464 AMPHISB^NID^. 



Lateral line inueh stronger than the vertebral and ventral. Light 

 yellowish-brown, the segments each with a darker spot. 



millim. 



Length to vent 384 



Tail 26 



Bahia. 



5. Lepidostenion rostratum. 



Lepidosternon rostratum, Strauch, Mel. Biol. Ac. St. Petersh. xi. 

 p. 433. 



Differs from L. infraorhitale by the much more pointed, prominent, 

 and strongly depressed snout, the horizontal edge of which is almost 

 sharp, and by the absence of infraocular. Two hundred and forty 

 to two hundred and forty-five aunuli on the body, and fourteen to 

 sixteen on the tail. The spots on the dorsal segments very indis- 

 tinct. 



Length to vent, 585 millim. ; tail 35 millim. 



Bahia. 



6. Lepidosternon petersii. 

 Lepidosternon petersii, Strauch, Mel. Biol. Ac. St. Petersb. xi. p. 438. 



Snout rather pointed, not turned upwards ; rostral followed by a 

 pair of short but very broad prsefrontals ; behind the latter, a hex- 

 agonal frontal, broader than long, followed by two pentagonal 

 parietals which are but little smaller than the frontal ; a pair of 

 small occipitals ; a rather small supraocular ; eye not distinguishable ; 

 three temporals, upper largest ; two upper labials, anterior very 

 large ; mental short and broad, followed by a median large chin- 

 shield ; a small lateral chin-shield on each side ; three lower labials, 

 first very small, second large. Two hundred and nine annuli on the 

 body and sixteen on the tail. Pectoral shields numerous, small, 

 polygonal, with three median ])airs (on a transverse line) strongly 

 dilated longitudinally. Six anal shields. Lateral line very distinct, 

 vertebral and ventral lines less so. Light brown above. 



Brazil. 



7. Lepidosternon polystegum. 



Lepidosternon grayii, Gray, Cat. Sh. Pept. ii. p. 40. 

 epidosternon polyste^-um, A. Dum. Cat. Meth. Pept. p. 149 ; Peters, 



Mon. Berl. Ac. 1879, p. 277, pi. — . fig. 3 ; Strauch, Mel. Biol. Ac. 



St. Petersh. xi. p. 441. 

 — grayii {Smith}, Gray, Proc. Zool. Soc. 1865, p. 452, fig. 



Prsemaxillary tooth 1 ; maxillaries 2 — 2 ; mandibulars 5—5. 

 Snout depressed, prominent, turned upwards, broadly rounded, with 

 angular horizontal edge ; rostral large, widely separated from the 

 ocular, with a pair of short grooves posteriorly ; it is separated from 

 the frontal by a pair of narrow, band-like, transverse prasfroutals ; 

 frontal small, hexagonal, with very open anterior angle and acute 



