10 REPTILES. 



loreal ; seven upper labials ; one anterior, two posterior oculars ; 

 155 abdominal, one entire anal, 33 bifid caudal plates. Tail 

 short, thick, ending in an acute spine. Head and neck dark 

 brown or black ; vertical and occipitals dirty white ; body and 

 tail brownish grey, each scale darker-edged. Back with two 

 longitudinal series of about fifty dark brown small spots ; abdo- 

 men uniform yellowish. Breadth of head I"; length of head 

 I"; total length 13"; length of tail If". 



5. Rhinosimus, Dum. 8f Bibr. 



Body rounded, moderate ; tail moderate ; head short, rather 

 distinct from body ; rostral shield pyramidal, prominent, sharp 

 above, recurved; scales smooth, in nineteen rows; anal and 

 subcaudals entire ; two pairs of frontals, two anterior and two 

 posterior oculars. Posterior maxillary teeth longest, grooved. 



Rhinosimus, Dum. fy Bibr. vii. p. 991. 



1. Rhinosimus guerini. 



Rhinosimus guerini, Dum. §• Bibr. I. c. pi. 12. 



Above uniform brown. 

 Hab. ? 



(i. Rhabdosoma, Dum. Sf Bibr. 



Two pairs of frontal shields, front pair much smaller than the 

 hinder one ; rostral small ; two narrow nasals surrounding the 

 nostril; anterior ocular none, united with the loreal; two (one) 

 posterior oculars. Scales smooth, rounded behind, in fifteen or 

 seventeen rows; anal entire; subcaudals two-rowed. Teeth 

 equal, smooth. South America; East Indies. 



Rhabdosoma, Dum. Sf Bibr. vii. p. 91 . Calamaria, sp., Schleg. 

 Ess. ii. p. 35. Brachyorrhos, Boie, Isis, ltf-?7, p. 540; Wagler, 

 Syst. der Amph. p. 190. 



1. Rhabdosoma semidoliatum. 



Rhabdosoma semidoliatum. Dum. 8f Bibr. p. 93. 



Upper labials five, temporal one. White, with large, broad, 

 black cross bands. 



(i. Adult. Mexico. From Hugo Finck's Collection. 

 /;. Half-grown. Mexico. 



c. Young. Mexico. From M. Salle's Collection. Uniform 

 black. 



