Vol. 1] VAN DENBURGH— GECKOS OF GALAPAGOS ARCHIPELAGO 423 



The following table is intended to show the variation in the 

 number and distribution of the enlarged tubercles : 



While there is much variation in color, I have not been able 

 to reach any conclusions of value concerning it. 



The data derived from the study of the postmentals and 

 enlarged tubercles may be arranged in the following tentative 

 key: 



a- — Tubercles of some dorsal rows continued on neck anterior to insertion 

 of fore limbs; snout shorter; dorsal tubercles in six (or rarely five) 

 rows on each side, 

 b. — Tubercles in upper dorsal rows set less closely, usually separated 

 by two or more granules. 



Duncan. 

 b2. — Tubercles in upper dorsal rows set closely, as in other rows, rarely 

 separated by more than one granule. 

 c. — Many enlarged tubercles on top of head. 



Indefatigable, James. 

 Some from Iguana Cove and Vilamil. 

 c2. — Few enlarged tubercles on head. 



d. — Usually not more than three postmentals touching mental. 

 Some from Iguana Cove and Vilamil. 

 Brattle, Cowley Mt., Tagus Cove. 

 d2. — Usually more than three postmentals touching mental. 

 Cowley Island, 

 a^. — Tubercles of dorsal rows absent on neck anterior to insertion of fore 

 limbs; snout longer; dorsal tubercles in five rows on each side. 



Daphne. 



The Duncan and the Daphne geckos seem to be well worthy 

 of recognition as subspecies, and will be named and character- 

 ized as such on a subsequent page. Those from some of the 



