Vol. II, Pt. I] VAN DENB URGH—SLEVIN—GALAPAGOAN LIZARDS 177 



Daphne Island. Black cross-bars over the shoulders and 

 black spots on the front limbs are present in males, but always 

 absent in females. Throats of males are always black, while 

 those of females are white, spotted with black. Some speci- 

 mens may have a slight showing of red on the gular folds. 

 This rarely occurs, but may be seen in either sex. Interocci- 

 pital wider than long. 



James Island. Females lack the black throat which is con- 

 stantly present in the males. They may be sparingly spotted 

 with black, but usually are uniform brown. Throats may be 

 white or grayish, spotted with black. Gular folds may have 

 a slight showing of red, but this occurs more often in the fe- 

 males. Interoccipital wider than long. 



Jervis Island. Females with or without indistinct dorsal 

 spots. Adult males show red on sides of the belly just back 

 of the shoulders. Interoccipital wider than long. 



Brattle Island. Specimens show little variation. The 

 throats of females are, as usual, white or grayish, spotted with 

 black. The black dorsal spots are present in some females, 

 but not as prominent as in the males. Interoccipital wider 

 than long. 



Bank's Bay, Albemarle Island. Females may show indis- 

 tinct dorsal spotting, which is constant in the males. Throats 

 may be red or slate color, spotted with black. Some female 

 specimens have the gular folds and sides of the belly reddish 

 spotted with black. Some few males have red coloring like 

 the females, but not so bright. Interoccipital wider than long. 



Tagus Cove, Albemarle Island. Females may have throats 

 white or grayish, spotted with black, and some specimens are 

 faintly red on gular folds. They may have faint dorsal 

 markings similar to the prominent ones of the males. Inter- 

 occipital wider than long. 



Vilamil, Albemarle Island. Females differ little in coloration, 

 but a few may have red on the gular folds and a trace on top 

 of the head. The throats are white or grayish, spotted with 

 black. A black blotch in front of the shoulders is common in 

 both sexes. The black dorsal spots are constant in males, but 

 rare and indistinct in females. Interoccipital usually wider 

 than long. 



