172 TUIGLII)^. 



tical from the centre of the orbit. A curved prjEoperciilar process 

 provided with two spines directed upwards. Blackish-brown above ; 

 dorsal, caudal, and pectoral fins barred with black ; anterior dorsal 

 with a black spot posteriorly. 

 Pacific coast of the United States. 



a-c. Fine specimens. New Orcas Islands (Gulf of Georgia). Pre- 

 sented by the Lords of the Admiralty. — Girard describes the 

 upper maxillary as extending beyond the vertical from the pos- 

 terior margin of the orbit. (?) 



9. Centridermichthys bicornis. 



Cottus bicornis, Reinh. Vid. Selsk. Natur. og Math. Afh. viii. p. Ixxv. 

 B. 7. D. 8 I 15. A. 14. 

 Occiput with two acute points ; four proeopercular spines, the 

 uppermost of which is bifurcate. (Reinh.) 

 Greenland. 



10. Centridermichthys uncinatus. 



Cottus imcinatus, Reinh. Vid. Selsk. Natur. og Math. Afhandl. 1833- 



34, p. xliv (not Schleg.). 

 Icelus imcinatus, Kroyer, Naturhist. Tidssh: 1844, i. p. 253. 



D. 8 I 13. A. 11. 

 Occiput with two rounded tubercles. Two praeopercular spines, 

 the upper of which is bent upwards, hooklike, with a smaller process 

 at its base, (Reinh.) 

 Greenland. 



34. ICELUS. 

 Icelus, Kroyer, Nattirhist. Tidssh: 1844, i. p. 253. 



Head large, naked, armed at the opercles and on the neck ; body 

 subcompressed, with a dorsal series of bony plates from the neck to 

 the base of the caudal ; lateral line with osseous tubercles ; on the 

 sides and on the belly scattered scales. Two separate dorsals ; ven- 

 trals thoracic, wth less than five rays; no pectoral filaments. 

 ViUiform teeth in the jaws, on the vomer and the palatine bones. 

 Six branchiostegals. Air-bladder none. 



Coasts of Spitzbergen and Greenland. 



1. Icelus hamatus. 



Kroyer, I. c. 



D. 9 I 20. A. 16. V. 1/3. 

 The length of the head is one-third of the total ; the space between 

 the orbits very narrow, one-foiu'th of the chameter of the eye ; the 

 upper jaw longest. Prseoperculum with four spines, the upper three 

 of which are hooked, and the uppermost bifurcate. Pectoral fins 

 shorter than the head. Yellowish, with a great many brown spots. 

 (Kr.) 



Spitzbergen. 



