139 FISHES OF SINALOA. 511 
19. Xystema cinereum (Walbaum.) 
Common. About twenty specimens obtained. 
20. Gerres lineatus (Humboldt). 
Common. 
21. Scarus perrico Jordan & Gilbert. 
One specimen, found dead on the beach. 
22. Spheroides lobatus (Steindachner). 
Common. Two specimens obtained. In color these 
approach Spherotdes augusticeps (Jenyns). It may be 
that Jobatus is, after all, the young of auwgusticeps, as 
was supposed by Jordan and Gilbert. 
23. Diodon holacanthus Linnzus. 
Common. One specimen, 11 inches long, was obtained. 
D. 12; A. 12; back and sides covered with spots; no 
spots on fins or tail; back very dark; a dark band _ be- 
tween eyes; frontal spines nearly as long as pectoral 
spines which are longest. 
24. Alexurus armiger Jordan, n. g. and sp. Gosip. 
Plate xlviii. 
Head 4%; depth 8; dorsal VI-13; anal 11; V.I, 5; 
scales about 102-30; eye 8 in head; maxillary 2% ; man- 
dible 2%; snout 5%; interorbital 4% ; pectoral 1%; cau- 
dal equals head; ventral 2; last dorsal ray 13. 
Body long and low, compressed posteriorly, depressed 
in front. Head flattish and broad above, the cheeks mod- 
erately tumid. Eyes small, high up, separated by a broad 
flattish interorbital space; snout short; mouth moderate, 
very oblique, the maxillary ceasing below the center of 
pupil; lower jaw very heavy, oblique, projecting beyond 
upper, its outline horseshoe-shaped, obtuse infront. Teeth 
in rather broad bands, the outer enlarged below, but 
