368 ^^6 Philippine Journal of Science 1917 



by one or more individuals. I obtained it also in the low moun- 

 tains at Isabela, but not on Mount Caniaon save at its base. I 

 doubt if this species is found above an altitude of 500 meters in 

 the Islands. There are 22 specimens in the collection. 



Gekko monarchus Dumeril and Bibron. 



A single specimen taken in the mountains near Isabela has 

 been referred to this species. It is an immature female. The 

 spots on the back are blurred, not distinct as in other specimens 

 examined. However, I do not doubt that it is correctly placed 

 with this species. 



Hemidactylus frenatus Dumeril and Bibron. 



This species is very common in the lowlands, but probably 

 does not ascend to any great altitude. It is found under rocks 

 on the cogon-covered hills on the central-western coast. This 

 species is the only one of the four common house geckos that I 

 have found in such a habitat, the others preferring houses and 

 trees. However, this species is also very common in houses. 

 Numerous specimens were taken. 



Peropns mutilatus Weigmann. 



Common in houses everywhere in the lowlands. Two speci- 

 mens taken at Isabela in the mountains were distinctly spotted 

 with dark brown over the "ventral surface of body and tail, with 

 a whitish line through the eye; these markings are wanting 

 in other specimens. One specimen from Mindoro resembles 

 these. It is not improbable that they represent a distinct varia- 

 tion. Numerous specimens in the collection. 



Lepidodactylus christiani sp. nov. Plate II, fig. 1. 



Type. — No. 900, E. H. T. collection. Mount Caniaon, December 

 23, 1915; elevation about 700 meters. E. H. Taylor, collector. 



Description of type. — Head not distinct from neck (probably 

 due to abnormal deposits of calcareous matter under the skin of 

 the neck on both sides) ; snout rather long, almost twice diameter 

 of eye; distance from nostril to eye equal or minutely longer 

 than distance from eye to auricular opening. (Auricular open- 

 ing on the left side abnormally wanting, due to calcareous de- 

 posits.) Rostral more than twice as wide as long, its upper 

 margin irregular; nostril bordered bv the first labial, a large 

 postnasal, which is in contact with two labials and three supra- 

 nasals (four on the right side), the supranasals completely se- 

 parate the rostral from the nostril ; these scales form a rounded 



