107. COTTID.E COTTUS. 707 



species really has palatine teeth, it cannot belong to this genus. It 

 may be a species of Centridermicliffiys. 



(Pallas, Zoogr. Rosso- Asiat. iii, 135, 1811; Cuv. & Val. iv, 177: Mcgalocottus platy- 

 cephalus Gill, 1861, 166.) 



aaa. Head with, tentacles above; lateral line without plates. (Porocottus* Gill.) 



1O5. C. verrwcosMS Bonn. 



Very dark brown, whitish below; spinous dorsal dark, with a median 

 and a posterior light band; soft dorsal and pectorals each with 5 dark 

 bands; anal whitish, with a dark stripe; ventral s pale. Nasal spines 

 sharp; a short tentacle above each eye and one on each side of the 

 vertex; vertex and interorbita-1 space deeply concave; crown, nape, and 

 interorbital region with small dermal warts; upper preopercular spine 

 as long as short diameter of eye; eye 4 in head, as long as snout; max- 

 illary reaching to below middle of eye, half length of head, longer than 

 fourth dorsal spine. Pectoral reaching front of anal; skin smooth; 

 lateral line with numerous short vertical accessory branches, placed 

 opposite each other. No pore behind last gill. Head 2A ; depth 4^. 

 D. XI-1C; A. 15; V. I, 3; P. 17; C. 12; B. 6. L. 3 inches. Plover 

 Bay, near Bering's Straits. (Bean.) 



(Bean, Proc. U. S. Na^ Mus. iv, 152, 1881.) 



1O6. C. niger Bean. 



Almost black; sides mottled with lighter brown, sometimes with 

 round white blotches on belly and sides; pectoral plain or with white 

 blotches. Nasal spines blunt, covered with skin; no spines above 

 orbits or on occiput; no sharp spines on head except the two upper 

 preopercular spines, which are almost concealed; the uppermost as 

 long as eye, 6 in head, and equal to snout or interorbital space; top of 

 head with fine dermal granulations, the vertex with numerous slender 

 tentacles; a soft tentacle of moderate length above eye; jaws equal; 

 maxillary longer than fourth dorsal spine, 2 in head, reaching hinder 

 margin of orbit. Caudal and ventrals each half length of head; pec- 

 toral not reaching vent; skin smooth. A small slit behind last gill. 

 Head 2. D. IX-1G; A. 12; Y. I, 3; P. 16; B. 6. Saint Paul Island, 

 Bering's Sea. (Bean.) 



(Bean, Proc. U. S. Nat. Mus. iv, 151, 1881. > 



1O7. C. quadrifilis (Gill) J. & G. 



Purplish, irregularly spotted with black; a dark spot below eye, and 

 another on maxillary; fins mostly variegated with black; a dark spot 



* Gill, Proc. Acad. Nat. Sci. Pliila. 1859, 166: type Porocotius quadrifilis Gill. 

 pore; Korrof, Cottus.) 



