252 roi.i iiuin.r. 



1. Arrhyton taBniatum. (PLATE XII. fig. 2.) 



Arrhyton fceniatum, Giinth. Cat. p. 244 (1858); Cope, Proc. Ac. Philad. 



1860, p. 421 ; Gundl. Repert. FU.-Nat. Cuba, li. 1866, p. 110, and 



Erp. Cubana, p. 75 (1880). 

 Arrhyton fulvum, Cope, Proc. Acad. Philad. 1802, p. 82. 



llostral twice as broad as deep, visible from above ; nasal semi- 

 divided ; suture between the internasals hardly half as long as that 

 between the praefrontals ; frontal slightly longer than broad, thrice 

 as broad as the supraocular, as long as its distance from the end of 

 the snout, shorter than the parietals ; no loreal, praefrontal in con- 

 tact with second labial ; one prae- and two postoculars ; temporals 

 1 + 2 ; seven tipper labials, third and fourth entering the eye ; four 

 lower labials in contact Avith the anterior chin-shields, which are 

 longer than the posterior. Scales in 17 rows. Ventrals 171 ; anal 

 divided ; subcaudals 75. Yellowish ; upper surface of head and 

 three longitudinal streaks brown ; lower parts white. 



Total length 230 millim. ; tail 50. 



Cuba. 



a. Hgr. (V. 171 ; C. 75). Cuba. Zoological Society. 



(Type.) 



2. Arrhyton vittatnm. 



Cryptodacus vittatus, Gundl. Sf Peters, Man. Berl. Ac. 1861, p. 1002 ; 



'Cope, Proc. Ac. Philad. 1862, p. 339; Gundl. Repei-t. Fis.-Nat. 



Cuba, ii. 1866, p. 116; Bocourt, Miss. Sc. Mex., Kept. p. 501, 



pi. xxxv. fig. 7 (1883). 

 Arrhyton bivittatum, Cope, Proc. Acad. Philad. 1862, p. 82. 



llostral twice as broad as deep, visible from above ; nasal undi- 

 vided ; suture between the internasals shorter than that between 

 the prafrontals ; frontal as long as broad or a little longer, much 

 broader than the supraocular, as long as its distance from the end of 

 the snout, a little shorter than the parietals ; loreal square or longer 

 than deep ; one pree- and two postoculars ; temporals 1 + 2 ; seven 

 upper labials, third and fourth entering the eye ; four lower labials 

 in contact with the anterior chin-shields, which are as loug as or 

 longer than the posterior. Scales in 15 or 17 rows. Ventrals 

 115-116; anal divided; subcaudals 64-73. Yellowish above, with 

 three brown longitudinal lines, the median sometimes indistinct; 

 yellowish white inferiorly. 



Total length 297 millim. ; tail 105. 



Cuba. 



3. Arrhyton redimitnm. 



Colorhogia redimita. Cope, Proc. Ac. Philad. 1862, p. 81. 

 Cryptodacus redimituf, Bocourt, Miss. Sc. Mex., Rept. p. 501, 

 pi. xxxv. fig. 8 (1883). 



Nasal undivided ; prajfrontals fused to a single shield ; frontal 

 broad, as broad as long, shorter than the parietals ; loreal longer 



