A MONOGRAPH OF THE EXISTING CRINOIDS 1 13 



Color in lije. Dr. H. L. Clark says that in life the colors are yellow and purple, 

 but the relative amounts of the two, their distribution, and the shades show infinite 

 variety. For the yellow the shades range from almost white to deep buff, and for the 

 darker color from light grayish purple to a very deep, rich, reddish purple. The 

 color arrangements are too diversified to warrant description, but it is common to 

 have the arms banded either broadly or narrowly; often only the pinnules are banded 

 and the dorsal side of the arms is prettily mottled, or simply unicolor. 



Notes. In Dr. John Anderson's collection from King Island, Mergui Archipelago, 

 there were five specimens of this species. Of these, two were labeled "sublittoral," 

 two were found on corals, and the youngest had the cirri coiled around a gorgonian 

 (Plexaura) . As described by Carpenter, the arms of the largest reached 100 mm. in 

 length. Compared with the specimens of Z. elegans collected by the Challenger in 

 the Arafura Sea and Torres Strait the earlier bracliials are relatively shorter with a 

 more wedge-shaped outline and a greater tendency to overlap. The number of arms 

 rarely exceeds 30. There are no IVBr series, and the full complement of IIIBr series 

 is rarely found on any ray. Carpenter noted that as a rule only the 2 inner IIIBr 

 series are present, so that there are 6 arms to a ray arranged in 1, 2, 2, 1 order. The 

 IIBr series are sometimes absent. There is little tendency to any variation from the 

 IIIBr 2 type. The rays of the largest specimen from King Island are in contact, and 

 the elements of the IIBr series sometimes exhibit a tendency to the straight edged and 

 wall-sided form. Two of the specimens are almost black, another is a dark reddish 

 brown mottled with lighter patches, and one has a more uniform lighter shade of the 

 same color. 



One of the two specimens from 80 miles northwest of Penang has 30 arms 90 mm. 

 long. Of the 10 IIBr series present 9 are 4(3+4) and one is 2. Two of the IIIBr 

 series are 4(3+4); these are situated side by side on the IIBr 4(3+4) series which is 

 paired with the IIBr 2 series. There is a single IVBr 4(3+4) series on the innermost 

 (nearest the midradial line) branch from a IIIBr 2 series. The division series are in 

 close lateral contact. The longest cirri have 29-35 segments. The transition seg- 

 ment, which is not strongly marked, is usually the seventh or eighth. The color is 

 brownish yellow with narrow and widely spaced deep purple cross bands on the arms. 



The other specimen has 14 arms 110 mm. long. All 4 of the IIBr series are 

 4(3+4). The cirri are XXI, 33^0, 35 mm. in length. The color is light grayish, the 

 arms with narrow and widely spaced deep purple cross bands. 



Of the specimens collected by Svend Gad at Singapore one dated April 20, 1906, 

 has 19 arms 70 mm. long. There are 8 IIBr series, all 4(3+4), and a single IIIBr 2 

 series, developed internally. The bracliials after the fourth or fifth have strongly 

 produced and very finely spinous distal edges, making the arms very rough to the 

 touch. The brachials are very short, in the proximal fourth of the arm wedge-shaped 

 and in the distal portion oblong as in Himerometra. The cirri are XX, 25-28. The 

 first cirrus segment is about twice as broad as long and those following gradually 

 increase in length to the fourth or fifth, which is about as long as broad. The follow- 

 ing three or four segments are similar, and those succeeding gradually decrease in 

 length so that the terminal seven or eight are nearly twice as broad as long. The 

 sixth is a transition segment, its proximal half having a dull and its distal half a highly 

 polished surface. The transition segment does not decrease in width distally, nor is it 



