Jordan and Ever mann. Fishes of North America. 767 



1120. SIPHOSTOMA AULISCUS, Swain. 



Head 9 to 9 in total length. D. 29 to 30; rings 15 + 37 to 38. Trunk 

 rather slender. Snout 2 in head, median ridge above distinct, below 

 comparatively broad and blunt. Occiput and nuchal plates sharply car- 

 inated; belly weakly keeled. Opercle slightly keeled, very convex, 

 making the head slightly broader than deep. Dorsal little longer than 

 head, covering 1 + 7 rings; pectorals scarcely higher than long, slightly 

 exceeding diameter of eye. Tail longer than rest of body, l.f in total 

 length ; caudal pouch covering 21 rings. Color in spirits somewhat lighter 

 than S. californiense, scarcely mottled or marbled. Southern California, 

 north to Point Concepcion; not very common, (diminutive of aivUf, a 

 tube.) 



Siphostoma auliscus, SWAIN, Proc. U. S. Nat. Mus., 1882,310, Santa Barbara; San Diego; JOK- 

 DAN & GILBERT, Synopsis, 905, 1883. 



1121. SIPHOSTOMA PELAGICTJM (Osbeck). 



Rings 17 + 35. Dorsal 29 to 32, commencing somewhat in advance of 

 vent, on 1 + 9 rings. Snout 2 in distance to base of pectoral. A distinct 

 ridge along the median line of the nuchal shields; supraorbital ridge not 

 continued over the temple; anterior part of the operculum with a faint 

 ridge ; shields without spines ; lateral line interrupted. Tail longer than 

 body; caudal pouch short, about 3 in total length. Color brown, nearly 

 plain, or with lower half of side of abdomen with vertical silver bars, 

 becoming broader and of a whitish color on the upper half; brown cross 

 bands occuriug alternately between the silver bars, so that the brown 

 bands are grouped together in twos or threes, the bands of each group 

 more or less confluent; in males the silvery bands are represented by 

 spots; a brown band through the eye and along the snout; dorsal fin 

 with oblique brown bands. Tropical parts of the Atlantic ; occasional 

 in the West Indies ; very common in the Mediterranean ; our specimens 

 from Venice, (pelagicus, living in the open sea.) (Eu.) 



Sungnatlms pelagicus, OSBECK, Dagbb'k Resa Ostindien, 305, 1757, open sea in floating seaweed; 



LINNAEUS, Syst. Nat., Ed. x, 1758, 337, after OSBECK; GUNTHER, Cat., vin, 165, 1870. 

 Syngnathits ethon, Risso, Eur. Merid., in, 1826, Nice. 



1122. SIPHOSTOMA ROUSSEAU (Kaup). 



Head 7-1- ; D. 26 to 28, on 1| -f 5 rings ; rings 16 -f 34 = 50. A small, 

 slender species, with the snout i longer than the rest of the head ; 

 top of head with a slight keel ; vent midway between tip of snout and 

 twenty-third caudal segment. Head almost 3 times in distance from tip 

 of snout to vent. Lateral line interrupted above the vent. Color plain. 

 West Indies, known from St. Lucia and Martinique ; also from Cuba, if 

 S. elucens is the same, as is not unlikely. (Named for Alexaudre Rous- 

 seau of Martinique. ) 



Syngnathtis roiissean, KAUP, Lophobranchii, 40,1856, Martinique; GfxTHER, Cat. vni, 163, 



1870. 

 Siphostoma rousseau, JORDAN, Proc. U. S. Nat. Mus., 1889, 647. 



