THE HERPETOLOGY OF HISPANIOLA 



307 



brown band from nostrils over ear and shoulder, gradually becoming 

 lighter and disappearing on the groin; labials dark edged; a short 

 light stripe beginning on the upper lip, passing beneath the ear, 

 reaching the shoulder and fading out on the sides; lower parts pale 

 bluish gray. 



Dimensions: Snout to vent, 87 mm.; tip of snout to posterior 

 border of ear, 15 mm.; axilla to groin, 54 mm.; fore limb, 19 mm.; 

 hind limb, 25 mm. ; tail reproduced. 



Variations. — The Museum of Zoology of the University of Michigan 

 has recently acquired three fine specimens of tliis rare skuik from 

 Ciudad Frujillo in the Dominican Eepublic through the efforts of 

 C. C. Roys, one of their student collectors. These specimens, a 

 female and two males, agree well with the only other known His- 

 paniolan example, M.C.Z. No. 3617, in almost every way. Their 

 similarities and differences may be easily grasped from table 56, 

 based on a table given by Dr. Dunn (1936) in his "Notes on American 

 Alabuyas." 



The pattern is very similar in all the specimens, varying only in 

 distinctness but very little in position or width of stripes. 



Specimens examined. — M.C.Z. No. 3617 (type of M. nitida), Santo 

 Dommgo, 1859, F. Weinland; 3 specunens (M.Z.U.M.), Ciudad 

 Frujillo, Dominican Republic, 1937, C. C. Roys. 



Table 56. — Variations in joxir specimens of Mabuya mabouj'a sloanii {measure- 

 ments in millimeters) 



Characteristic 



M.Z.U.M. 



5 



Supranasals in contact... 



Prefrontals in contact 



Parietals in contact 



Nuchal pairs 



Supraoculars 



Suboculars 



Scales around body 



Scales from chin to vent.. 



Anals ^ 



Limbs overlapping 



Length of head and body 

 Length of tail 



No 

 No 



Slightly 



1 



3 



5 



30 



62 



3+2+3 



Yes 



82 



128 



' Tip reproduced. 



2 Most of tail reproduced. 



Suborder Serpentes 



Nine genera of snakes belonging to three families are known to 

 occur in Hispaniola. None of the dangerously poisonous kinds are 

 found there, although the genus laltris has grooved fanglike posterior 

 maxillary teeth. 



