460 



AMPHISB^NIBJE. 



Pectoral segments enlarged. A gular fold ; a vertebral line. No 

 praeanal pores. Tail rounded, depressed, above with regular trans- 

 verse rows of round tubercles separated by granules. 

 Florida. 



1. Rhineura floridana. 



Lepidosternon fioridanum, Baird, Proc. Ac. Philad. 1858, p. 255 ; 



Strauch, Mel. Biol. Ac. St. Petersh. xi. p. 460. 

 Rhineura floridana, Co^ye, Proc. Ac. Philad. 1861, p. 75 ; Bocourt, 



Miss. Sc. Mex., Rept. p. 491, pi. xxix. i. fig. 1. 



Rostral small, hexagonal, separating the nasals which rest on the 

 first and second labials ; a broad plate forming the edge of the 

 snout ; behind the latter a praefrontal, a larger frontal, and a pair of 

 occij^itals ; ocular small, the eye not visible ; a large prseocular, a 

 small infraocular, and a small and a large loreal ; four upper labials, 

 fourth very large ; mental small, pentagonal, narrowed anteriorly ; 

 four chin-shields on a row ; iive lower labials. Two hundred and 

 forty-four annuli on the body and eighteen on the tail (246 — 250 -f- 

 17 — 18, Strauch) ; an annulus in the middle of the body consists of 

 twenty-eight segments ; dorsal segments much longer than broad ; 

 the two median ventrals broader than long. A vertebral line, no 

 lateral line. Pectoral shields not much enlarged, forming four 

 transverse series. Eight anal segments, median pair largest. The 

 tubercles on the tail in thirteen transverse series. Colourless. 



millim. 



Length to vent 265 



Tail 17 



Diameter of body 6*5 



Florida. 

 a. Ad. Florida. E. D. Cope, Esq. [E.]. 



8. LEPIDOSTERNON.* 



Leposternon, JVagler, in Spix, Spec. Nov. Serp. Bras. p. 70. 

 Lepidosternon, Wagl. Syst. Amph. p. 197 ; Dum. ^- Bibr. v, p. 503 ; 



Gray, Cat. Tort. 1844, p. 78, and Proc. Zool. Soc. 1865, p. 451. 

 Cepliaiopeltis, Miiller, in Teidem. u. Trevir. Zeitschr. f. Physiol, iv. 



1831, p. 257 ; Gray, Cat. Tort. p. 73, and Proc. Zool. Soc. 1865, 



p. 463. 



Nostril inferior, pierced in the rostral. Head depressed, with 

 projecting snout. Pectoral segments enlarged. A strong gular fold. 

 Tail cylindrical, obtuse. No praeanal pores. 



South America. 



* For the mode of counting the annuli, see footnote under Monopeltis, p. 4.53. 



