252 SPHAERODACTYLUS. 



dorsal zone of smaller scales; snout very short; head broad and swollen; three 

 large supralabials. 



Description: — Type. Snout short, rounded, steeply declivous; eye dis- 

 tinctly nearer tip of snout than ear; rostral small with a median groove; nostril 

 between rostral, first supralabial, a very large supranasal and one small scale; 

 one small scale followed posteriorly by two separate the two supranasals; the 

 third large supralabial extending well back of the centre of the eye ; superciliary 

 spine present but very small; head above and on sides covered with rather large 

 granular scales only very slightly enlarged on the snout; scales of back very 

 large, imbricate, keeled, only about four equalling the distance of tip of snout 

 from centre of eye; mental medium, larger than rostral; a distinct postmental 

 followed by a number of enlarged scales; gulars rather large in comparison with 

 other members of the genus; ventrals rounded, imbricate, smooth, scales of 

 limbs small pointed, keeled; tail missing. 



Colour: — Dark brown, with a light collar anterior to the interscapular 

 region; head with faint darker longitudinal markings; slightly lighter brown 

 beneath. 



Remarks: — Apparently this peculiar and very distinct species is only known 

 from the type-specimen. It is strange that the recent extensive collecting in 

 Jamaica has not rediscovered it. Recently, Dr. Witmer Stone writes me that 

 "during the forties" several collections of reptiles from Jamaica were presented 

 to the Philadelphia Academy by Dr. C. W. Pennock. Whether he collected 

 them himself or secured them from someone else is not disclosed by the records. 

 One of these early collections contained the type of this species. 



21. Sphaerodactylus richardsonii Gray. 

 Plate 5, fig. 3; Plate 19, fig. 1-4. 



Sphaerodactylus richardsonii Gray, Cat. lizards Brit, mus., 1845, p. 16S. 



Sphaerodachilus richardsonii Boulenger, Cat. lizards Brit, mus., 1885, 1, p. 227, pi. 18, fig. 6. 



Type-locality: — -"America." 



Type:— A single specimen in the British Museum. 



Distribution: — This, the largest and most striking member of the genus is 

 confined to Jamaica. It has been found in many scattered localities all in the 

 lowlands or on the lower hills. It is very rare. 



Diagnosis: —  Very large, cross-barred; of the large keeled imbricate dorsals 

 only about five equal the distance of tip of snout to centre of eye and there is no 

 granular middorsal row. 



