2000 Bulletin 47, United States National Museum. 



spine, the absence of a longitudinal rib on the opercle r numerous pores, 

 and the presence of only 5 branchiostegal rays. (Gill. ) " 

 Not recognized by recent collectors, (quatuor, four; filum, filament.) 



Porocottus quadrifilis, GILL, Proc. Ac. Nat. Sci. Phila., 1859, 166, Bering Straits. 

 Coitus quadrifilis, J ORDAN & GILBERT, Synopsis, 708, 1883. 



2371. POROCOTTUS TENTACULATUS (Kner). 



Head 3|. D. VI-16 or 17; A. 14 or 15; V. I, 13, P. 14 or 15. Head small, 

 mouth small, the lower jaw included; eye large, 3 in head, longer than 

 snout; interorbital space channel-like, less than i diameter of eye; a 

 sharp spine before each eye, on which is a fringed tentacle ; supraocular 

 ridge ending in a blunt, forked, bony knob, on which is a small thread- 

 like tentacle; the quadrangular interspace between these two sets of 

 tentacles is excavated; preopercular spine long, curved upwards, f diam- 

 eter of eye; the second spine much shorter and turned backward; 2 

 spines lower, turned downward; subopercle with a spine turned down- 

 ward; a similar one on opercle; maxillary reaching to middle of eye; 

 lower jaw with large pores. Dorsal fins low, the rays flexible, the two 

 close together; ventrals reaching vent; pectorals past beginning of anal. 

 Skin of body wholly naked; lateral line complete, bending downward on 

 caudal peduncle. Color clear brown, darker above, the head above with 

 a few large dark brown spots, which form obscure bands, 1 of these from 

 front of eye across upper lip, second broader from eye across subopercle; 

 lower jaw speckled; throat and breast plain yellowish; back with about 

 6 dark cross bands, those most anterior the broadest; sides of body with 

 a network of brown streaks around pale spots; a large bright yellow spot 

 at base of caudal; fins all finely spotted with whitish and dotted with 

 dark, the caudal with 5 or 6 dark cross bands; pectorals faintly barred 

 (Kner.) A single specimen, 2 inches long, said to be from Singapore, which 

 is of course an error. It probably came from the Pacific coast of Asia, 

 perhaps from Yezo or Decastris Bay. As Kner has indicated, this species 

 has much in common with Porocottus quadrifilis, but the fin rays are more 

 numerous. It is, however, not impossible that the two are identical and 

 both may be identical with P. sellaris and P. polaris. (tentaculatus, bear- 

 ing tentacles.) 



Cottus tentaculatus, KNER, Sitzber. Akad. Wiss. Wien, LVIII, 1868, 22, taf. 5, fig. 12, Singa- 

 pore ; evidently an error. (No. 5591a Wien Mus.) 



739- ONCOCOTTUS, Gill. 

 Oncocottus, GILL, Proc. Ac. Nat. Sci. Phila. 1862, 13 (quadricornis) . 



This genus contains small sculpins allied to Myoxocephalus, but with 

 4 preopercular spines, the uppermost being straight; a rather large slit 

 behind the last gill arch ; the lateral line chain-like in form. Mouth small, 

 the lower jaw included, the dentition as in Myoxocephalus. Isthmus 



