202 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



EXPLANATION OF PLATE XI 



Chart of counts of scales around the middle of the body in one hun- 

 dred specimens each from : 



A. — Indefatigable and South Seymour islands. 



B. — James Island. 



C. — Narborough Island. 



D. — Albemarle Island. 



