.I-XURICIITHTS. 117 



acute angle. Dorsal I 7, the siiine not bearing a long filament. Anal 28, considerably produced 

 anteriorly, the longest rays, when laid back, extending beyond the end of the base of the tin. Pectoral 

 spine bearing a long filament ; ventrals reaching the anal. Caudal deeply Ibrked. Caudal peduncle 1| 

 as long as deep. Silvery, back bluish ; vertical fins more or h-ss dusky. 



Ilah. Pacific Coast of Tanama {Jordan). — N.W. Ecuador {liosenhery). 



Two specimens, 220 and 280 mm. in length. 



Probably both this and the preceding species extend northwards to Lower California, 

 but it is imposbible to say to which the northern records should apply. 



3. ^lurichthys isthmensis, sp. n, (Tab. XV. fig. 1 and Tab. XIX. fig. 1.) 



Depth of body nearly ccjual to tbc length of head, wliich is 4 to 4| in the length of the fish. Breadth of head 

 li^ in its length ; snout longer than eve, the diameter of whicli is 44 to 4| in the length of head. 

 Lower jaw scarcely shorter than the upper ; vomerine patches of teeth united, considerably broader than 

 the palatine patches ; maxillary barbel extending nearly to the ventral fin. 14 gill-rakers ou the lower 

 part of the anterior arch. Head covered with skin ; upper profile of head straight or slightly convex ; 

 occipital process shaped nearly as in the preceding species, uncovered by skin, pitted, broader than long, 

 its breadth ^ the length of head. Dorsal I 7, the spine not bearing a long filament. Anal 29-3(1. 

 slightly produced anteriorly, the longest rays, when laid back, not nearly reaching the end of the base of 

 the fin. Pectoral spine bearing a long filament ; ventrals not reaching the anal. Caudal deeply forked. 

 Caudal peduncle 14 as long as deep. Silvery, back bluish, 



Hal). Atlantic Coast of Panama, Colon [Boucard). 

 Two specimens, 100 and 210 mm. in total length. 



4. ^lurichthys marinus. 



^lurichthi/a marinus (Mitchill, 181.5), Giravd, Rep. U.S. Mex. Ijouud,, Fishes^ p. .31, t. 14 



(1859) ; (iiiuth. Cat. Fish. v. p. 178 (1864). 

 Felichthys marinus, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 118. 



Distance from tip of snout to origin of dorsal about }^ the length of the fish. Occipital process narroA\ ed 

 posteriorlv, with straight or concave lateral edges. Maxillary barbel extending to pectoral (adult) or 

 ventral (young) ; vomerine and palatine teeth forming a continuous or subcontiuuous band ; about 

 8 gill-rakers on the lower part of the anterior arch. Dorsal I 7 ; filamentous ray usually not reaching 

 the adipose fin. Anal 22-24 ; longest ray nearly as long as or shorter than the base of tiie fin. 

 Pectoral spine f to | the length of head. Silvery, back bluish. 



Hah. North America, Atlantic Coasts and Rivers from Cape Cod to Texas ; probably 

 occtrrring in Northern Mexico. 



Here described from three specimens, 180 to 400 mm. in total length. 



5. .Sllurichthys bahiensis. 



Gak'ichthijs hahiensis, Casteln. Auim. Amer. Sud, Poiss. p. 37, t. 18. fig. 1 (18.J3). 

 yElurichthijs lougispinis (part.), Giiiith. Cat. Fish. v. p. 178 (18G4). 

 Felichthys hahiensis, Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1896, p. 118. 



Distance from tip of snout to origin of dorsal about i the length of the fish. Occipital process narrowed 

 posteriorly, with straight or concave lateral edges. Maxillary barbel nearly reaching ventral tin ; 

 vomerine and palatine teeth forming a continuous or subcoutiuuous band ; 6 gill-rakers ou the lower 



