766 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



Butter-fishes. 



(Centronotus Bloch: GunncUus Cuvier.) 



(Lacdpede, Hist. Nat. Poiss. ii, 324, 1800: type Murasnoides sujef Lacdp. = Blennius 

 g unn ell us L.) 



Body long and low, considerably compressed, somewhat baud-shaped, 

 the tail slowly tapering; head small, compressed, naked or scaly; 

 mouth rather small, oblique; jaws with rather small teeth in narrow 

 bands or single series; vomer and palatines usually toothless; gill- 

 membranes broadly united, free from the isthmus; scales very small, 



* Little known species related to Muranoides, recorded from Kamtschatka, and 

 doubtless occurring also in Alaska, are the following: 



M. tcenia (Pallas). 



Body banded; teeth obtuse, subdistinct; head subtriangular, compressed; body 

 ensiform, covered with minute imbedded scales; vent median. Dorsal fin extending 

 from near the head to the tail, the spines subequal; caudal subdistinct; pectorals 

 small; ventrals represented by 2 recurved spines. D. LXXXVII; A. 47. Kurile 

 Islands. (Pallas.) 



(Blennius tccnla Pallas, Zoogr. Ross.-Asiat. iii, 178.) 



M. rubcrrimus (Cuv. & Val.) 



Bright red. Form of preceding; scales inconspicuous; ventrals each a single 

 scarcely projecting spine ; caudal broad, rounded, distinct. D. CXV. Kurile 

 Islands. (Pallas.) 



(GunncUus ruberrimus Cuv. & Val. xiv, 440, after Pallas, 1. c. 178.) 



M. ? ocellatus (Tilesius.) 



Brownish, marked with yellow and purple; six black ocellated spots, along the 

 dorsal h' n. Caudal distinct; ventrals none. D. LXXX; A. 50. Otherwise essentially 

 as in M. yiinncllua. Kamtschatka. (Cuv. $ /'/.) 



(OphiiHiint iK'dlatum Tiles. Mdm. Acad. St. Petersb. ii, 237, 1811: Gunnrllus apos Cuv. 

 & Val. xiv, 426: Centronotus apus Gthr. iii, 288.) 



GUNNELLOPS Bleeker. 



(Bleeker: type Blcnnlu* roseua Pallas.) 



Apparently distinguished from Murccnoidea by the tapering tail, around which the 

 vertical fins are confluent; palatine teeth present. 



(Gunin-tlitx, (tunnel, an old name of Muranoidcs gunnellua; uif>, eye.) 



G. roncus (Pallas) Bleeker. 



Intensely red. Head nhtnse, the lower jaw projecting; eyes large; body very 

 long, compressed, tapering into a slender tail; pectorals small, ovate, hyaline; 2 

 Bpines in place of venirals; dorsal extending from the nape to the end of the tail; 

 anal joined to caudal. D. ca. 100; A. ca. 90; P. 9; V. I. Knrile Islands. 



(Ulenniua roaeus Pallas, 1. c. 177: Ccntronotus roecue Gunther, iii, 290.) 



