2370 Bulletin ^7, United States National Museum. 



Scales of body much largest anteriorly ; lateral line arched. A deep black 

 spot with a white ring between the twenty-second and twenty-fonvth 

 spines; anal edged with white; black cross band at base of caudal with 

 silvery point at upper base of pectoral; a diffuse yellowish spot below and 

 behind eye. Barbados. One specimen 1 inch and 7 lines long. (Stein- 

 dachner); not seen by us. (niger, black; pinnis, fin.) 

 Clinus nigripinnis, Steindachnee, Ich.Notizen, vi, 46, 1867, Barbados. 



27 1.*}. ACCHEXOPTERUS ALTIVELIS (Lockington). 



D. IV-XXIV, 1; A. 21; P. 13; C. 13; V. 2; scales 37. Body compressed, 

 oreatest depth a little behind pectoral axil ; greatest thickness at gill cov- 

 ers; dorsal and abdominal profiles of similar curvature, decreasing regu- 

 larly to the caudal fin ; profile of occiput and superorbital regions convex; 

 snout somewhat produced, its upper outline slightly concave. Head 4 in 

 total length; greatest depth a little less than length of head; caudal pe- 

 duncle about i of the greatest depth. Eye round, lateral, with a slight 

 direction upward, its diameter less than the length of the snout; interor- 

 bital area nearly equal in width to the diameter of the eye, concave trans- 

 versely, upper orbital borders slightly raised. A sliort nasal tentacle 

 slightly anterior to the front margin of the eye; a large fimbriated tentacle 

 on each side of the first dorsal ray. Clei't of mouth oblicjue, the lower 

 jaw the longer; the posterior convex extremity of the club-shaped maxil- 

 lary about vertical with the center of the pupil. Teeth of the outer row 

 regular, sharp, incurved, the lai-gest in front, gradually decreasing along 

 the lateral portions of the jaws, and not extending much past the middle 

 of their length ; a narrow band of small teeth in the rear of the outer row ; 

 vomerine teeth present. Branchiostegals 6; gill openings continuous, 

 membranes not attached to the isthmus. Distance from first ray of dorsal 

 to posterior margin of eye equal to length of snout; first 2 rays of dorsal 

 much developed, the first slightly the longer, and nearly equal in height 

 to the distance of its base from the tip of the upper jaw; third ray 

 about I the length of the iirst; fourth very short; succeeding rays to the 

 twenty-sixth longer than the third, the last 3 somewhat decreasing. Anal 

 commencing under eleventh dorsal ray, coterminous with, and equal in 

 height to, the dorsal. Caudal with 13 simple jointed rays, the longest in 

 the center, posterior margin convex. Pectorals narrow, lanceolate, the 

 fifth and sixth rays longest and ^ the length of the head. Ventrals inserted 

 in advance of the pectorals. Lateral line with 37 simple pores, parallel 

 with dorsal outline to opposite the origin of the anal, where it is deflected 

 almost perpendicularly downward to the middle of the side of the body, 

 along which it continues to its termination. Scales rather large, about 10 

 in a transverse row in the central part of the body, their posterior margin 

 membranaceous; no scales on fins; a line of pores around the margin of 

 the orbit, another along the posterior margin of the preoperculum, con- 

 nected with each other and with the lateral line by a line from the center 

 of the hinder border of the eye. Color in alcohol, bright pink above, 

 becoming dusky below; underside of head light olivaceous, lower lip 



