Jordan and pA'crtnann. — Fishes of A'orth America. 123 



front, entering the notched occipital process, \ as wide as the skull be- 

 hind the eye; surface of the bones striate rather than granulate. Eye 

 small, 6 to 7 in the interorbital. Maxilhuy barbels reaching tips of ven- 

 trals. D. I, 6 ; A. 21. (Cuvier & Valenciennes.) Cayenne. Like the 

 next, known only from the original description, liotli apparently allied 

 to S. troscheli. (Named for C. .1. Teniniinck, then director of the. Musouni 

 of Holland.) 



Bagriisli-iiimhichimiK!!, OliviER & Valevcienner, xiv, 403, 1839, Cayenne. 

 Arins temmiiichii, Gi'NTHER, Cat., v, 151, 18()4, af'tiT Ciivipr & Va1fiicifnne.s. 

 Tacbisiiriis lemmiHckiaiiitf:, Eigenmann, S. A. Nematoguathi, 53, 1890. 



168. SCIADEICHTHTS FLAVESCKNS, (Cuvipr k Valenciennes). 



Paliitine bands of teeth with a backward projection on the inner 

 margin. Dorsal plate enlarged, pointed in front, entering the notched 

 occipital process ; eniarginate behind, as wide as the cranium behind eye; 

 granulations not extending forward to eyes ; opercle and humeral process 

 striate, not granular. Eye very small, 9 in interorbital. Dorsal and pec- 

 toral spines granular, moderately serrate. Upper jaw little longer; pala- 

 tine bands of teeth oval. Maxillary barbel extending to middle of 

 pectoral. Ventral shorter than pectoral fins ; adipose ^ less than anal 

 fin. Upper caudal lobe little the longer D. I, 7 ; A. 18. (Cuvier & 

 Valenciennes.) Cayenne. (/fli!esceH.s, yellowish.) 



Bagriis Jlivesmis, Cuvier ct Valenciennes, xiv, 462, 1839, Cayenne. 



Arius flivesceus, Ginther, Cat., v, 151, 1SG4. 



Tachimrns fliwescens, Eioenmann, S. A. Nematognathi, .53, 1890. 



169. SCIADEICHTHTS MESOPS, (Cuvbr A V.ilenciennps). 



Palatine teeth villiform, the band with a backward projection; poste- 

 rior nostrils not connected by membrane. Dorsal plate enlarged, notched 

 in front, receiving the point of occipital process. Eye midway between 

 snout and preopercle ; occipital process twice as long as broad, its tip 

 mucronate, corresponding to a notch in the dorsal plate; top of head 

 granulated to front of eyes; ojiercle granulated superiorly; humeral pro- 

 cess as long as high, strongly granulated. Ventrals as long as pectorals. 

 D. I, 7 ; A. 18. (Cuvier & Valenciennes.) Guiana, (fifnar, middle; 

 (o^p, eye. ) 



Bagnts mesops, CrviER A Valenciennes, xiv, 450, 18.39, Guiana. 

 Arim mennpn, Gi'NTHER, Cat., V, 145, 1864. 

 Titrhisuriis mexopit, Eigenmann, S. .\. Ni'matnjjnatlii, 57, 1890. 



170. SCIADEICHTHYS PUOOPS, (Ciivior .t Valcncionncs). 



Head 4 to 4^; depth, 7. D. I, 7 ; A. 18. Palatine bands of teeth with a 

 backward projecting angle; posterior nostrils not connected by membrane; 

 dorsal plate large, butterfly shaped, notched in front, receiving the point 

 of occipital process ; bones of head coarsely granular. Eye nearer snout 

 than to preopercle, IJ in snout, about 3 in interorbital. Jaws snbeiiual ; 

 occipital process broader than long, mucronate at tip; opercle striate. 

 Body slender and elongate ; head depressed ; teeth on roof of mouth in (> 

 contiguous patckes. Caudal deeply forked, the longer upper lobe 4i in 



