906 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY — IV. 
Page 385. After Siphostoma punetipinne add: 
acx. Top of head with a strong interrupted median crest. {Corytlirichthys Kanp.) 
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 bauds ; 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. Eidges of body 
very prominent. Tail one-third longer than rest of body. Dorsal on 
1 + 4 rings. Dorsal rays 20 ; rings 18 -p 30. Head 0. G ulf of Mexico, 
north to Pensacola. 
(?? Corythroichthys albirostris Kaup, Lophobranchs, 25 : Syngnathus alMrostris Gun- 
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 
us 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. 
0 . Dorsal coveilng 1 -p 9 rings ; snout usually long, 
d. Rings 20 to 21 -p45 to 49; dorsal rays 39 to 46; top of head not keeled; 
large, reaching a length of 18 inches Californiense. 
dd. Rings 18 to 19 -p 39 to 42 ; dorsal rays 36 to 41 ; top of head slightly keeled. 
Griseolineatum. 
CO. Dorsal covering 1 -p 7 (rarely 1 -p 6) rings. 
e. Rings 15 -1-38; 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-p31; dorsal rays 34; snout short; body little elongate. 
Bairdianum. 
gg. Rings 17 to 19-1-36 to 41; dorsal rays 30 to 32; snout moderate or 
rather short Leptorhynchum. 
ggg. Rings 17 to 18-f-31 to 32; dorsal rays 27; snout rather long; body 
slender. 
Florid.®. 
ff. Dorsal fin very high, longer than head, its rays 28 to 32; rings 16 -j- 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 Affine. 
ccc. Dorsal covering 3 -j- 5 rings ; rings 20 or 21 -f 36 to 38 ; dorsal rays 32 to 37 ; 
belly flat or sligl^tly concave; snout medium Louisian je. 
ccce. Dorsal covering 4 -f- 5 or 5 -P 4 rings ; rings 18 to 20 -f 36 to 40 ; dorsal rays 
36 to 40 ; snout medium Fuscum. 
