1886.] NATURAL SCIENCES OP PHILADELPHTA. 259 



1. Gerres lefroyi. 



Diapterus lefroyi Goode, Amer. Jour. Sci. and Arts, 123, 1874 ; Goode, 



Bull. U. S. Nat. Mus., 1876, 39 (Bermudas). 

 Oerres lefroyi Giinther, Voyage Challenger, Fishes, 10, 1880 (name 



only); Evermann & Meek, Proc. Acad. Nat. Sci. Phila., 1883, 118; 



Jordan, Proc. U. S. Nat. Mus., 1884, 130 (Key West); Jordan and 



Swain, Proc. U. S. Nat. Mus., 1884, 233 (Cedar Keys); Jordan, Cat. 



Fish. N. A., 1883, 95. 

 Eurinostomus productus Poey, Enum. Pise. Cub., 55, 1875 (Havana); 



Poey, Ann. Lye. Nat. Hist. N. Y., 1876 (Havana). 



Habitat. Atlantic coast of tropical America ; West Indies; 

 Bermudas; Cedar Keys; Key West ; Havana. 



The specimens examined by us are from Havana (8 specimens), 

 Key West "(5 specimens), and Cedar Keys (1 specimen). In size 

 they range from 2 to 8^ inches in length. 



Head 3^ to 3^; depth 3|; scales 5-47-9. D. IX, 10. A. II, 8. 

 Body elongate, elliptical, not very strongly compressed ; back 

 little elevated; snout conical, not much pointed; mouth small, 

 end of maxillary I'eaching scarcely beyond vertical from anterior 

 margin of orbit, its length 3 in length of head, exposed portion 

 nearly triangular, its greatest width 2 in its length, which is 5 in 

 length of head. Top of head flattish. Premaxillary groove long, 

 linear and naked. Eye large, 2f in head ; snout 3^ in head, inter- 

 orbital area 3 in head. Gill-rakers weak, small, 7 or 8 below the 

 angle. Dorsal spines all weak and flexible, second and third sub- 

 equal, 5^ in length of head ; upper margin of the fin concave. 

 Second anal spine moderate, its length 4 in head. Least depth 

 of caudal peduncle 3| in length of head. 



Color silvery, darker above, everj'where with fine dusky punc- 

 tulations and traces of crossbars. Top of spinous dorsal black, 

 dorsal, anal, and caudal dusky. Yentrals and pectorals paler, 

 but with dusky punctulations ; axil dusky ; a dark spot on supra- 

 orbital ; snout dusky ; no distinct stripes along rows of scales. 



In form, size and color, this species resembles G. doivi, but is 

 readil}' distinguished from the latter by the presence of two anal 

 spines instead of three. This character is apparently a constant 

 one, observed in many specimens. 



2. Gerres dowi. 



Diapterus dowi Gill, Proc. Acad. Nat. Sci. Phila., 1863, 162 (Panama). 



Genes doici Giinther, Fish. Ceutr. Amer., 448, 1866 (Description taken 

 from Gill); Steiudachner, Ichth. Beitriige, iv, 13, 1875 (No descrip- 

 tion), (Callao, Peru; Galapagos Islands); Jordan & Gilbert, Bull. 



