160 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



CAPILLASTER ASTERIAS, sp. nov. 



Plate 13, Figure 33; Plate 82, Figure 224 



Diagnostic features. This new form differs from all the other species of the genus 

 in having the cirri long, in the distal half tapering to a fine tip, and composed of 

 elongated segments of which the terminal are only very slightly, if at all, shorter 

 than the longest proximal and bear no trace of dorsal processes. The large size, 

 unusual smoothness, and stout arms seem to be characteristic features. 



Description. The centrodorsal is very small, thin, pentagonal, 3.5 mm. in 

 diameter. 



The cirri are VII, 31, from 30 to 35 mm. in length, very long and slender. The 

 first segment is very short and those following increase in length to the fifth, which 

 is about as long as broad or slightly longer than broad, and still further increase to 

 the seventh or eighth which, with those following, is about twice as long as broad. 

 After about the sixteenth to the twentieth segments the cirri acquire a whitish and 

 highly polished surface, and taper slowly to the tip. There are no dorsal processes. 

 The opposing spine is a minute median tubercle. The terminal claw is much longer 

 than the penultimate segment, slender, and only slightly curved. 



There are in the type specimen 19 rather stout arms which are about 180 mm. 

 long. The 7 IIBr series are all 4 (3 + 4). The 2 IIBr series, both on the same IIBr 

 series, are 3 (2 + 3). The division series are smooth. The brachials are short, very 

 obliquely wedge-shaped, about three times as broad as the maximum length, with the 

 distal edge very minutely spinous, though not produced. 



Notes. A similar specimen has about 15 arms; the cirri are V, all broken. A 

 small specimen has 10 arms about 40 mm. long; the cirri are X, 21, 15 mm. long. 



Locality. Danish expedition to the Kei Islands; Dr. Th. Mortensen; station 82; 

 Sunda Strait (lat. 6 38' S., long. 105 21' E.); 35 meters; sandy mud; July 30, 1922 

 (3). PI. 13, fig. 33; pi. 82, fig. 224. 



Remarks. The reduction in the number of cirri and of the centrodorsal as well 

 as the general appearance suggest that the closest relationship of this species is with 

 C. macrobrachius. 



CAPILLASTER SENTOSA (P. H. Carpenter) 



Plate 9, Figure 28; Plate 10, Figure 29; Plate 11, Figure 31 



[See also vol. 1, pt. 2, figs. 5, 6 (centrodorsal and radials), p. 6; figs. 158, 159 (analysis of arm division), 

 p. 83; fig. 180 (dorsal view), p. 92; fig. 258 (arm), p. 205; figs. 374-377 (pinnule tips), p. 243; 

 figs. 610-612 (comb), p. 317; fig. 685 (disk), p. 341; pi. 10, fig. 1026 (analysis of arm structure); 

 pi. 12, fig. 1031 (arm); pi. 13, fig. 1051 (oral pinnule); pi. 15, fig. 1069 (pinnule); pi. 52, fig. 

 1341 (ventral view, with Ophiomaza)} 



Comatula mulliradiata (part) LAMARCK, Hist. nat. des animaux sans vertebres, vol. 2, 1816, p. 533 

 (redcscription; includes sentosa, Comanthus bennetti, and Comaster multifida, but not multi- 

 radiata of Linn6). DE BLAINVILLE, Diet, des sci. nat., vol. 10, 1818, p. 108 (from Lamarck).- 

 LAMOUROTTX, Encyclop. mdthodique, vol. 2, 1824, p. 205 (from Lamarck). DE BLAINVILLE, 

 Diet, des sci. nat., vol. 60, 1830, p. 229 (from Lamarck). OKEN, Allgem. Naturgesch., vol. 5, 

 Abt. 2, 1835, p. 594 (from previous authors). DE BLAINVILLE, Manuel d'Actinologie, 1834, 



1836, p. 249 (from Lamarck). LAMARCK, Hist. nat. des animaux sans vertebres, ed. 3, vol. 1, 



1837, p. 470 (from previous edition). DESHAYES and MILNE-EDWARDS, Hist. nat. des animaux 

 sans vertebres, ed. 2, vol. 3, 1840, p. 209 (from previous edition). J. MtiLLER, Abhandl. d. k. 

 preuss. Akad. d. Wiss., 1841, 1843, p. 180 (structure). [GERVAIS], Diet, universel d'hist. nat., 



