906. CONTRIBUTIONS TO NOETH AMERICAN ICHTHYOLOGY — IV. 

 Page 385. After Siphostoma punctipinne add : 



XX. Top of head with a strong interrupted median crest. (Corythrichthys Kaup.) 



616 (c). S. zatropis J. & G. 



Brownish, with ten broad dark cross-bands which encircle the tail 

 but do not cross the belly anterior to the vent ; snout whitish, with 

 two narrow dark bands; lower part of head with white cross-streaks. 

 Snout as long as postorbital part of head, keeled above. Head small. 

 Occiput and nape with a strong, compressed crest, on each side of which 

 is a longitudinal ridge ; opercle with a median keel. Ridges of body 

 very prominent. Tail one-third longer than rest of body. Dorsal on 

 1 + 4 rings. Dorsal rays 20 ; rings 18 + 30. Head 9. Gulf of Mexico, 

 north to Pensacola. 



(?? Corythroichthys albirostris Kaup, Lophobranchs, 25 : Syngnathiis albirostris Giin- 

 ther, viii, 170; Jordan & Gilbert, Proc. U. S. Nat. Mus. 1882, 264; Swain, Proc. U. S. 

 Nat. Mus. 1882.) 



Page 386. The identity of 019 {a) with the European H. heptagonus 

 {antiquorum) is questionable. None of the American examples seen by 

 as are spotted, and their spines are stronger than in European ex- 

 amples. 



aa. Top of head with a slight keel or none ; opercle without prominent longitudinal 

 ridge. 

 c. Dorsal covering 1 -}- 9 rings ; snout usually long. 

 d. Rings 20 to 21 -f 45 to 49 ; dorsal rays 39 to 46 ; top of head not keeled ; 



large, reaching a length of 18 inches Californiensk. 



dd. Rings 18 to 19 -f 39 to 42; dorsal rays 36 to 41 ; top of head slightly keeled. 



Griseolineatum. 

 CO. Dorsal covering 1 -t-7 (rarely 1 -{-6) rings. 



e. Rings 15 + 38; dorsal rays 29 to 30; top of head distinctly keeled; snout 



short AuLiscus. 



ee. Rings 16 to 19 before vent. 

 /. Dorsal fin low, not longer than head. 



g. Rings 18 + 31; dorsal rays 34 ; snout short; body little elongate. 



Bairdianum. 

 gg. Rings 17 to 19 + 36 to 41 ; dorsal rays 30 to 32 ; snout moderate or, 



rather short Leptorhynchum. 



ggg. Rings 17 to 18 + 31 to 32; dorsal rays 27; snout rather long; body 

 slender. 



Florida. 



ff. Dorsal fin very high, longer than head, its rays 28 to 32 ; rings 16 + 30 



to 33; snout rather short; belly in the female with a black carina; 



sides of body with narrow vertical silvery streaks in life; dorsal 



spotted Affuste. 



ceo. Dorsal covering 3 -h 5 rings ; rings 20 or 21 + 36 to 38 ; dorsal rays 32 to 37 ; 



beUy flat or slightly concave ; snout medium LouisiANiE. 



cccc. Dorsal covering 4 -»- 5 or 5 + 4 rings ; rings 18 to 20 + 36 to 40 ; dorsal rays 

 36 to 40; snout medium Fuscum. 



