46 LIZARDS OF THE PHILIPPINE ISLANDS 



somewhat larger scales in irregular transverse rows ; males with 

 a narrow angular series of four to six (very rarely seven) pre- 

 anal pores inclosing a distinct groove bordered by two or three 

 rows of enlarged scales rapidly diminishing in size; scales im- 

 mediately in front of anus small; females with a distinctly dif- 

 ferentiated series of six preanal scales bordered with larger 

 scales ; no femoral pores ; lateral skin fold without, or with only 

 very small, tubercles; digits moderately compressed, the plates 

 under digits well differentiated at base, about eighteen to twenty 

 under longest toe. 



Color in life. — Body rather light brown to black-brown above, 

 with four or five broad, irregular, darker brown spots or bands, 

 usually with darker edges; tail marked with darker and lighter 

 annulations; yellow to light brown or grayish below; tubercles 

 above usually lighter; head reticulated with darker brown. 



Measurements of Gymnodactylus annulatus Taylor. No. 56U E. H. T. 



collection. 



mm. 



Total length 131 



Snout to vent 60 



Tail . 71 



Width of head ' 12.5 



Length of head 18 



Foreleg 19 



Hind leg 28 



Axilla to groin 25 



Remarks. — The largest specimen taken is only 141 millimeters 

 long. Obviously this species is much smaller than the other 

 known Philippine species. This form is most closely related to 

 G. consobrinus Peters. The following differences are evident: 

 In the latter there is a larger number of preanal pores, not ar- 

 ranged in a pubic groove ; the eye is apparently larger ; there are 

 enlarged tubercles on the lateral skin fold, and there is a greater 

 number of rows of scales across the belly. 



The type was collected in July, 1913, by myself. The first 

 specimens, however, were collected nearly a year earlier in the 

 same locality. In 1917 I collected the species on the following 

 Sulu islands: Great Santa Cruz, Basilan, Teipono, Tamuk, Can- 

 cuman, Bubuan (Tapiantana group), Dipolod, Bitinan, Jolo, 

 Tulian, Bubuan (Tapian group), Tawitawi, Papahag, and Bon- 

 gao. It is one of the commonest species in the Sulu Archipelago. 



It was noted that specimens from the various islands showed 

 slight differences, especially in the arrangement and size of the 

 preanal pores and the scales surrounding them. Specimens from 

 Sulu have an average of only four preanal pores. 



