51 FISHES OF SINALOA. 423 
length of its pectoral fins as compared with JZugz/ curema. 
The Crustacean is also common and characteristic of the 
same species at Panama. 
bead 27,to 4; depth 4 tow4, >. Dl IV=65 sAe Allo) 
scales 38-13; eye 4% in head; snout 4; maxillary 4. 
Body a little slenderer and more compressed than in 
Mugil curema, the back considerably more arched, the 
profile evenly curved from tip of snout to soft dorsal. 
Eye moderate, with a large adipose eyelid. Head broad 
and round above; interorbital width 22 in head. Teeth 
very small, perceptible with a lens. Tip of lower jaw 
forming about a right angle. Space between dentaries 
club-shaped, very much larger than in J/ugv/ curema, the . 
subopercles barely touching below. First dorsal inserted 
above middle of body nearly over tip of ventral spine. 
Second dorsal moderate; its edge incised. Upper lobe 
of caudal a little longer than lower, as long as head. 
Anal rather high. Ventral inserted before middle of 
pectorals. Pectoral very much longer and more pointed 
than in curema, 1% in head. 
Soft dorsal and anal covered with small scales. 
Color much as in curema, rather greener above, sides 
silvery, with less trace of longitudinal streaks. Fins pale; 
base of pectoral with a round black spot. Upper edge 
of pectoral and end of caudal dusky. No golden on head. 
Iris with a little brown, green above eye. 
Types, Nos. 1695, 2890, 2954, L. S. Jr. Univ. Mus. 
68. Mugil setosus Gilbert. 
Four young specimens taken in a rock pool. The pec- 
toral is as long as in J/7ug7/ hospes, reaching the first dorsal, 
and there is a distinct dark blue spot at its base. Color 
bluish above, muchas in JZug7/ curema; much darker than 
in the original types of the species, with which our speci- 
