376 OPHIDIID^. 



of two rays, and inserted in front of the pectoral. Jaws with a band 

 of minute, and with an outer series of strong pointed teeth ; a small 

 patch of teeth on the vomer. Jaws equal anteriorly ? Barbel none. 

 Eight branchiostegals. Gill- apparatus ? An air-bladder. Pyloric 

 appendages two. 

 Mediterranean. 



1. Pteridium atrum. 



Oligopus ater, Risso, I. c. p. 142. pi. 11. fig. 41. 



niger, Hisso, Eur. Merid. ill. p. 338. 



Gadopsis ater, Filippi in Sieb. <^ KoUiker, Zeitschr, Wiss. Zool. 1855, 



p. 170 (air-bladder). 

 Pteridium atrum, Fuii)jn ^ Veramj, Sopra alcuni Pesd nota, in Mem. 



Accad. Sc. Torin. 2 ser. xviii. sep. cop. p. 11. fig. G (ab-bladder). 



D. 64. C. 14. A. 44. (Bisso.) 

 Dark brown. 

 Mediterranean. 



Ajypendix. 



8. BKOTULOPHIS. 

 Brotulophis, Kaup in Wiegm. Arch. 1858, p. 93. 



Tail tapering. Vertical fins united ; ventral fins reduced to single 

 filaments, opposite the pectoral. Teeth smaU, pointed, of unequal size ; 

 none on the vomer. 



Island of Soolo. 



1. Brotulophis argentistriatus. 



Kaup, I. c. 



The length of the head is one-sixth of the total, and rather more 

 than twice the length of the pectoral. The distance of the vent from 

 the mandible is twice the length of the head. Black, with a silvery 

 band from the eye to the end of the tail. Lower parts silvery ; axil 

 of the pectoral black. 



The typical specimen is 108""" long. 



Second Group. OPHIBIINA. 



Ventral fins replaced by a pair of bifid filaments (barbels) inserted 

 below the glossohyal. 



9. OPHIDIUM*. 



Ophidium, pt., Artedi, Gen. p. 19. 

 Ophidium, Cuv. JRkgne Anitn. 



Body elongate, compressed, covered with verj- ^mall scales. Eye 



* 1. Ophidiiun taylori, Girard in U. S. Pacif. R. B. Exped. Fishes, p. 138.— 

 Monterey, California. 



2. - — joseplii, Girard in Proc. Acad. Naf. Sc. Phi/ad. 1858, p. 170.— St. 



Joseph's Island, Texas. 



3. graellsi, Poe//, Mem. Cub. ii. 18GI, p 425. — Cuba. 



