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Vol. 5, p. 133-135. December 29, 19 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



A YUNNAN GECKO. 



BY THOMAS BARBOUR. 



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BouLENGER in 1903 (Ann. Mag. Nat. Hist., ser. 7, vol. 12, p. 

 429) described a lizard from Yunnanfu which he called Gehyra 

 yunnanensis, making small comment as to its affinities except to 

 say that it was most nearly related to Gehyra larutensis Boulenger, 

 recently described (Ann. Mag. Nat. Hist., ser. 7, vol. 6, 1900, p. 

 188, type locality Larut hills, 3500 ft., Selangor, Malay Penin- 

 sula) . This species I have not seen and it may not be a Gehyra 

 either. 



Recently the Rev. Dr. John Graham, who discovered Boulen- 

 ger's type, sent me a collection of reptiles from Yunnanfu and in it 

 is a gecko which agrees in all details with Boulenger's description 

 of G. yunnanensis except that the lamellae under all the digits 

 are sometimes divided although there is some variation to be 

 observed. What seems obvious, and in this Dr. Stejneger agrees, 

 is that this lizard is so different in appearance from the other 

 species of Gehyra that it cannot be considered congeneric. In 

 habit and in some digital details it more resembles Hemidactylus. 

 I shall call it 



Cainodactylus, gen. nov. 



Type: Gehyra yunnanensis Boulenger. 



A slender gecko, in habit like Hemidactylus mahouia, the digits 

 free, somewhat dilated basally and strongly expanded distally. 

 A few, usually three, divided chevron-like lamellae under the 

 distal expansions; beneath the small clawless first digit the 

 lamellae may be entire or divided. While this arrangement is 

 very Hemidactylus-like, still the clawless first digit and the ex- 

 tension of the enlarged subdigital scales on to the palm do 

 recall the condition in Gehyra. The three sketches (Text- fig. 

 1-3) make this condition more clear than a verbose description. 



Our specimen furnishes the following redescription of the 

 species. 



133 



