200 MEMOIRS OF THE CARNEGIE MUSEUM 



The anal of No. 56 is single, but shows indications of a fusion of two scales. 

 This specimen has only four lower labials in contact with the anterior chin-shields. 



51. Xenodon neuwiedi Giinther. 



Xenodon neuwiedii Guenther, Ann. & Mag. Nat. Hist. (3), XII, 1863, p. 354, 



PI. V, fig. C. 

 Xenodon neuwiedii Boulenger, Cat. Snakes, II, 1894, p. 148. 



No. 1234, cf, no data. 

 No. 1235, d', no data. 



Counts and Measurements. 



(No. 1234.) (No. 12.35.) 



Anal 1/1 1/1 



Scale-rows 21 21 



Gastrosteges 169 168 



Urosteges 59/59 64/64 



Upper labials 8(4..5) 8(4.5) 



Preoculars 1 1 



Postoculars 2 2 



Temporals 1,2 1, 2 ' 



Total length in mm 330 478 



Length of tail in mm 54 83 



52. Xenodon severus (Linnaeus). 



Coluber severus Linnaeus, Mus. Ad. Frid., 1754, p. 25, PL VIII, fig. 1; Syst. Nat., 



Ed. XII, 1766, I, p. 379. 

 Xenodon severus Boulenger, Cat. Snakes, II, 1894, p. 149. 



The only specimen in the collection is a male (C. M. No. 128) taken by Jose 

 Steinbach at Santa Cruz de la Sierra, Bolivia. Mr. Steinbach furnished no date 

 upon his label. 



(No. 128.) 



Anal 1 



Scale-rows 21 



Gastrosteges 133 



Urosteges 37/37 



Upper labials 8(4.5) 



Preoculars f 2 



ll 

 Postoculars J 2 



13 



Temporals 1,2 



Total length in mm 385 



Length of tail in mm 48 



