JAPANESE BLENNOID FISHES— JORDAN AND SNYDER. 443 



.S.S. Neozoarcinse: Scales present; body not 



greatly elongate, the dorsal of 28 to 42 



spines and 50 or more soft rays. 



/. Dorsal fin with about 40 spines and about 



50 soft rays; a short tentacle above the 



snout Neozoarces, 15. 



//. Dorsal fin with about 30 spines and about 

 75 soft rays; no tentacle above snout. 



Zoarchias, 16. 

 jj. Dictyosominse: Body covered with cross-wise tubes at right 

 angles with the lateral line, these forming an elaborate net- 

 work over the body; dorsal of spines only; gill-membranes 

 broadly united, free from the isthmus. Ventrals obsolete, 

 forming a scale-like apjjendage in the young, which disap- 

 pears with age Dictyosoma, 17. 



ii. Opisthocentrinie: Pectoral fins long and rather pointed, about as 

 long as head; dorsal high; gill-membranes broadly united, 

 free from the isthmus; no lateral line; no ventral fins; species 

 herbivorous. 



II. Dorsal with its posterior spines short, 

 rigid, and sharp, the anterior flex- 

 ible. 

 V. Head with small scales; dorsal with 

 hindmost spines only stiff. 



Opisthocentnis, 18. 

 vr. Head naked; dorsal with spines becom- 

 ing strong near the middle, and hind- 

 most ones heavy Abryois, 19. 



till. Dorsal spines all flexible; head naked. 

 Pholidapus, 20. 

 hh. Slichxinse: Gill-membranes continued forward below, the mem- 

 branes nearly separate and free from the isthmus; 

 dorsal of slender i)ungent species only; species her- 

 bivorous. 



V. Lateral line present, single, double 

 or triple; body moderately elon- 

 gate. 

 X. Lateral lines three or more on 

 each side. 

 y. Lateral lines all three com- 

 plete, each with lateral 

 branches. 

 z. Lateral lines each with 

 numerous short branches, 

 each ending in a pore. 



Ernogra m ??n(.s-, 2 1 . 

 zz. Lateral lines each sending 

 out branches at right 

 angles which connect with 

 the other lateral lines, 

 thus covering the whole 

 body with a network of 

 lines Ozorthe, 22. 



