Jordan and Evermann. Fishes of North America. 28-S9 



continuous with keel on snout; a strong supraocular ridge, beginning 

 opposite posterior end of nasal keel and continuing backward with 1 

 hiatus upon upper edge of opercle; just below this on the opercle another 

 longer but scarcely stronger ridge; another short ridge on anterior part 

 of opercle at level of lower part of eye ; opercles very convex, as if swollen 

 outward; keels on body and tail all strong; the 2 lateral keels on body 

 terminating on third caudal ring; the 2 lateral keels on tail beginning on 

 the last body ring, thus overlapping the body keels; median keel on side 

 well developed, terminating on sixteenth body ring; ventral keels strong; 

 abdominal keel very strong. Egg sac on first 18 caudal rings. Color yel- 

 lowish brown, with darker punctulations ; tip of snout white; cheek, 

 throat, and under parts of snout white, crossed by about 7 or 8 irregular 

 brownish bars extending downward and backward; opercles brown ; fins 

 pale. This species is related to C. albirostris of Heckel, differing from it 

 chiefly in the shorter snout, smaller dorsal, and fewer rings. Key West, 

 Florida, (cayorum, of the Keys; from Cayo Hueso, Bone Key, the original 

 Spanish name of the island of Key West.) 



Corythoichthys cayorum, EVERMANN & KENDALL, Bull. U. S. Fish Comni. 1897 (Feb. 9, 

 1898), 128, pi. 7, fig. 7, near Crawfish Bar, Key "West, Florida. (Type, a male 3J 

 inches long, No. 48784. Coll. Drs. Evermann & Kendall.) 



Page 774. Syngnathus cvquoreus is doubtfully American. Until a com- 

 parison of specimens can be made our species may stand as 



1138. SYNGNATHUS HECKELI (Kanp). 



Page 792. Lethostole, Jordan & Evermann, is identical with Chirostoma, 

 and the definition assigned is that of Chirostoma. 

 To the synonymy of Chirostoma estor add : 



Atherinichthys albus, STEINDACHNEE, Anzeiger der Kais. Akad. Wiss. Wien, 1894, 148, 

 Lake Patzcuaro, Mexico. (Coll. Princess Therese von Bayern.) 



Page 793. In Chirostoma humboldtianum the scales are serrulate. After 

 this species insert the following: 



1155(a). CHIROSTOMA GBANDOCULE (Steindachner). 



Head 4 ; depth 5| ; eye 3| in head ; interorbital width 4 ; pectoral fin 1 ; 

 ventral 2; caudal 1; anal base !, its greatest height If. D. V-I, 10; 

 A. I, 20 ; P. 15 or 16 ; scales 60 to 62-15 or 16. Upper profile of head merg- 

 ing gradually into that of back, rising slightly toward beginning of second 

 dorsal. Lower jaw slightly projecting ; posterior end of upper jaw reach- 

 ing eye. Teeth on maxillary sharp, brush-like, in 3 or 4 rows, the inner 

 teeth of the maxillary and the outer teeth of lower jaw somewhat enlarged 

 and close set. Cheek narrower than in C. linmboldtlanum and C. estor, and 

 with 4 rows of scales. Origin of first dorsal midway between anterior bor- 

 der of eye and base of caudal, the second dorsal | diameter of eye nearer 

 base of caudal than hinder border of eye; greatest height of second dorsal 

 scarcely greater than base of fin . Longest anal ray about 1 in base of fin ; 

 dorsal and anal concave on free border; origin of anal nearly an eye's 

 diameter in front of that of second dorsal; caudal deeply incised, the mid- 



