SILURUS (PARASILURUS) ARISTOTELIS. 



Glanis Aristotelis Ag., 1856, Pr. Araer. 



Acad., 333 (mimed). 



BY S. GARMAN. 



B. 13 (12-14); D. 3; A. 72 (67-76); C. 18 ; V. 9 

 (9-10); P. 1 + 11 (11-12). 



IN shape this species bears much resemblance to the /Si- 

 Iwus glanis of Linne. Its body is elongate, depressed 

 anteriorly, strongly compressed from the vent backward, 

 the greatest depth in an eight-inch specimen being about 

 one-fifth of the length without the caudal fin, and that por- 

 tion of the length behind the vent being rather more than 

 seven-elevenths of the total length. The head is broad, 

 depressed, slightly arched across the crown, little less 

 than one-fifth of the entire length, a trifle more than one 

 and one-third times as long as wide, and is broad and 

 rounded on the snout. Seen from above, the lower jaw 

 appears to be the longer by the width of the band of teeth. 

 There are but four slender threadlike barbels, of which the 

 maxillary do not quite reach the end of the pectoral, not 

 being one and one-half times as long as the head, while the 

 mandibulary are less than half as long as the maxillary. 

 The eye is so small that its diameter is contained more 

 than four times in the interorbital space, more than twice in 

 the length ot the snout, more than eight times in the length 

 of the head, and is nearly equal to the distance from the 

 base of the barbel. It is situated above and close to the 

 (56) 



