THE HERPETOLOGY OF HISPANIOLA 247 



each having a very heavy median keel in addition to about 30 fine 

 striae; preanal scales scarcely if at all enlarged; limbs strong and 

 well developed, the foreleg longer than the distance from the tip of the 

 snout to the posterior border of the ear; five moderately long fingers, 

 the third very slightly longer than the fourth, both having 12 sub- 

 digital lamellae; toes five in number, long, the fourth the longest, 

 with 19 subdigital lamellae; scales on sole of foot not spinose, but very 

 much rounded and almost tubercular in appearance ; tail nearly cylin- 

 dric, ending in a point, longer than head and body, covered with 

 scales like those of the body but with gradually lessening keels; the 

 two median scale rows underneath the tail very slightly larger than 

 the others. 



Dimensions: Head to posterior border of ear, 25 mm.; head and 

 body, 126 mm.; tail, 204 mm.; hindleg, 44 mm.; foreleg, 27 mm.; width 

 of head, 18 mm. 



Color (in alcohol): Body color olive above, clay color below. A 

 seal-brown lateral stripe, beginning behind the eye, much inter- 

 rupted with light spots and gradually almost disappearing behind the 

 arm, but at intervals down the sides to the tail insertion reappearing as 

 darkened areas of pigment forming dark patches set off by lighter 

 scales ; a pair of seal-brown stripes beginning on the nuchal region and 

 bordering a pale, immaculate median dorsal stripe; at midbody the 

 seal-brown borders tend to break up and appear as wing-shaped 

 markings alternating down each side of the back. Tail with regularly 

 spaced small dark blotches representing a continuation of the dimin- 

 ished body pattern. Arms and legs heavily marbled above with seal 

 brown. Lips and temples with dark-centered scales; top of head 

 immaculate. 



Variations. — This species is exceedingly variable in its scalation as 

 well as in its coloration. In the specimens I have had the privilege 

 of examining, the scale rows vary in number from 35 to 47. On these 

 scales every variation between the minutest striae and the heaviest 

 keeling is apparent. Some specimens, such as the type of Panolopus 

 costatus, M.C.Z. No. 2606, have about a dozen striae with no median 

 enlarged keel whatsoever, so that seen by the unaided eye the scales 

 appear as smooth and slippery as a skink's. Again, others may have 

 twice as many striae and no enlarged one. But some, such as No. 

 61931, which I have just described, and the type of rugosus, U.S.N.M. 

 No. 10260, as well as the largest costatus I have yet seen, No. 

 U.S.N.M. 59435, have immensely developed median keels and present 

 a decidedly rugose impression to the touch as well as to the sight. The 

 number of striae in this genus does seem to depend partly on the age 

 of the individual. 10 



" In the series of 16 galliwasps from Arntully, Jamaica (U.S.N.M. Nos. 79651-79665, 73357), all much the 

 same in size, some individuals have twice as many striae as others, but it is only on the large ones not of this 

 series that the greatest number of striae occurs. 



