PART 5 A MONOGRAPH OF THE EXISTING CRLNOIDS 53 



segments. P 3 is much longer and stouter, 12 to 15 mm. long with about 25 segments, 

 of which all but the basal two or three are much longer than broad. P 4 is almost as 

 long and stout as P 3 , while P 6 is markedly smaller and P w is the smallest of the 

 pinnules. Spininess of the distal margins of the pinnule segments is not very marked, 

 but with a lens it is evident on the basal and middle segments of P 3 to PI O . 



The color (dry) is deep purple on the calyx and basal portion of the arms; the 

 pinnules, except for some of the larger basal ones, are lighter and distally quite light 

 so that the arms appear distinctly lighter near the tips. The cirri are pure white in 

 striking contrast, the very basal segments, however, being deep purple. 



Notes. Dr. H. L. Clark said that this species is very close to T. nomima and 

 might perhaps be considered a color form of that species, but the difference in the cirri 

 seems to be constant and the coloration of the present form is so striking that it seems 

 better to regard it as a distinct species. 



Dr. H. L. Clark remarked it is evident that this species cannot be considered com- 

 mon in the Broome region. 



The specimen from near the entrance to Roebuck Bay is somewhat larger and 

 darker than the type, the pinnules being all dark. The arms are about 50 mm. long. 

 The cirri are all wanting. 



The superb specimen from Pearl Shoal has the arms about 60 mm. long and 

 cream white, but the pinnules on the basal 10 to 18 mm. of each arm are red-purple, 

 in sharp contrast. The cirri are pure white. 



The specimen from near False Cape Bossut resembles the holotype, but all the 

 cirri and most of the pinnules are wanting. 



Localities. Near the entrance to Roebuck Bay, Western Australia; H. L. Clark, 

 June 1932 [H. L. Clark, 1938]. 



Pearl Shoal; 13 meters; H. L. Clark, September 26, 1929 [H. L. Clark, 1938]. 



Between Cape Villaret and Broome; 9-15 meters; H. L. Clark, June 1932 [H. L. 

 Clark, 1938] (1, M.C.Z. 946). Type locality. 



Near False Cape Bossut; H. L. Clark, September 1929 [H. L. Clark, 1938]. 



Geographical range. Coast of northwestern Australia from Broome southward 

 to False Cape Bossut. 



Bathymetrical range. From 9 to 15 meters. 



History. Monilimetra bicolor was described by Dr. Hubert Lyman Clark in 1938 

 from a specimen from between Cape Villaret and Broome in 5 to 8 fathoms, which 

 he had collected in June 1932. At the same time it was recorded from three other 

 localities and brief notes were given on the specimens. 



TOXOMETBA NOMIMA (H. L. Clatk) 



Monilimelra nomima H. L. CLAKK, Mem. Mus. Comp. Zool., vol. 55, 1938, p. 48, figs. 5, 6, p. 49 

 (description; Broome; Roebuck Bay; near False Cape Bossut; between Broome and Cape Vil- 

 laret); Echinoderm fauna of Australia, 1946, p. 62 (in key), p. 63 (rare at Broome; color variable, 

 predominantly brown). 



Diagnostic features. The fifth and sixth cirrus segments are only a little longer 

 than wide; P 4 is nearly as large as P 3 , having about 30 segments; the brachials are not 

 conspicuously flared. 



Description. The centrodorsal is low-hemispherical, not quite 3 mm. in diameter 

 and well covered with cirrus sockets except at the dorsal pole; the sockets nearest the 

 pole are very small, those near the margin being the largest. 



