FISHES OF WEST COAST OF PEEU. 53 



Pacific coast of America from Guaymas to Peru ; a common food 

 fish, known from Guaymas, Mazatlan, Chiapam, Punta Arenas, 

 Panama, Guayaquil, Tumbes, and Callao. 



Family SYNGNATHIDAE. 



THE PIPEFISHES. 



Genus SIPHOSTOMA Rafinesque. 



KEY TO SPECIES. 



c\ D. 40 or 41; dorsal rays li+8; body rings 18+42; head and body 2.60 in 



total length aciculare, p. 53. 



a\ D. 35-S7; body rings 20 or 21+50; body 1.5-1.67 in tail.^ blainvilUana, p. 53. 



76. SIPHOSTOMA ACICULARE (Jenyns). 

 AGUJA. 



Syngnathus acicidaris Jenyns, Zool. Voy, Beagle, Fishes, 1842, p. 147, 

 pi. 27, fig. 3 ; Valparaiso. — Guichenot in Gay, Hist. Chile, Zool., vol. 2, 

 1845, p. 347.— Steindachnek, Fauna Chilensis, 1898, p. 331. 



Siphostoma aciculare Abbott, Marine Fishes of Peru, Proc. Acad. Nat. 

 Sci. Phila., 1899, p. 338. 



Four sp\ecimens, field No. 09156, 13.5-15.3 cm. long, from Ancon, 

 taken with seine on beach, seem to be referable to this species. 



Head 7.28 to 7.45 in total length; head and trunk 2.6; trunk 4.02; 

 snout 2 to 2.1 in head ; eye 7 to 8 ; pectoral 4 to 4.2 ; D. 40-1 ; dorsal 

 rings 11+8; body rings 18+42. Nuchal plates with a median ridge; 

 dorsal fin commencing slightly in advance of vent; anal very small; 

 caudal well developed. Color in alcohol brow^n, dorsal translucent. 



77. SIPHOSTOMA BLAINVILLIANA (Eydoux and Gervais). 



SyngnatJws blainvUlianus Eydoits and Gervais, Guerin, Mag. Zool., vol. 4, 



1837, pi. 17; Voyage Favorite, Zool., 1839, p. 79, pi. 32.— GtJNTHER, 



Cat. Fish. Brit. Mus., vol. 8, 1868, p. 162. 

 Syngnafhus blainvilleanns Gay, Hist. Chile, Zool., vol. 2, 1848, p. 348. 

 Leptonotus Mainvillei Kaup, Pophobrauchii of Brit. Mus., 1856, p. 46; 



Peru. 

 Syngnafhus (Leptonotus) blainvilUaniis Steindachnek, Fauna Chilensis, 



1898, p. 331. 

 Leptonotus blainvUlianus Abbott, Marine Fishes of Peru, Proc. Acad. Nat. 



Sci. Phila., 1899, p. 338. 



This species is recorded from Peru, Chile, India, Auckland Islands, 

 and New Zealand. 



Family SCOMBRIDAE. 



THE MACKERELS. 



KEY TO GENERA. 



a\ Caudal peduncle without median keel on each side; dorsal fins well sepa- 

 rated, the interspace being less than half the length of the head ; spinous 



dorsal short, of 9 to 12 spines Scomber, p. 54. 



40656°— Bull. 95—17 5 



