NO. 5 CLARK : ECHIXI OF WARMER EASTERN PACIFIC 249 



took them at 25 stations between 28° 12' N and 34° 24' 30" N at depths 

 of 20-113 fms, including Guadeloupe Island. 



Type.— U.S.N. M. No. 32660. 



Type locality. — Albatross Station 2930, off San Diego, 60 fms. 



Depth.~S-\6() fms. 



Specimens examined. — 5,090 specimens from 155 stations. 



Lytechinus pictus (Verrill) 



Plate 41, Fig. 15 



Psammechintis pictus Verrill, 1867, p. 301. 



Lytechinus pictus H. L. Clark, 1912, p. 258, pi. 107, figs. 12-14. 



This species has undoubtedly been confused with the preceding and 

 the suggestion has been made that the two are identical but show great 

 diversity. The thousands of specimens of anamesus taken by the Velero 

 are supplemented by some 488 specimens of pictus, ranging from 2 to 38 

 mm in diameter. When young the two species are so different they could 

 not be confused but mature specimens may look veiy much alike. Young 

 anamesus are pure white with long, acicular white spines. As they mature 

 the color becomes more yellowish, and blotches of gray or dull purple 

 appear on the upper side of the test, but there is no hint of red or violet 

 on either test or spines. When adult, the slender, acute, unhanded spines 

 are quite different from the relatively short, rather thick, blunt spines of 

 pictus. In specimens of pictus less than 8 mm in diameter the primary 

 spines of the oral side at least are definitely reddish, ranging from dull 

 pink to a clear rose purple, with one or more definitely white bands. In 

 some cases the bands are not evident but there is more or less red or rose 

 purple evident on at least the distal part of the spines, but after the test 

 is more than 10 mm in diameter the spines are unicolor, gray, brown or 

 red purple. Often the basal half is nearly white, the distal half more or 

 less dull rose or dull yellow. In young specimens there is usually rose 

 purple or violet evident on the abactinal system but this soon disappears 

 and the whole system becomes a dull gray. Young pictus with banded 

 rose purple spines may be easily confused with young Strongylocentrotus 

 purpuratuSj but in Lytechinus the color is much more pink than in pur- 

 puratus. In anamesus there is never any pink or rose purple shade in the 

 coloring of the spines but yellow, yellow brown or dull orange may be 

 marked ; usually the shades are dull gray or olive when not yellowish or 

 brown ; on the oral surface the spines are commonly white. In pictus there 

 is usually no white on the oral side but some individuals are as white as any 

 anamesus. 



