MONOGRAPH OF THE EXISTING CEINOIDS. 711 



disk olive, slightly darker in the center than at the margins, with blackish brown 

 reticulations. 



(p) Arms olive, slightly darker ventrally than dorsally; pinnules proximally 

 olive, shading to dark blue distally, slightly lighter dorsally than ventrally ; centro- 

 dorsal olive; cirri bright blue with silver tips; disk olive with blackish brown 

 reticulations. 



(q) Arms olive on both surfaces; pinnules olive dorsally and blue ventrally; 

 centrodorsal light olive; cirri light blue with white tips; disk olive with black 

 reticulations. 



(r) Arms olive on both surfaces, becoming somewhat blue on the bases ven- 

 trally; pinnules olive dorsally and blue ventrally; centrodorsal olive; cirri light 

 blue with silver tips ; disk olive. 



(s) Arms dorsally very dark olive at the base, becoming very dark brown, 

 ventrally very dark brown with light olive markings on alternate sides; pinnules 

 blackish brown with brown tips; cirri silver olive dorsally and light olive ven- 

 trally with silver tips ; disk blackish brown. 



(t) Arms brownish olive dorsally, olive ventrally with a dark brown zigzag 

 stripe ; pinnules olive with extensive chocolate brown irregular markings ventrally ; 

 centrodorsal brownish olive ; cirri olive at the base and with alternating areas of 

 chestnut and olive ; disk olive with irregular chestnut brown markings. 



(u) Arms olive, slightly lighter ventrally than dorsally; pinnules light blue 

 dorsally and dark blue ventrally; centrodorsal light olive; cirri light blue; disk 

 dark olive. 



(v) Dorsal surface pure olive with the joints and syzygies cream color; pin- 

 nules with white or pale cream-colored joints, appearing as white spots on their 

 dorsal surface, and with brown orange tips; oral surface blackish; disk spotted 

 with cream. 



(w) Arms dorsally olive, the pinnules light yellowish green, and ventrally 

 olive with the ambulacral grooves dark blue; pinnules ventrally slightly grayish 

 blue ; disk dark olive with reticulations of blue black. 



(a;) Arms olive, slightly lighter ventrally than dorsally; pinnules dorsally at 

 the arm bases light yellowish green toward the arm tips, gradually becoming 

 blackish blue dorsally, ventrally blackish blue; centrodorsal light olive; disk very 

 dark olive with blackish blue reticulations ; cirri light greenish blue. 



(y) Similar, but the pinnules wholly bluish black. 



(s) Arms and pinnules dorsally dull greenish yellow, ventrally black; disk 

 very dark green ; centrodorsal light greenish yellow ; cirri dull greenish yellow with 

 a slightly bluish tinge. 



(aa) Arms yellowish olive dorsally with a median line of very light straw 

 yellow, ventrally dirty light yellow with the ambulacral groove blackish brown; 

 basal portion of the pinnules dorsally blackish brown with spots of light dirty 

 yellow, becoming clear very light yellow toward (he tips with a slight greenish 

 tinge in the spots: pinnules ventrally blackish brown with spots of light clear and 

 dirty yellow; centrodorsal yellowish olive with the central portion light yellow; 

 cirri yellowish olive with spots of clear light yellow ; disk the same. 



142140 21 Bull. 82 47 



