Jordan and Evermann. — Fishes of North America. 2773 



Jordan (Proc. Ac. Nat. ^ci. Phila. 1883, 282) adds the following note on 

 the type of this species: ''Fontanel extending backward iu a deep and 

 narrow groove which reaches the occipital process. Middle of top of head 

 smooth, much as in A. platypogon." 



The following account is given by Eigenmann & Eigeumann (Nema- 

 tognathi, 78) : 



Head 3f ; depth 5. D. I, 7; A. 18. Body about as deep as wide, taper- 

 ing to a slender peduncle. Head flat, depressed in front, top of the head 

 coarsely granular; opercles smooth or with faint striations; humeral 

 process slightly granular, covered with skin; the greatest depth of the 

 head 1* in its length, greatest width 1^ to If; the width at angles of the 

 mouth 2^. Occipital process wider than long; fontanel open to above 

 the posterior margin of the eye, with a deep backward-extending groove. 

 Interorbital area smooth, without ridges. Eye 2 in snout, 7 in head, 3f 

 to 4 in the interocular, 2* in the interorbital. Maxillary barbels reaching 

 slightly beyond base of pectorals, mental barbels | toward the gill open- 

 ing, the postmeutals 4 a diameter of the eye behind the gill opening or 

 farther. . Upper jaw longer; teeth all villiforni ; vomerine teeth in 2 small 

 ovate patches, which are separated from each other but joined to the much 

 larger palatine patches. Gill membranes forming a m(xlerate fold across 

 the isthmus. Gill rakers 5 -f- 12. Pectoral pore large; vertical series of 

 pores present. Distance of dorsal fin from tip of snout 2^ to 2| in the 

 length, the spine rather stout. If in head, its outer edge granular toothed, 

 its inner edge with short, recurved teeth; distance of the adipose tin from 

 the dorsal 3| to 3^ in the length; adipose tin slightly longer than high, 

 shorter than the dorsal fin. Caudal 4 iu the length ; anal emarginate, 

 little longer than high; ventrals If to 2 in the length of the head; pec- 

 toral spine 1^ in head, its anterior margin granular toothed, its inner 

 edge with long, straight teeth. Plumbeous, silvery below ; fins duskj', 

 inner surface of veutrals and pectorals dark. One female 0.28 m., Panama. 

 One male 0.21 m., Panama. 



187(a). GALEICHTHTS (JILBERTI, Jordan & WUliams. 



Head 3| to 4; width of head 5^; depth 5. D. I, 7; A. IV, 14. Body 

 comparatively elongate, the head depressed but not very broad, somewhat 

 broader than high; eye rather large, 5 to 6 in length of head; width of 

 interorbital space 2J in head; breadth of mouth If; length of snout 3|^. 

 Teeth all villiform; bands of vomerine teeth separated by a rather wide 

 interval, each small, roundish, confluent with the neighboring palatine 

 band, the junction marked by a slight constriction; palatine band ovate, 

 broad behind, varying considerably in size and somewhat in form, the 

 width ranging from ^ diameter of eye to f, being generally largest in 

 , adults; band of palatine teeth without backward prolongation; band of 

 maxillary teeth rather broad and short, its length about 5 times its 

 breadth. Maxillary barbel flattened at base, reaching a little past base of 

 pectoral in young, scarcely to gill opening iu adult ; outer mental barbels 

 2 in head, inner 3. Gill rakers 4 -\- 12. Dorsal shield very short, narrowly 

 crescent-shaped, its length on median line not more than i that of one 



