21. CENTRONOTUS. 285 



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

 thi-ee or four times the length of the anterior, and as long as the 

 head Ls high. Neck with many veiy small skinny flaps. Ventral 

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

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

 several cross-bands on the back. 

 British and Scandinavian coasts. 



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

 b-e, f, (/, h. Adult. 



21. CENTRONOTUS*. 



Centi'onotiis, BL Scfin. p. 165. 



Gunellus, sp., C'liv. Regne Anim. ; Cm: Sf Vol. xi. p. 418. 



Gmielhis, 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 fin long, formed by spines only. Ventrals none, or, 

 if present, nidimentary and jugular ; caudal distinct (except in C 

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

 nected with each other ; pseudobranchiae present ; branehiostegals 

 five ; aii'-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, Willughhy, p. 115. cap. ix. 



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

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

 Tang-Brosme 3, Strom, Sondin. i. p. 315, and Norsk. Vid. Sekk. Skr. 



Nya Saml. i. p. 148. 

 Blennius gunellus, L. Si/st. i. p. 443, and Faun. Siiec. p. 114. no. 318 ; 



£1. Fische Deutschl. 'ii. p. 186. taf. 71. fig. 1 ; Lacep. ii. p. 503; 



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



Man, p. 383 ; Midi. Prodr. Zool. Dan. p. 4^3 ; Faber, Fische Islands, 



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



p. 324 ; (not Fabr.). 



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

 pi. 1. fig. 1. — Gunellus mucronatus, Cuv. cf- Val. xi. p. 427 ; Bekay, 

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

 appears to be extremely similar to C. gunellus. 



2. Blennius tania, Pall. Zoogr. Eosso-Asiat. iii. p. 178. — Grunellus taenia, 



Cuv. S( Val. xi. p. 439.— Kiiriles. 



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



p. 440. — Kuriles. 



4. Blennius polyactocephalus, Pall. Zoogr. Eosso-Asiat. p. 179 — Gunellus 



polyactocephalus, Cuv. d' Val. xi. p. 448. — Kamtschatka. 



5. Gunellus crassispina, Schleg. Faun. Jajpon. Poiss. p. 139. — Japan. 



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



7. Clinus afHnis, Eeinh. Danske Videtisk. Sclsk. Naturvid. og Mathem. Af- 



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

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



