ZooL.— Vol. IV] VAN DENBURGH— COAST ISLAND REPTILES II 



prefrontal and of the scales on the under surface of the 

 forearm, and a tendency toward the formation of fourteen 

 rows of ventral scales shown by the presence of a few small 

 scales along the edge of each lateral fold in addition to the 

 usual twelve longitudinal rows. There are sixty-six ventrals 

 in a row between the chin and the anus. 



Santa Rosa Island. 



I have examined one species of BatracJwseps and two kinds 

 of lizards from this island. The Gerrlwnotus has already 

 been reported from the island, the others are new to its 

 known fauna. 



1. Batrachoseps pacificus Cope. 



Dr. Gustav Eisen secured eight specimens of Batrachoseps 

 on Santa Rosa Island in June, 1897. These are now in the 

 collection of the Academy (Nos. 3877-3880 and 3891-3894) 

 and seem to differ in no respect from the form found on San 

 Miguel Island. All have seventeen costal grooves. 



The measurements of these specimens are 



Length to anus 21 22 24 32 33 35 41 42 



Length of tail 14 16 21 23 23 ... 46 27 



Width of head 3 3 3l^ 5 4K 5 5 6 



Snout to orbit i>^ \]i i>^ 2 2.% 2 2% 2>^ 



Snout to gular fold 5 5 6 7% 7 8 8^ g% 



Snout to fore limb 6 6 8 10 9 10 12 12 



Between limbs 13 14 15 21 19 23 26 26 



Fore limb aVz A 5 6X 6 6 734^ 8 



Hind limb A% A 5 6>^ 6 6% t% 8. 



2. Sceloporus biseriatus becki Van Denburgh. 



A series of eight Scelopori collected on Santa Rosa Island 

 by Dr. Gustav Eisen in June, 1897, seems to show that the 

 differentiation from 5. biseriatus if^s not progressed so far on 

 this island as on San Miguel.^ Thus although all the adult 

 specimens from Santa Rosa Island show the coloration of the 

 San Miguel Island form, only two have the typical arrange- 

 ment of the supraoculars, while the other six specimens have 



1 Dr. Merriam tells me that a parallel is found in the island foxes, whose characters are 

 constant on San Miguel but not on the other islands. 



