6. M0N0PELTI8. 457 



of the snout. Lateral line distinct. Anal segments six. Three 

 proeanal pores on each side. Colourless, head-shields yellowish or 

 brownish. 



millim. 



Length to vent 250 



Tail 32 



Diameter of body 6 



Congo. 



a-e. Ad. & yg. Congo. 



5. Monopeltis galeata. 



Phractogonus galeatus, Jlalloiv. Proc. Ac. Philad. 1852, p. C2, fig., 



and 1857, p. 50. 

 Lepidosternon galeatmu, Sfrauch, McI. Biol. Ac. St. Peteish. xi. 



p. 465. 



Priemaxillary teeth 2 ; maxillaries 4 — 4 ; mandibulars 5 — 5 (?). 

 Kasals 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. IS'o 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 

 prseanal pores on each side. Obscure white. 



Length to vent 406 millim. ; tail 35 millim. 



Liberia. 



G. Monopeltis dunierilii. 



Phractogonus galeatus (non. Halloiv. ?), A. Bum. Rev. et Mag. Zool. 



(2) viii. p. 424, and Arch. Mm. x. p. 184. 

 Lepidosternon dumerilii, Strauch, Mel. Biol. Ac. St. Petcrsh. xi. 



p. 407. 



Prsemaxillary teeth 7; maxillaries 3 — 3; mandibulars — ^{Diim.). 

 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 

 twentj'-one on the tail. Otherwise as in M. galeata. 



Gaboon. 



7. Monopeltis scalper. (Plate XXIV. fig. 4.) 



Phractogonus scalper, Giinth. Pi-oc. Zool. Sac. 1876, p. 678, fig. 

 Lepidosternon scalprum, Strauch, Mel. Biol. Ac. St. Petersb. xi. 

 p. 401). 



Pracmaxillary tooth 1; maxillaries 3—3 ; mandibulars 6 — 0. 

 Rostral small, trapezoid, separating widely the nasals ; two large 



