776 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



418.— rVOTOGRAMMUS Bean. 



(Beau, Pioc. U. S. Nat. Mus. iv, 147, 1881: type Sfichmis rofhrocki Bean.) 



This geuus differs from SUch(eus in the presence of a single lateral 

 line along the base of the dorsal fin. It is known, however, from im- 

 mature examples only. The caudal fiu is emargiiiate, a character 

 unusual in this family, (vai-o-, back; ypa/j.fj.7j, line.) 



11§5. N. rothroclti Bean. 



Pale brown, with 3 series of paler spots, those of the median series 

 usually longer and narrower than the others; a series of about 10 pale 

 spots on median line of back, the anterior as large as eye; a dark 

 stripe around snout to end of opercle; a very narrow dark stripe 

 along base of dorsal, its lower margin seeming to mark the course of 

 the superior lateral line. Body covered with minute scales; lateral 

 line undeveloped (in the immature specimens known), apj^arently run- 

 ning close to outline of back. Teeth in the jaws, and apparently on 

 vomer and palatines. Gill-membrane deeply cleft, free from the isth- 

 mus. Eye 4 in head, as long as the subconical snout; maxillary 

 reaching front of pupil. Dorsal beginning above upper axil of pec- 

 toral; like the anal, connected by a low membrane with the caudal; 

 caudal emarginate behind; ventrals short, close together, 3 in head, 

 and not half as long as pectorals; longest dorsal spines half height of 

 body. Head 4^; depth G. B. G. D. XLYIII; A. I, 34; V. I, 4; P. 15; 

 C. 21. Northern Alaska and Siberia. 



{SUchwusI rothrocU Bean, Proc. U. S. Nat. Mus iv, 146, 1881,) 



419.— I.UMPENUS Reiuhardt. 

 {LeptoffimneUus Ayres: Lcptoclinas and Anisarchus Gill.) 

 (Reinhardt, Dansk. Vidensk. etc. 1837, 110: type Blennius Imnpenus Fabr..) 



Body greatly elongate, moderately compressed, covered with small 

 scales; lateral line indistinct or obsolete. Headlong; snout short; no 

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

 rather small, conical teeth on each jaw; teeth present on vomer or i^al- 

 atiues; gill-openings prolonged forward below, very narrowly 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 half length of head; 

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

 loric cosca present; no air-bladder. Chiefly herbivorous. Northern 

 seas. {Lumpen, a Danish name of some similar fish.) 



