420 PROCEEDINGS OF THE ACADEMY OF [J UD.e, 



region and top of head, and smaller on breast, prepectoral region and 

 caudal base. Cheek with 3 rows of scales. Lateral line complete, 

 inconspicuous, developed as single small pore on each exposure of 

 scale. 



Dorsal origin slightly nearer gill-opening than caudal base, branched 

 rays about uniformly high, and extend § space to caudal base. Anal 

 inserted about opposite base of second or third dorsal ray, and 

 median posterior rays longest, longer than dorsal rays, and reach 

 f to caudal base. Caudal apparently truncate behind, rounded as 

 spread open. Pectoral low, rather small, reaches about f to ventral. 

 Latter inserted nearly midway between front of eye and caudal 

 base, fin reaching vent, close before anal. 



Color in alcohol largely dull brownish with faint olivaceous tinge, 

 especially above. Each scale with a rounded paler basal spot. 

 These spots at intervals of several scales each with pearly tint or 

 whitish, so that traces of about a dozen vertical whitish streaks 

 occur. Fins brownish, dorsal and caudal little darker. Dorsal 

 with several large cream-colored blotches about basal portion of fin, 

 and caudal with three irregular and obscure vertical darker cross-bars. 

 Iris pale yellowish. 



Length 78 mm. 



Type, No. 7,225, A. N. S. P. St. Martins, Danish West Indies. 

 Dr. R. E. Van Rijgersma. 



Also No. 7,226, A. N. S. P. Paratype, same data. Head 3f; 

 depth 4; D. i, 10; A. i, 9; scales about 31 to caudal base and 5 more 

 on latter; 13 scales transversely between dorsal and anal origins; 

 about 25 predorsal scales; snout 3| in head measured from upper 

 jaw tip; eye 3|; maxillary 3; interorbital 2|. Length 76 mm. 

 This example a female, and its coloration largely like the type. 

 Dorsal and caudal fins differ only in being uniform brownish. Anal 

 with a well-developed tube along its front edge but little shorter 

 than first anal ray. 



This species is very closely related to F. heteroclitus. Compared 

 with examples of equal size, but slight, though apparently constant, 

 points of difference are noted. The males of both species are quite 

 similar, though in F. heteroclitus the white spots on the dorsal are 

 much smaller. As the female of F. heteroclitus is uniform brownish 

 the female of F. antillarum differs in having the base of each scale 

 with a whitish spot. In proportions, measurements, etc., the two 

 species are similar. A large series of F. heteroclitus easily covers the 

 structural characters. 



