46 PAPERS FROM TORTUGAS LABORATORY vol. xxxiv 



with 3 or 4 retrorse spines above and 1 terminating it posteriorly; lateral line on 

 blind side obscure or obsolete, on colored side strongly arched above pectoral, 

 base of arch about one-quarter length of straight part; scales on colored side 

 ctenoid, 51 or 52 in lateral line with pores, cycloid on blind side; pectorals with 

 11 rays each, tip of the fin on eyed side reaching beyond arch in lateral line. 



Six males, 80 to 100 mm. in length, have each six black bars on the blind side, 

 the ground color of this side being ashy gray. The eyed side is gray with three 

 dark spots almost equally spaced along the straight part of the lateral line, three 

 smaller ones at bases of dorsal and ventral fins, and an imperfect bar at base of 

 caudal. Two females, 75 to 80 mm. long, show no trace of bars on the under side. 



Known only from Tortugas. W. H. L. 



Monolene antillarum Norman 



Monolene antillarum Norman, Ann. and Mag. Nat. Hist., ser. 10, vol. 12, 1933, p. 204 — 

 off Barbados; Flatfishes, vol. 1, 1934, p. 166, fig. 118. 



Specimens 75 to 170 mm. long were taken very commonly in 85 to 180 fathoms 

 south of Tortugas. W. H. L. 



The southern specimens were considered identical with the more northern 

 ones, Monolene sessilicauda Goode, until Norman (see citations above) recog- 

 nized them as distinct. The relation seems so close, however, that the southern 

 form probably should be considered only a subspecies. Norman has stated that 

 the body in M. antillarum usually is a little more slender, the head apparently 

 longer, eye larger, and scales fewer. That the differences in all these respects are 

 small is evident from the proportions and counts given by Norman, as well as 

 from those that follow. 



The following enumerations and proportions are based on Florida specimens, 

 and on a paratype of M. sessilicauda from 40 02' 26" N., 70 22' 58" W. (U. S. 

 Nat. Mus. no. 26002). The proportions and enumerations based on the paratype, 

 which is 74 mm. long to base of caudal, are enclosed in parentheses. The other 

 specimens are 97 and 109 mm. long to base of caudal. Head 5.5, 4.6 (4.9) ; depth 

 2.9, 3.3 (2.8). Eye in head 3.5, 2.8 (3.75) ; snout 5.0, 5.5 (5.3); maxillary 4.0, 3.7 

 (3.25). D. 96, 97, 100, 102 (103); A. 79, 80, 81, 82 (79); scales 80, 80, 85 (about 

 90, many scales lost; 92 in original description). 



The longer maxillary, which reaches the anterior margin of the eye in Florida 

 specimens, whereas it reaches to the pupil in the northern one, is the most evident 

 difference. It is noteworthy also that although the northern specimen is the 

 smallest, its eye is proportionately the smallest. The scales cannot be counted 

 accurately in the paratype of M. sessilicauda, but they appear to be rather smaller, 

 and more numerous on the rays of the dorsal and anal, as well as in the longi- 

 tudinal series. The paratype has approximately 19 rows above the lateral line and 

 approximately 21 below it, whereas the Florida specimens have about 16 above 

 and about 18 below. 



It is evident that more specimens must be studied to determine the exact rela- 

 tionship. 



West Indies to Florida. S. F. H. 



