123. DASYPELTIS. 353 
ANOPLOPHALLUS. 
Megalops (non Lacép.), Hallow. Proc. Ac. Philad, 1860, p. 488. 
Anoplophallus, Cope, dm. Nat. 1893, p, 480. 
‘*Mandibular teeth increasing in length posteriorly, recurved, 
nearly straight ; two internasals, much smaller than the preefrontals ; 
frontal a little longer than broad, pentangular; a frenal [loreal] ; 
two antoculars ; two postoculars; eye resting on the fourth supra- 
labial; pupil ovoid; eyes very prominent; body slender, much 
compressed ; abdomen angular ; tail rather short.” (Hallowell). “A 
long loreal and no preocular plate.” ( Cope.) 
A. MACULATUS. 
Megalops maculatus, Hallow. 1. ¢. 
“21 rows of smooth scales; body presenting numerous sub- 
quadrangular and oblique blotches above, of a brown colour; inter- 
mediate spaces white with a tinge of yellow; under surface white. 
Abdominal scuta 170; a bifid praeanal ; 61 subcaudal scutelle.” 
Total length 375 millim. ; tail 95, 
Tahiti. 
Subfam. 3. RHACHIODONTIN. 
Leptognathiens, part., Duméril, Mém. Ac, Sc. xxiii. p. 464, 1853 ; 
Duméril § Bibron, Erp, Gén. vii. p. 25, 1854. 
Rachiodontide, Giinther, Cat. Col. Sn, p. 141, 1858. 
Rachiodontidee, Jan, Elenco sist. Ofid. p. 106, 1863. 
Dasypeltine, part., Cupe, Proc. Am. Philos. Soc, xxiii. 1886, p. 494. 
Only a few teeth, on the posterior part of the maxillary and 
dentary bones and on the palatines. Some of the anterior thoracic 
vertebrae with the hypapophysis much developed, directed forwards, 
and capped with enamel. 
A single genus. 
123. DASYPELTIS. 
Anodon (non Lam.), Smith, Zool. Journziv. 1829, p. 443. 
Dasypeltis, Wagler, Syst. Amph. p. 178 (1830) ; Giinth. Cat. Col Sn. 
p. 141 (1858). 
Rachiodon, Jourdan, Le Temps, 13. 6. 1833 (?); Dum. § Bibr. Erp. 
Gén. vii. p. 487 (1854) ; Jun, Elenco sist. Ofid. p. 106 (1863). 
Tropidonotus, part., Schleg. Phys. Serp. ii. p. 297 (1837). 
Deirodon, Owen, Odontogr. p. 220 (1845). 
Teeth very small, few, 3 to 7 in each maxillary, and as many in 
the mandible ; palatine but no pterygoid teeth. Head small, not 
or scarcely distinct from neck; no mental groove; eye moderate, 
with vertically elliptic pupil; nostril in a semidivided nasal, which 
is in contact with the preocular; no loreal. Body cylindrical or 
slightly compressed, elongate; scales strongly keeled, with apical 
VOL. Il. 2A 
