1996 Bulletin 4.7, United States National Museum. 



still more ornate, in that they possess along the back a number of broad 

 dark bars alternating with lighter bars, the former confluent below, with 

 the ground color of the sides. In the largest specimen, 7 cm. long, the 

 ventral fins extend only to base of third anal ray. There are no tuber- 

 cles on the rays, and the membranes extend nearly to tips of the 2 outer 

 rays, and length of the inner ray. The ventral spine is slender, nearly 

 as long as the inner ray, and is firmly adnate to outer ray. The smaller 

 specimens are, respectively, 4 cm. and 3.5 cm. long, the veiitrals reaching 

 in one to front of anal, in the other to vent; fins are finely cross barred, 

 more variegated than in the type. KnoAvn only from Saghalien Island, 1 

 specimen 92 mm. long (Herzenstein), and Iturup Island, where 3 specimens 

 were obtained by the Albatross in 1896, our description from the latter. 

 (Named for its discoverer, Dr. Zander.) 



Argyrocottus zanderi, HERZENSTEIN, Melanges Biol. Ac. Imp. Sci., xm, 1892, 219, Korsa- 

 kow, Saghalien. (Type, No. 9679, Mus. St. Petersburg. Coll. Dr. Zander.) 



738. POROCOTTUS, Gill. 



Porocottus, GILL, Proc. Ac. Nat. Sci. Phila. 1859, 166 (quadrifilis). 



This genus contains small sculpins, distinguished from Myoxoceplialus by 

 the presence of 4 spines on the opercle, the uppermost being curved or 

 hooked upward. Lower jaw included; 1 suprascapular spine; lateral 

 line modified, giving off pairs of diverging branches, with pores at their 

 ends. Cirri above eye and on nape. Northern Pacific; the species not 

 well known and possibly reducible to 1 or 2. (rtopot, pore; HOTTO$, 

 Coitus.) 



a. Dorsal rays VIII, 13 or 14 ; anal rays 11 or 12. 



b. Opercle with 3 ridges, the upper ending in a sharp spine; pores of lower jaw 

 small; fins low. SELLARIS, 2367. 



bb. Opercular spines well developed ; fins high ; pores well developed. 



QUADRATUS, 2368. 



bbb. Opercle undescribed. POLARIS, 2369. 



bbbb. Opercle without rib or spine. QUADRIFILIS, 2370. 



aa. Dorsal rays VI, 16; anal rays 14; lower jaw with large pores; opercular spines 



obsolete. TENTACULATUS, 2371. 



2367. POROCOTTUS SELLARIS (Gilbert). 



Head 24 to 3 in length ; depth 3f. D. VIII, 14 (13) ; A. 10 to 12 (usually 

 11) ; P. 16. Pairs of pores in lateral line 32 to 34. Branchiostegals 6. 

 Head cuboid, the anterior profile of snout subvertical, the greatest width 

 a trifle more than the depth at occiput. Cheeks subvertical. Interorbital 

 region elevated, the supraorbital rim furnished posteriorly with a low 

 tubercle which usually bears an inconspicuous cirrus. The interorbital 

 space is rather wide, transversly concave, its least width 2^ in eye. 

 Occipital depression well marked, the ridges unbroken, straight, converg- 

 ing rapidly backward, the distance between their tips but f that between 

 their anterior ends. From the latter, 2 low ridges converge for a short dis- 

 tance onto the floor of occipital depression. The ridges do not terminate 



