6, MONOPELTIS. 457 
of the snout. Lateral line distinct. Anal segments six. Three 
preeanal pores on each side. Colourless, head-shields yellowish or 
brownish. 
millim 
Length to vent .............. 250 
SBA ss sSaredeac scatn, 4 Gerace eee 32 
Diameter of body ............ 6 
Congo. 
a-e, Ad. & yg. Congo. 
5. Monopeltis galeata. 
Phractogonus galeatus, Hallow. Proc. Ac. Philad. 1852, p. 62, fig., 
and 1857, p. 50. 
Lepidosternon galeatum, Strauch, Mél. Biol. Ac. St. Petersb. xi. 
p. 465. 
Premaxillary teeth 2; maxillaries 4—4; mandibulars 5—6 (?). 
Nasals in contact ; two large shields covering the head, the anterior 
shorter, but broader, than the posterior ; a pair of small occipitals ; 
ocular rather large, eye not distinguishable; five upper labials; 
three lower labials, the posterior very large. Two hundred and 
fourteen annuli on the body and eighteen on the tail. No longitu- 
dinal sulci upon the body. Pectoral shields four, the two middle 
ones by their junction forming a triangle superiorly and preceded 
by two small equilateral shields. Six anal segments. One or two 
preanal pores on each side. Obscure white. 
Length to vent 466 millim.; tail 35 millim. 
Liberia. 
6. Monopeltis dumerilii. 
Phractogonus galeatus (non Hallow. ?), A. Dum. Rev. et Mag. Zool. 
(2) viti. p. 424, and Arch. Mus. x. p. 184. 
Lepidosternon dumerilii, Strauch, Mél. Biol. Ac. St. Petersd. xi. 
p. 467. 
Preemaxillary teeth 7; maxillaries 3—3 ; mandibulars 6—6(Dum.). 
Nasals entirely separated by the small rostral, which is longitudinally 
bisected ; a band-like narrow transverse shield between the two 
large shields of the head; three lower labials. Two hundred and 
twenty-four or two hundred and twenty-five annuli on the body, and 
twenty-one on the tail. Otherwise as in M. galeata. 
Gaboon. 
7. Monopeltis scalper. (Prats XXIV. fig. 4.) 
Phractogonus scalper, Giinth. Proc. Zool. Soc, 1876, p. 678, fig. 
Lepidosternon scalprum, Strauch, Mél. Biol. Ac. St. Petersb. xi. 
p. 469. 
Premaxillary tooth 1; maxillaries 3—3; mandibulars 6—6. 
Rostral small, trapezoid, separating widely the nasals ; two large 
