556 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



the head. The teeth are in the usual bands, that of the upper jaw 

 having an outer series a little enlarged. The length of the barbel 

 is equal to the interorbital width. The gill-membranes unite in a 

 free fold directly below the preopercular ridge; there are seven 

 branchiostegal rays. 



The scales are armed by numerous rather long spinules arranged 

 in quincunx order; the last spinules project beyond the margin of 

 the scale. Nine rows of scales separate the origin of the second 

 dorsal fin from the lateral line series. 



The anus is about equidistant from the origin of the anal and 

 from the base of the outer ventral ray; it is preceded by a naked 

 area. 



Fig. 3S. — Lioxcitus infraxudis. Type. 



The second dorsal spine is longer than the distance between the 

 tip of snout and the origin of the anal fin ; the basal half of the spine 

 is armed with 11 widely spaced denticulations. The pectoral and 

 ventral fins are inserted on the same vertical. The inner ventral 

 rays, when depressed, fall short of the origin of the anal. 



Color in alcohol, gray-brown, becoming blackish on the belly, 

 opercles, and nasal fossa; pale on the jaws and the underside of the 

 snout. All of the fins, excepting the second dorsal, are black. The 

 buccal and branchial cavities are lined with black, without light 

 margins except along the bands of teeth and at the corners of the 

 mouth; the parietal peritoneum is brownish black laterally, but 

 silvery with black spots ventrally (except about the anus). 



Measurements in humdredths of length to anus (50 mm.) — Length 

 of head, 82; length of orbit, 21: width of interorbital, 17; width of 

 suborbital, 10; orbit to preopercle, 31; length of snout, 24; length of 



