2378 Bulletin 4.7, United States National Museum. 



premaxillaries not protractile; gill openings wide, extending forward 

 below, the membranes free from the isthnms, or at least forming a broad 

 fold across it. Dorsal fin entire, or more or less emarginate, the spines 

 slender; pectorals moderate; veutrals well developed, I, 3; no pyloric 

 caeca; lateral line developed anteriorly. Species numerous, lurkiug under 

 rocks and algse in most warm seas; some species in the lakes of northern 

 Italy. The European species in general are larger in size than ours, with 

 higher fins. (Blennius, the ancient name, from fiXsvva, slime.) 



LIPOPHBYS (Xeirrw, to disappear ; 6<J>pvs, eye-brow) : 

 a. Supraorbital cirrus wanting; snout not very blunt in profile. 



b. Posterior canine present in each jaw ; dorsal slightly emarginate; D. XII, 18. 



CAROLLNUS, 2724. 

 BLENNIUS : 



aa. Supraorbital cirrus present ; profile of snout more or less blunt. 

 c. Canines strong, present in both jaws; no nuchal cirri. 

 d. Dorsal rays XI or XII, 17 or 18. 



e. Supraorbital cirrus bifid ; dorsal free from caudal. 



/. Supraorbital cirrus as long aa head; dorsal emarginate: sides 

 spotted ; D. XI, 17. i< UCOKUM, 2725. 



ff. Supraorbital cirrus as long as eye and snout ; dorsal continuous ; 

 color olivaceous, with dark bars ; D. XI, 18. 



STEARNSI. 2726. 



ee. Supraorbital cirrus bifid, nearly as long as head ; last ray of dorsal 

 joined to caudal; sides with a network of blue lines; D. XII. 18. 



FAVOSUS, 2727. 



dd. Dorsal rays XII, 21 or 22; Supraorbital cirrus long, fringed; dorsal free 

 from caudal; cheeks with network of lines; body nearly plain. 



PILICORXIS, 2728. 

 cc. Canines short and stoutish, present in lower jaw only (undescribed in truncatus 



and in mar-mom**.) 

 g. Nape without cirrus ; snout abruptly decurved; body robust, marbled ; D. 



XII, 20. MARMOREUS, 2729. 



gg. Nape with a cirrus on each side.' 



h. Dorsal and anal free from caudal. Nape with a filiform bifid tentacle 

 on each side ; teeth undescribed ; Supraorbital tentacle simple ; 

 color olive, with bright spots. 



TRCNCATUS, 2730. 



hh. Dorsal and anal with the last ray largely joined by membrane to 



caudal; nape with a small cirrus; posterior canines strong, 



in lower jaw only; dorsal not notched; color uniform brown; 



D. XII, 13. viNCTUS,2731. 



ggg. Nape with a comb of many close-set cirri on a fleshy crest; lower 



jaw only with short posterior canines; dorsal fin continuous, free 



from caudal ; D. XII, 16 or 17. CRIST ATUS, 2732. 



Subgenus LIPOPHRYS, Gill. 

 2724. BLENNIUS CAROLINUS (Cuvier & Valenciennes) . 



D. XII, 18; A. 17. Body rather long and slender, more elongate than in 

 the European species, Blennius pholis, more compressed, the head longer ; 

 maxillary extending to opposite middle of eye; teeth }$, with strong 

 canines on both jaws; gill membranes free from isthmus; no trace of 

 tentacles above eye; dorsal spines slender, a little lower than the soft 



