238 PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



aa. Top of head with a slight carination or with uone ; opercle without prominent 

 longitudinal i idge. {Sij)}iostoma.) 

 c. Dorsal tin covering 1 + 9 rings; snout usually long; size large. 



d. Rings 20 to 21 + 45 to 49 ; D. 39 to 4(5 ; top of head without keel. 



Californiense, 3 

 dd. Rings 18 to 19 + 39 to 42 ; D. 36 to 41 ; top of head slightly keeled. 



Griseolineatum, 4 

 cc. Dorsal fin covering 1 + 6 or 7 rings. (Occasionally 2 + 6 in S. floridce.) 



e. Rings 15 -}- 38 ; D. 29 to 30 ; top of head distinctly keeled ; snout short. 



AuLiscus, 5 

 ee. Rings before vent, 16 to 19. 



/. Dorsal tin low, not longer than head. 



g. Rings 18 + 31; D. 34; snout short; body comparatively stout; tail 



short Barijar,e, 6 



gg. Rings 17 to 19 + 36 to 41 ; D. 30 to 32; snout moderate or rather short; 



body slender Leptouu ynchis 



/ 



ggg. Rings 17 to 18 + 31 to 33 ; D. 27 to 31 ; snout rather long.FLORlD.E, 8 

 ccc. Dorsal fin covering 3 + 5 (sometimes 3 + 4) rings. 



h. Dorsal fin very high ; rings 16 to 18 + 30 to 33 ; D. 25 to 32 ; belly in 

 female with black carina; snout rather short; sides of body with 



narrow vertical streaks in life ; dorsal spotted Affine,* 9 



hh. Dorsal fin not very high ; rings 20 to 21 + 36 to 38 ; D. 32 to 37 ; belly 



flat or slightly concave ; snout moderate Louisian,e, 10 



cccc. Dorsal fin covering 5 + 4 or 4 + 5 rings ; rings 18 to 20 + 36 to 40 ; D. 36 



to 40 ; snout moderate FuscuM, 11 



ccccc. Dorsal tin covering 2 + 5 to 6 rings ; rings 18 + 33 ; D. 29 to 31 ; opercle 

 not keeled ; body deep; its greatest depth in adult females equal to width 

 of 4 body rings (2| in males) ; snout about If in head; belly in females 

 angulate, without keel; dorsal pale, marked with dark green; opercle 



and snout barred with white McKayi, 12 



cccccc. Dorsal fin covering + 4 (occasionally A + 4) rings ; top of head slightly 

 keeled ; snout very short, 3 in head ; rings 16 + 37 to 39 ; D. 17 ; belly 

 convex ; color in spirits dusky gray, with about 13 conspicuous cross- 

 bars, each wider than a body ring Crinigerum, 14 



1. Siphostoma zatropis Jordan & Gilbert. 



Two si)eciineus taken at Key West, each witli rings IG + 27 ; dorsal 

 with 22 rays, covering 1 + 4 rings. 



6. Siphostoma barbarae Swain, sp. nov.t 



8. Siphostoma Floridae Jordan & Gilbert. 



Four specimens obtained, with dorsal rays 27 to 29, covering 1 + 7 

 iings. In addition to these we have referred to this species two female 



*Note. — In the key to this genus, formerly published by Mr. Swain (Froc. U. S. Nat. 

 Mus., 1882, 308), this species was inadvertently placed under cc, "Dorsal fin covering 

 1 + 7 rings," instead of under ccc, " Dorsal fin covering 3 + 5 rings." 



This erroris copied in Jordan &. Gilbert's Synopsis Fishes N. A., p. 906. It is here 

 corrected. 



t Siphostoma larhanv Swain, %\i. uov. This name is proposed for the specimen taken 

 by Andrea Larco at Santa Barbara, Cal. (No. 31253 U. S. Nat. Mus.), described by Mr. 

 Swain, Proc. U. S. Nat. Mus., 1882, 311, under the erroneous name of Siphostoma 

 iairdiannm. We are informed by M. Alexandre Thominot, of the Museum of Paris, who 

 has re-examined the type of Sgugnathas bairdianus, that the specimen has the dorsal fin 

 on 3 + 5| rings, as stated by M. Dumeril. S. bairdianum is therefore a dilferent 

 scpeies, apparently closely allied to S. affine. 



