BLENNIIDJ^. 207 



Jaws with a series of numerous small moveable teeth, 



implanted in the gum 6. Salarias, p. 239. 



Each jaw with four hook-like teeth near the symphysis... 7. Blennophis, p. 259. 



The maxillary extending beyond the gill-opening 8. Neoclinus, p. 259. 



Ventrals none 9. Cebidichtiiys, p. 2G0. 



b. Dorsal fin or fins chiefly composed of spines, with a few posterior rays. 



A single dorsal fin ; ventral fins. Jaws with a series of 



small teeth ; palate smooth 10. My.xodes, p. 2G0. 



A single dorsal fin. Teeth in the jaws, on the vomer and 



the palatine bones. Snout elongate, depressed 11. Heterostichus, p. 201. 



A single dorsal fin. Jaws and palate with a narrow band 



or a single series of small teeth. Snout rather short. 12. Clinus, p. 261. 



Dorsal fin anteriorly with a detached three-spined por- 

 tion 13. Cristiceps, p. 272. 



Three dorsal fins, the two anterior of which are spinous... 15. Tripterygium, p. 270. 

 Ventrals none 17. Dictyosoma, p. 27&. 



c. Dorsal fin formed by spines only. 



Two dorsal fins 14. Auchenopterus, p. 275. 



Ventral fins. Scales large 16. Dactyloscopus, p. 279. 



Ventral fins scarcely before the pectorals. Lower jaw 



with a short skinny appendage 18. Gunelliciitiiys, p. 280. 



Ventral fins distinctly jugular ; gill-membranes only 



shghtly united at the throat 19. Sticii;eus, p. 280. 



Ventral fins composed of several rays, distinctly jugular. 

 Scales small ; lateral line none. Anal spine none. 

 Gill-membranes miited below the throat 20. Blenniops, p. 284. 



Ventral fins none or rudimentary. Scales small ; lateral 

 line none. Anal spine none. Gill-membranes united 

 below the throat 21. Centronotus, p. 285. 



A large excavated spine before the anal fin 22. ApoDicnTny s, p. 290. 



Ventral fins none; body naked or with rudimentary 



scales; several lateral lines 23. Xipiiidion, p. 291. 



Ventral fins none ; muciferous channels of the head well 



developed; anterior dorsal spines feeble 24. Cryptacantiiodes, p. 291. 



Ventral fins none ; anterior dorsal spines very strong . . . 25. PaTjECus, p. 292. 



Ventral fins scarcely before the pectorals ; body naked... 26. Pholidiciithys, p. 293. 



d. No distinct spines in the vertical fins. 



Upper lip with a lateral flap 27. Andamia, p. 294. 



Ventral fins below the eyes 28. Genypterus, p. 294. 



3. Molar teeth none. Caudal fin none. 



Dorsal fin with a short depressed part on the tail, which 



is formed by spines 29. Zoarces, p. 295. 



Ventral fins none 30. Nemophis, p. 296. 



B. Ventrals thoracic. 

 Two dorsal fins 31. Pseudoblennius, p. 297. 



