44 in head (3.12 to 

 3.70). D. 13 or 14; A. 33 (33 to 35) ; scales 36 (35 to 39). Dorsal and ven- 

 tral contours about equally and gradually rounded from the middle region 

 of body to the tip of snout and base of caudal fin. Snout short, high, 

 compressed, blunt at tip, its length 1.8 in eye. Eye very large. Maxil- 

 lary broad, tapering to a sharp point, which reaches margin of gill open- 

 ing. Gill rakers 17 to 22 -f 21 to 24 ; the longest 1.5 to 2 in eye. Anterior 

 insertion of dorsal fin varying from a point midway between base of 

 caudal and middle of eye, to a point midway between the caudal and tip 

 of snout. In 10 examples its insertion is before that of the anal. Anal 

 fin long, averaging 33 rays, its origin beneath the anterior third of the 

 dorsal; length of base shorter than in S. panamensis, being 3.04 in length, 

 while in the latter its length is contained 2.5 in length. Pectoral long, 

 reaching well beyond the insertion of the veutrals, equaling length of 

 head behind front of pupil; a large axillary scale; ventrals scarcely 

 reaching vent. Uniform light olive, with silvery reflections; a faint, 

 narrow, silvery -gray lateral stripe, sometimes scarcely distinguishable; 

 sides of head plain silvery; upper margin of orbital rim black; dorsal 

 region blackish; a faint, narrow dark line on each side of the light mid- 

 dorsal streak; caudal slightly dusky; fins otherwise unmarked. This 

 species is closely allied to Stolephorus panamensis and S. compressus, but 

 may be distinguished from the former by its longer head, larger eye, 

 greater depth, fewer scales along the'lateral line, and its much shorter 

 anal base; also by the much fainter lateral silvery stripe. The eye is 

 contained 14 to 16 times in length, excluding the caudal, while in S. 

 panamensis the length contains the eye 16 to 20 times. From S. compressus 

 it differs in the relative length of the head and maxillary. In S. mundeolus 

 the maxillary is contained in the head 1.27 times (1.19 to 1.37); in com- 

 pressus 1.48 times (1.30 to 1.81). In mundeolus the head is contained 4.15 

 times in the length ; in compressus 4.44 times. Length 4 to 6 inches. 

 Panama; many specimens. (Gilbert.) (mundeolus, somewhat shining, 

 from mundus, neat or clean.) 

 Stolephoru* mundeolus, GILBERT & PIKRSON, Fishes of Panama, MS. 1898, Panama. 



