190 CALIFORNIA ACADEMY OF SCIENCES. 



Pectoral spine two or three times as thick as the dor- 

 sal spine, broad lamellae in front and sharp recurved 

 teeth behind; its length 2 in head. 



Color: between pectorals and anal dark brown. ; lower 

 part of head, a narrow band above pectorals and along 

 sides spreading over the lower f of the tail white (yellow 

 in life), region about this brownish; a round white spot 

 on each side of dorsal spine; orbit bordered with white 

 above, head and ante-dorsal region with darker spots or 

 vermiculations; sometimes all of lower parts are white. 



Head 3J; depth 4f ; Br. 9; D. I, 7; A. 9. 



XXVIII. SCIADES. 



Sciades Miiller and Troschel, Horse Ichthyol. iii, 8, 

 1849 (sp.) 



Sciades Bleeker, Ichthyol. Arch. Ind. Siluri. 62 and 

 66, 1858 (pictus). 



Leiarius Bleeker, Nederl. Tijdschr. Dierkunde i, 99, 

 1863 (longibarbis = pictus). 



Sciadeichthys Bleeker, Nederl. Tijdschr. Dierkunde i, 

 99, 1863 (pictus). 



Sciadeoides Eigenm. & Eigenm. Pruc. Cal. Acad. 2d 

 Ser. vol. i, 1888, 136 (marmoratus). 



Type : Bagrus pictus M. & Tr. 



Miiller & Troschel do not indicate a type for their sub- 

 genus Sciades. Dr. Bleeker in 1858 restricted it to pictus 

 but afterwards to emphysetus, the first species mentioned 

 by Miiller & Troschel. 



The genus is chiefly marked by the number of dorsal 

 rays, 10 or 11, and by the small patches of palatine 

 teeth which are widely separated from the vomerine 

 patches. 



ANALYSIS OF THE SPECIES OF SCIADKS. 



a. Occipital process large, triangular, meeting the dorsal plate. Entire 

 postorbital portion of the head granulated. Width of the head 1 J in its 

 length. (SriADES.) 



