6. MONorELTis. 455 



1. Monopeltis capensis. (Plate XXIV. fig. 1.) 



Monotrophis cupensis, Gray, Cat. Sh. Rept. ii. p. 41. 

 Monopeltis capeusis, Smith, III. <S'. Afr., llept. pi. Ixvii. 

 Monotropliis capensis, Gray, Proc. Zool. S'oc. 1865, p. 454. 

 Lopidosternon capeiise, Strauch, Mel. Biol. Ac. St. Petersh. xi.p. 462. 



PiTcmaxillaiy 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 largo; mental small, followed by three or four chiii-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 anuulus 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 pneanal 

 pore on each side. Eose during life, head-shield yellow. 



millini. 



Length to vent 220 



Tail 13 



Diameter of body 7 



South Africa. 

 a-b. Ad. 24<^ lat. S. Sir A. Smith [P.]. (Types.) 



2. Monopeltis sphenorhynchus. 



Monopeltis sphenorhynclius, Peters, Mo)i. Berl. Ac. 1879, p. 275, and 



lieise n. 3Iossa)nb. iii. p. 87, pi. xiii. a. figs. 1-3. 

 Lepidosteruou sphenorhynchum, Strauch, Mel. Biol. Ac. St. Petersh. 



xi. p. 405. 



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 



Tail 13 



Diameter of body 8 



South-East Africa. 



a. Ad. (Ami. 204 + 12). Zambezi. Sir J. Kirk [P.]. 



b. Ad. (A. 108-1-11). Shire Valley, Zambezi. 



