196 ZIESENHENNE 



Specimens from Thurloe Bay, Mexico, have a uniform light brown 

 disk, and arms of the same color, with cream and gray mottled bands 

 extending the full length. The under disk is a straw tan, uniform, with- 

 out any markings. The under arms are light tan proximally, becoming 

 darker distally and showing a faint arm banding. 



Specimens from the islands of Clarion and Socorro, west of Mexico, 

 have an olive green disk with brown, reddish, or even cream splotches or 

 central disk markings. The arms are a lighter shade of green, with dark 

 green arm bands basally; distally the arm bands become lighter, almost 

 white at the arm tips. The under disk is light green, often tinged with 

 tan, brown or olive. The under arms and oral shields are light green 

 with creamy mottlings, with the arms becoming darker distally and show- 

 ing faint banding. The arm bands are conspicuous in the younger forms, 

 but become inconspicuous with increase in size. 



Some of the specimens from the Galapagos Islands have the same 

 color patterns as the Clarion Island forms. Smaller specimens lack the 

 green. The disks are reddish-brown uniformly speckled with white, yel- 

 low, tan, and brown, giving a salt and pepper effect. The arms are 

 brightly banded with white, gray, and yellow mottled bands alternating 

 with dark brown and slate gray. The under side of the disk also has the 

 specklings over a reddish-brown color, fading into pale yellow proxi- 

 mally. The oral shields and mouth parts are yellow, with the under 

 arms banded proximally with yellow. Distally the bands gradually be- 

 come as dark as the upper arm bandings. 



Specimens of O. panamense from Central America are predominately 

 green. The disks are light to dark olive green with tan, gray or light 

 green markings. The arms are darker green with alternating bands of 

 light green which become mottled white and gray distally. The under 

 disk is a yellowish tan proximally, becoming a speckled red and blending 

 into the upper disk coloration. The under arms are a pale green wash 

 which becomes darker distally and shows arm banding. A few forms are 

 more reddish and brown on the upper disk but are still uniformly 

 speckled. Specimens from Bahia Honda, Panama, have light brown 

 disks speckled with lighter tan, yellow and white, with larger irregular 

 chocolate brown markings. The arms are light brown, banded with 

 grayish-cream for the entire length. The under side is light straw tan 

 with faint arm bands. 



The South American specimens from the coasts of Ecuador, Colombia 

 and Peru have varying shades of olive green with yellow, tan or light 

 green mottling on the disk. The arms are olive green with inconspicuous 

 arm banding proximally, the bands gradually becoming lighter distally 



