GILBERT AND STAUKS — FISHES OF PANAMA HAY 33 



Head 3| in the Icnirth; clcjitli 4 J; tip of snout to front of dorsal 2|; distance l^etween dorsals 

 3j; distance from base of inner ventral ray to front of anal 6f. Kye 4 in interocular, 8 in head; 

 greatest width of head i| in its length; length of snout Zf^-; width of mouth 2g; distance bet\vcen 

 anterior nostrils 6| (55 m/iniliii); |>ectoral spine equaling length of head behind front of pupil; dorsal 

 sjjine equaling length of head behind posterior margin of pupil; base of adipose tin equaling Iwse of 

 (liiiNal behind tile spine. 



The snout is convexly rounded anteriorly, less depressed than in fiirthii. The maxillary 

 IkitIkI l)arely reaches gill-opening, when laid horizontally backward; the outer mental barbels reach 

 margin of gill-membrane on under side of head. 



The [wlatine patches of teeth are narrowly elliptical, their length 1 \ times the diameter of the 

 ori)it: they are narrowly sejxirated in front, the inters])ace :3 diameter of pupil; the inner mandibular 

 teeth next the symphysis are coarsely granular, like the palatine teeth. 



(.ill-membranes broadly united to the isthmus, without free foltl, the width of the complete 

 union w iih the isthmus more than twice the diameter of the eye (much narrower, less than diameter of 

 eye m fiirthii). Gill-rakers rather strong, 5+9, the longest § the diameter of the eye. 



Top of head much more coarsely granulated than in fiirthii; the groove is confined to the 

 granulated area, terminating at a point § diameter of pu])il in front of the base of the occipital process. 

 Anteriorly, the fontanel depression is evident, but contains no definite groove at any point. The occijjital 

 process is very broad, wider at base than long, much shorter than in fiirthii, the median portion not 

 elevated as in the latter; a raised line representing an obsolescent keel is present on the median line of 

 the anterior two-thirds. The predorsal plate is narrdw, sculptured like the occiput on its anterior 

 transverse portion only. 



The dorsal and pectoral s])ines are slender, rugose anteriorly, but without teeth except near 

 the tips; the teeth on the posterior margin of the dorsal spine are scarcely visible, being smaller than 

 in fiirthii; the inner pectoral teeth are stronger and less numerous than \\\ fiirthii. The type is a male, 

 with the \entral fins failing to reach the front of the anal by half their length. The vent is midway 

 between ventrals and front of anal. The pectoral pore is small, slit-like. 



The skin is thicker and less delicate than in fiirthii, and the color is darker, the up]K-r parts 

 dark i)re)wnish, with obscure bluish reflections. Barbels all more or less dusky. 



50. Tachysurus multiradiatus (Guniher). 



Not seen by us. The type specimen was rccoftlcd by Kner & Steindacbiier, 

 1864, p. '227, as Bagrua. ? arioides, from the Kio Uayaiio near Panama. A second 

 specimen has now been listed by Bonlenocr, 1<S!)1, p. 2, fioin Rio Cianati, Daricn. . 



51. Cathorops hypophthalmus (Steindachner) . 



Known oidy from the types, and from two specimens secured by (Jilbert in 

 1S81; all from Panama. 



52. Cathorops gulosus (Eigenmann £• Eigenmann). 



Two specimens were secured, 230 and 21.") mm. long. Xone others are 

 known save the types, from Panama, which are in the Museum of Comparative 



Zoology. 



Our .specimens agree for the most part with Eigenmann's description. The 



following details may be placed (jn record: 



