369 



1905.] NATURAL SCIENCES OF PHILADELPHIA. 



Of second dorsal, both upper and lower edges of caudal and also 

 outer portions of rays of last two fins more or less scabrous. Lateral 

 line distinct till below last dorsal rays, of elevated continuous tubes 

 with pronounced pores at regular intervals and most developed 



""''orkhi^of spinous dorsal midway between tip of snout and base of 

 sixth dorsal ray, fourth spine longest and others graduated more or 

 less down, edge of fin rounded. Origin of second dorsal about mid- 

 way between tip of snout and tip of caudal. Fifth dorsal ray longest 

 several others immediately following subequal and others graduated 

 down with edge of fin rounded. Anal inserted a little m advance 

 of second dorsal, median rays longest, and margin of fin rounded. 

 Caudal truncate, with 6 branched rays, and corners posteriorly a 

 little pointed. Pectoral large, reaching vent, fourth ray ongest, and 

 base of first ray about opposite second spine on preopercle. Ventral 

 rather long, second ray longest, and reaching f of distance to vent. 

 Vent large, close in front of anal. 



Color in alcohol mostly more or less uniform brown above, ower 

 surface paler. Head a little paler brown than trunk. Flanks or 

 upper side of back tinged with dusky. Fins all browmsh and ven- 

 trals paler or like belly. Dorsals paler basally, outer portions o 

 membranes dusky. Caudal similar. Anal pale brownish, marked 

 on membranes medianly and marginly with brownish so that 

 two rather ill-defined longitudinal bands are formed. Pectoral pale 

 basally, especially lower rays, and distally between each ray on 

 membrane usually a longitudinal dusky streak. Ventral plain. 



Iris slaty. 



Length 7 inches. ai i . 



Tvpe No 7 "^03 W. L A. P. ? . Point Barrow, northern Alaska. 

 November '21', 1897. E. A. Macllhenny. Also another smaller 

 example, paratype, with same data. It is a c?. It differs a lit le 

 in the armature of the opercle as the spines are a little shorter. The 

 upper maroin of the second dorsal is also not deeply scalloped, like 

 that of male examples of 0. hexacornis, the free ends of each ray 

 hem^r onlv a short slender filament. The anterior margins of the 

 first dorsal rays are a little more scabrous. In most every other respect 

 it agrees more or less, the color markings varying a litt e perhaps. 

 The differences are best appreciated by a comparison of the figures. 



Upon comparison with examples of 0. hexacornis of similar size, 

 the characters indicated by Dr. Scofield for the ^^Oncocottus sp. 

 incog" which he mentions from Point Barrow are found to disagree. 



