SYSTEMATIC ACCOUNT OF THE SPECIES. 255 
Vent to tip of tail 28 mm. 
Width of head 5 mm. 
Fore leg 6 mm. 
Hind leg 8.5 mm. 
Remarks:— Found throughout Porto Rico in the lowland areas not ascend- 
ing the hills, according to Stejneger; who caught it, however, in many situations 
from among beach pebbles to native houses. It is locally called Sta. Lucia. 
In the Virgin Island Mr. Noble, Mr. Peters, and Dr. Ruthven found it very 
common in dry lowland stations, under stones. I cannot, with this large ma- 
terial before me, find any stable character separating macrolepis from grandi- 
squamis. Certainly in specimens of equal size the dorsal scales differ but very 
little in size. In the topotype of macrolepis, figured, they are actually larger 
than in the specimen of grandisquamis, drawn by the same artist using the same 
method of measurement. While I confess to my surprise at being forced to this 
conclusion I think an examination of the figures of the specimens from the two 
islands will be convincing. I may also add the conditions between the supra- 
nasals of the two specimens drawn, at first sight, so different, might have been 
reversed, with equal frequency. 
23. SPHAERODACTYLUS EXSUL Barbour. 
Plate 7, fig. 1; Plate 20, fig. 1-4. 
Sphaerodac'y'us exsul Barbour, Mem. M. C. Z., 1914, 44. p. 264. 
Type-locality:— Little Swan Island, Caribbean Sea. 
Types: —Tyrr. M. C. Z. 7,894. Paratypes, M. C. Z. 9,959-9,977. 
George Nelson. 
Distribution:— Little Swan Island. 
Diagnosis: —Small with rather large, weakly keeled, imbricate dorsals 
about five or six equalling the distance of tip of snout from the centre of the eye; 
no middorsal granular zone; only three large supralabials to below centre of eye. 
Description:— Typr. Snout rather long and moderately pointed; snout 
a little more than twice as long as diameter of eye; eye nearer ear than tip of 
snout; rostral medium sized with median groove; nostril between rostral, first 
supralabial, a large supranasal and one or two small scales; supranasals of each 
side separated by a single large scale bordering the centre of the rostral behind; 
three large supralabials, the third reaches to well posterior of the centre of the 
eye; third supralabial very long and narrow; superciliary spine present; head 
