Neenchelys and Myro conger — Nelson 
563 
Caudal fin continuous with dorsal and anal; 
no pelvic fins; frontal usually paired 
suborder Anguilloidei 
a. Jaws not produced; gill arch skeleton in- 
cluding at least rudimentary basibranchials 
superfamily Anguilloidae 
(including families Heterenchelidae, An- 
guillidae, Moringuidae) 
b. Jaws not produced; gill arch skeleton with- 
out basibranchials .................... 
.............. superfamily Muraenoidae 
(including Xenocongridae, Dysomminidae, 
Myrocongridae, Muraenidae) 
c. Jaws produced; gill arch skeleton with or 
without basibranchials 
............ superfamily Nemichthyoidae 
(including Serrivomeridae, Nemichthyidae, 
Cyemidae) 
Observations on type specimens were made 
through the courtesy of Dr. P. H. Greenwood 
at the British Museum (Natural History) while 
I was on an nsf postdoctoral fellowship. 
REFERENCES 
Bohlke, J. E. I960. A New Ophichthid Eel of 
the Genus Pseudomyrophis from the Gulf 
of Mexico. Notulae Naturae 329, 8 pp., 2 
figs. 
Nelson, G. J. 1966^. Osteology and relation- 
ships of the eel, Neenchelys buitendijki. 
Copeia 1966(2) :321— 324, 2 figs. 
1966A Gill arches of teleostean fishes 
of the order Anguilliformes. Pacific Sci. 
20(4) :391-408, 58 figs. 
1967. Branchial muscles in repre- 
sentatives of five eel families. Pacific Sci. 
21(3): 348-363. 
Regan, C. T. 1912. The osteology and classi- 
fication of the teleostean fishes of the order 
Apodes. Ann. Mag. Nat. Hist., Ser. 8, 10: 
377-387, 2 figs. 
