6. MONOPELTIS. 455 
1. Monopeltis capensis. (Pratm XXIV. fig. 1.) 
Monotrophis capensis, Gray, Cat. Sh. Rept. ii. p. 41. 
Monopeltis capensis, Smith, Ill. 8. Afr., Rept. pl. lxvii. 
Monotrophis capensis, Gray, Proc. Zool. Soc. 1865, p. 454. 
Lepidosternon capense, Strauch, Mél. Biol. Ac. St. Petersb. xi. p. 462. 
Premaxillary tooth 1; maxillaries 3—3 ; mandibulars 7—7. Rostral 
quadrangular, twice as broad as high, separating the nasals; a single 
plate covering the head, bordered posteriorly by a pair of small band- 
like occipitals ; ocular minute, eye not distinct ; three upper labials, 
third large; mental small, followed by three or four chin-shields; three 
lower labials, first two small, third very large. Two hundred and 
four or two hundred and twelve annuli on the body and ten or twelve 
on the tail; an annulus on the middle of the body includes forty-two to 
forty-eight segments, twenty-four to twenty-eight dorsals and eighteen 
or twenty ventrals ; the dorsal segments are very narrow; the ven- 
trals much larger, the two median series but very slightly broader 
than long, except quite anteriorly. Pectoral shields six, large, 
very elongate, the median pair as long as the distance between the 
posterior edge of the occipitals and the tip of the snout. Lateral 
line distinct. Anal segments four, median pair largest. A preanal 
pore on each side. Rose during life, head-shield yellow. 
millim 
Length to vent .............. 220 
Tail. esac ecg saes culos V4 wees 13 
Diameter of body ............ 7 
South Africa. 
a-b. Ad. 24° lat. 8. Sir A. Smith [P.]. (Types.) 
2. Monopeltis sphenorhynchus. 
Monopeltis sphenorhynchus, Peters, Mon. Berl. Ac. 1879, p. 275, and 
Reise n. Mossamb. iii. p. 87, pl. xiii. a. figs. 1-3. 
Lepidosternon sphenorhynchum, Strauch, Mél. Biol. Ac. St. Petersb. 
xi. p. 465. 
Well distinguished from the preceding in the following points :— 
Maxillary teeth two on each side. Two lower labials, first small, 
second very large. The segments of the annuli larger, thirty-two 
or thirty-four, of which eighteen or twenty are on the dorsal and 
fourteen on the ventral side; the two median ventral segments 
throughout the length of the body, much broader than long. 
millim 
Length to vent .............. 245 
Parl sg oactegpovetdeaen suse a We aay 13 
Diameter of body ........... 8 
South-East Africa. 
Ad, (Ann. 204+12). Zambezi. Sir J. Kirk [P.]. 
b. Ad. (A, 198-411). Shire Valley, Zambezi. 
