Jordan and Ever maun. — Fishes of Norih America. 2435 



imen here described from Uualaska. (Named for Dr. J. T. Rothrock, 

 professor of botauy, University of Pennsylvania.) 



Poroclinus rotlirocki, Bean, Proc. U. S. Nat. Mus. 1890, 40, 55° 15' N., 159° 37' W., between 

 Nagai Island and Koniushi Islands. (Coll. Albatross.) 



918. LUMPENUS, Reinliardt. 



(Snake Blennie.s.) 



Lumpenus, Keinhakdt, Dan.sk. Videnak. Selsk. Natur., vi, 1837, llOl(lumpenus—fahricii). 

 Leptogunnellus, Ayres, Proc. Cal. Ac. Nat. Sci., i, 1854, 26 {(jraciUs). 

 Centroblennius, Gill, Proc. Ac. Nat. Sci. Phila. 1864, 209 (nubilus). 

 Leptoblennhis, Gill, Proc. Ac. Nat. Sci. Phila. 1864, 209 (serpientinus) . 

 Anisarchus, Gill, Proc. Ac. Nat. Sci. Phila. 1864, 209 (mecKus) . 



Body greatly elongate, moderately compressed, covered with small 

 scales; lateral line indistinct or obsolete. Head long; snout short; no 

 cirri; eyes large, placed high; month moderate, with a single row of 

 rather small conical teeth on each jaw; palatine teeth present or absent; 

 gill openings prolonged forward below, very narrowlj^ united anteriorly 

 to the isthmus, not forming a free fold across it. Dorsal composed of 

 numerous, sharp, flexible, rather high, spines; caudal fin long; anal many- 

 rayed; pectorals large, more than I length of head, the middle rays long- 

 est; ventrals well developed, jugular, I, 3 or I, 4; intestinal canal long; 

 pyloric cteca present; no air Idadder. Chiefly herbivorous. Northern 

 seas. {Lumpen, a Danish name of Zoarces ciri2)ariis, with which these 

 fishes were at first confounded.) 



Anisarchus {avLcroq, nnequal; apxo^, for anal): 

 a. Anal fin very low in front, the rays gradually lengthened; dor.sal spines 61; anal 

 rays 42. ' ' ' Medius, 2790. 



aa. Anal fin not much lower in front than behind. 

 LUMPENl'S : 

 6. Teeth on palatines more or less developed, at least in the adult; anal rays 40 

 to 46; dorsal spines 63 to 71. 

 e. Dorsal spines 69 to 71. 



d. Anal rays 46; dorsal separate from caudal. anguillaris, 2791. 



del. Anal rays 41; dorsal slightly joined to caudal. mackayi, 2792. 



cc. Dorsal .opines about 63 ; anal rays 43. fabricu, 2793. 



Leptoblennius (AfTTTo?, slender; Blennius). 

 bb. Teeth on palatines wanting; dorsal apines 72 to 75; anal rays about 50. 



LAMPETR.'EFORMIIS, 2794. 



Subgenus ANISARCHUS, (iill. 

 2790. LUMPENUS MEDIUS (Ueinhardt). 



Head 6; depth 10. 1). LXI; A. 42; V.I, ,S. Lower jaw scarcely included, 

 the maxillary reaching front of eye; teeth on pnlatiues, none on vomer; 

 ventrals slender, i length of head; lower rays of pectoral shorter than 

 middle ones, the fin shorter than head. Dorsal and anal slightly joined 

 to the truncate caudal; anterior half of anal with the rays shortened. 

 (Collett.) Yellowish, nearly plain. Greenland to Norway and Spitz- 

 bergen and westward to Bering Sea and Kamchatka. Specimens from the 



