114. BLENNID^E. 755 



TO. Dorsal fin of spines only. 

 n. Lateral lino none. 



o. Gill-niembraues free from the isthmus ; no pyloric coeca. 

 p. Anal spine none ; ventrals I, 3 ; top of head with 



tentacles CHIROLOPHUS, 410. 



pp. Anal fin with 2 small spines; ventral fins rudi- 

 mentary MUR.ENOIDES, 411. 



ppp. Anal fin with a large spine in a sheath; ventrals 



wanting APODICHTHYS, 412. 



oo. Gill-membranes joined to the isthmus; no ventral 

 fins; no anal spines; pyloric cceca. 



ANOPLARCHUS, 413. 



nn. Lateral lines several; pyloric cceca present; gill- 

 membranes free from isthmus; ventrals 

 none; anal spines small. 



XIPHISTER, 414. 



mm. Dorsal fin with its posterior half composed of soft rays ; 

 gill-membranes broadly united, free from 

 isthmus ; veutrals wanting ; lateral line 

 single, high; pyloric cceca present 



CEBEDICHTHYS, 415. 



II. Gill-openings prolonged forward below, separated by a nar- 

 row isthmus ; pectorals nearly as long as 

 head ; ventrals well developed. Ovipa- 

 rous, herbivorous. Arctic. (Stichccince.) 

 q. Lateral line present. 

 r. Lateral line forked or duplicated. 



EUMESOGRAMMUS. 416. 







rr. Lateral line simple, median. .. STICKS us, 417. 

 rrr. Lateral line simple, dorsal. 



NOTOGRAMMUS, 418. 

 qq. Lateral line obsolete. 



8. Teeth on vomer or palatines -LuMPENUS, 419. 



ss. Teeth on jaws only LEPTOBLENNIUS, 420. 



kk. Mouth nearly vertical; gill-membranes attached to the isth- 

 mus; scales small; lateral line obsolete; 

 no ventrals ; dorsal of spines only. ( Cnjp- 



tacanthodlncs) DELOLEPIS, 421. 



ff. Body naked; dorsal fins of spines only; ventrals obsolete. 



t. Gill-membranes joined to the isthmus; lat- 

 eral line obsolete ; pyloric cceca present ; 

 mouth nearly vertical; teeth strong, on 

 jaws, voiner, and palatines. 



CRYPTACANTHODES, 422. 



aa. Molar teeth strong, on vomer, palatines, and sides of lower jaw; dorsal of flex- 

 ible spines only; scales minute ; gill-mem- 

 branes joined to the isthmus; no ventral 

 fins; air-bladder present; no lateral line. 

 (Anarrhichadina:. ) 



u. Caudal fin distinct ; body moderately 

 elongate ANARRHICHAS, 423. 



uu. Caudal fin confluent with dorsal and 

 anal; body eel-shaped. 



ANARRHICHTHYS, 424. 



