1886.] 



NATURAL SCIENCES OF PHILADELPHIA. 



2T1 



vertical from anterior margin of pupil, its length 2f in head ; 

 exposed portion of maxillary oblong, its width 2^ in its length, 

 which is 4| in length of head. 



Preorbital and preopercle serrate ; premaxillary groove broad 

 and entirely free from scales. Gill-rakers small, weak, 13 below 

 the angle. Eye rather large, 3 in head ; snout 4 in head. Dis- 

 tance from tip of snout to dorsal fin equals the greatest depth of 

 fish. Upper margin of dorsal fin is sickle-shaped. Second dorsal 

 spine very strong and long, its length 2| in length of body ; the 

 other spines rather weak and flexible. Second anal spine very 

 long and strong, its length equals length of head ; third anal 

 spine shorter and much weaker than second. Pectoral fins 

 reaching beyond the front of anal, their length 2f in length of 

 body ; ventral fins reaching past vent, almost to front of anal, 

 their length 3 in length of body. 



Color bluish-silvery above, silvery below ; distinct dark longi- 

 tudinal lines along each row of scales. Dorsal caudal and anal 

 fins dusky ; margin of dorsal fin black ; a dark supraorbital spot. 

 Pectoral and ventral fins pale. 



The following is a list of the nominal species referred to in the 

 foregoing paper, arranged in chronological order, with our iden- 

 tification of each. Tenable specific names are printed in italics. 



Nominal Species. 

 Mugil cinereus Walbanm, 

 Smaris lineatus Humboldt, 

 Gerres jjlumieri Cuvier and Valenciennes, 

 Gerres hrasilianiis Cuv. and Val., 

 Gerres rJiombeus Cuv. and Val., 

 Gerres aprion Cuv. and Val., 

 Gerres gula Cuv, and Val., 

 Gerres peruvianus Cuv. and Val., 

 Gerres zebra jMiiller and Troschel, 

 Eucinostomus argeuteus Baird & Girard, 

 Gerres patao Poey, 

 Gerres squamipinnis Giinther, 

 Diapterus californiensis Gill, 

 Diapterus gracilis Gill, 

 Diapterus dowi Gill, 

 Gerres axillaris Gihitlicr, 

 Gerres brevimartus Giinther, 

 Gerres lefroyi Goode, 

 Eucinostomus pseudo-gula Poey, 

 Eucinostomus gulula Poey, 



