734 BULLETIN 82, UNITED STATES NATIONAL MUSEUM. 



Bed and violet: Heterometra nematodon, Heterometra crenulata. 



Red and purple : Ptilometra maeronema. 



Red and orange: Antedon bifida. 



Red and gray : Antedon mediterranea. 



Green and violet : Comatella stelligera. 



Green and brown: Comanthus parvicirra. 



Brown and orange : Heliome.tra glacialis. 



Orange and gray: Antedon mediterranea. 



Gray and white : Oligometrides adeonce. 



In the following species three colors occur : 



Yellow, red, and green : Comantheria briareus. 



Yellow, red, and orange: Antedon bifida. 



Yellow, purple, and white : Lamprometra protectus. 



Yellow, purple, and violet : Mariametra delicatissima. 



Red, white, and orange : Pterometra pulcherrima. 



Red, white, and violet : Zygometra microdiscus, young. 



Brown, white, and purple : Iridometra melpomene. 



In the following species four colors occur : 



Yellow, orange, white, and purple : Pectinometra flavopurpurea. 



Yellow, brown, green, and white: Lamprometra protectus. 



Yellow, brown, purple, and white : Lamprometra protectus. 



Red, brown, purple, and white : Lamprometra protectus. 



In the following species five colors occur : 



Yellow, red, brown, purple, and white: Gephyrometra propinqua. 



Thus white occurs in combination with 



yellow, orange, red, purple, violet, black, gray, green, brown. 

 Yellow occurs in combination with 



white, orange, red. purple, violet, black, gray, brown, green. 

 Orange occurs in combination with 



white, yellow, red, purple, gray, brown. 

 Red occurs in combination with 



white, yellow, orange, purple, violet, gray, green, brown. 

 Purple occurs in combination with 



white, yellow, orange, red, violet, brown. 

 Violet occurs in combination with 



white, yellow, red, purple, green. 

 Black occurs in combination with 



white, yellow. 

 Gray occurs in combination with 



white, yellow, orange, red. 

 Green occurs in combination with 



white, yellow, orange, red, violet, brown. 

 And brown occurs in combination with 



white, yellow, orange, purple, green. 



