21. CENXBONOTUS. 285 



fringed tentacles above the orbits, the posterior of which is about 

 three or four times the length of the anterior, and as long as the 

 head is high. Neck with many very small skinny flaps. Ventral 

 fins small ; the two anterior dorsal spines sometimes elongate, and 

 provided with skinny appendages at the top. Reddish-brown, with 

 several cross-bands on the back. 

 British and Scandinavian coasts. 



a. Adult. Polperro. Presented by J. Couch, Esq. 

 b-e, f, g, h. Adult. 



21. CENTRONOTUS*. 



Centi'onotus, £1. Schn. p. 165. 



Gunellus, sp., Ouv. Hee/ne Anim. ; Cuv. 4* Val. xi. p. 418. 



Gunellus, Kroyer, Naturhist. Tidskr. 1837, i. p. 376. 



Body elongate, covered with very small scales ; lateral line none ; 

 snout short ; very small teeth in the jaws, and sometimes on the 

 palate. Dorsal fiii long, formed by spines only. Yentrals none, or, 

 if present, rudimentary and jugular ; caudal distinct (except in 0. 

 roseus). Gill-openings of moderate width ; gill-membranes con- 

 nected with each other ; pseudobranchiae present ; branchiostegals 

 five ; air-bladder and pyloric appendages absent. 



Northern Seas, southwards to the coasts of France, New York, 

 California, and Japan. 



1. Centronotus gunellus. 



Gunellus comubiensium or Butter-fish, WUlughby, p. 115. cap. ix. 



tab. G. 8. fig. 3 ; Ray, p. 144 ; Petiver, Gazoph. tab. 51. fig. 4. 

 Blennius, sp., Artedi, Genera, p. 27. n. 5. 

 Tang-Brosme 3, Strom, Siindm. i. p. 315, and Norsk. Vid. Selsk. Skr. 



Nya Saml. i. p. 148. 

 Blennius guneUus, L. Syst. i. p. 443, and J^awn. Suec. p. 114. no. 318; 



Bl. Fische DeuiscM. ii. p. 186. taf. 71. fi^. 1 ; LacSp. ii. p. 503 ; 



Donov. Brit. Fishes, ii. pi. 27 ; Turton, Brtt. Faufia, p. 93 ; Jenyns, 



Man. p. 383 ; Miill. Prodr. Zool. Dan. p. 43 ; Faher, Fische Islands, 



p. 76 ; Richards. Faun. Bor. Amer. Fishes, p. 91 ; Retz. Faun. Suec. 



p. 324 ; (not Fabr.). 



* 1. Ophidiuni mucronatum, Mitch, in Lit. ^ Phil. Trans. New York, i. p. 361. 

 pi. 1. fig. 1. — Gunellus mucronatus, Cuv. ^ Val. xi. p. 427 ; Dekay, 

 New York Fauna, Fishes, p. 153. pi. 12. fig. 36.— New York.— This fish 

 appears to be extremely similar to C. gunellus. 



2. Blennius tonia, Pall. Zoogr. Rosso-Asiat. iii. p. 178. — Gunellus taenia, 



Cuv. 8f Val. xi. p. 439.— Kuriles. 



3. Pall. Zoogr. Rosso-Asiat. iii. p. 178. — Gunellus ruberrimus, Cuv. Sf Val. xi. 



p. 440. — Kiuiles. 



4. Blennius polyactocephalus, Pall. Zoogr. Rosso-Asiat. p. 179 — Gimellus 



polyactoceplialus, Cuv. rf" Val. xi. p. 448. — Kamtschatka. 



5. Gunellus crassispina, Schkg. Faun. Japan. Poiss. p. 139. — Japan. 



6. macrocephalus, Girard, Bost. Journ. 1850, vi. p. 263. — Massachusetts 



7. Clinus affinis, Reinh. Danske Vidensk. Selsk. Naturvid. og Mathem. Af 



handl. 1838, vii. pp. 114, 123. — Gunellus affinis, Kroyer, Naturhist. 

 Tidskr. i. 1837, p. 376.— Greenland. 



