A MONOGRAPH OF THE EXISTING CRINOIDS 155 



are very abundant along the ambulacra of the arms and pinnules. As preserved in 

 alcohol the skeleton is almost white, with the perisome gray or brownish. 



I examined four of these specunens at the British Museum in 1910. The longest 

 cirrus segments are nearly twice as long as broad, and the dorsal spines on the outer 

 cu-rus segments are long and sharp. In 1925 Dr. Torsten Gisl^n also examined these 

 specimens. He remarked that the disk is large, bulging out between the arms, and 

 strongly incised between the primary arms. These specimens are considerably 

 smaller than the specimen of the same species he described in 1922. 



Carpenter said that disciformis, while resembling manca in its spiny cirri and in 

 the absence of P^, differs from it altogether in having no IIIBr axillary, and in the 

 constant presence of Pj. Carpenter remarked that, the division series being quite 

 free laterally, it stands rather near to Antedon marginata (= Stephenometra protedus), 

 resembling it also in the elongated joints, in the great size of Pj and P^, and in the 

 absence of a IIIBr axillary, though sharply distinguished from it by the absence of 

 Pa and by the very spiny cirri. Carpenter noted that the extreme flatness of the 

 centrodorsal and the lunitation of the cirri to its margin so as to leave the dorsal 

 surface free recall the characters of the Comasteridae, but the high articular faces of 

 the radials, which are much wider below than above, are those of a typical endocyclic 

 form. The lower parts of the fossae lodging the great ventral muscles are cut off from 

 their upper portions, and the same peculiarity appears both on the proximal faces of 

 the IBr, and on the distal faces of the axillaries. The ventral surface of the centro- 

 dorsal is marked by five minute radial pits corresponding to the ventral ends of the 

 radial axial canals which are seen on the under (dorsal) surface of the radial pentagon 

 (See Part 2, p. 37.) 



The three specimens from Albatross station 5356 are all small. One has 23 arms 

 45 mm. long, and is entirely deep purple in color. Another has 15 arms about 40 mm. 

 long. The third has 10 arms 40 mm. long and the cirri 12 mm. long with 26-28 seg- 

 ments. 



One of the specimens from Amboina Bay has 14 arms 60 mm. long. The cirri are 

 XV, 22-25, 22 mm. long. The color in alcohol is hght purplish gray with numerous 

 red-brown dots on the dorsal surface. In color this individual closely resembles the 

 large specimen of Colobometra discolor from Jolo, but the cirri are not banded. 



The other specimen from Amboina Bay has 14 arms which were probably about 

 80 mm. long. The cirri are XVII, 25-27, 15 mm. long. The color in alcohol is dark 

 purphsh brown, the division series and arm bases with a narrow median whitish line. 

 The arms beyond the bases are narrowly banded brown and whitish. The pinnulea 

 are purplish brown. The cirri are light purphsh yellow. 



Of the two specimens from the Danish Expedition to the Kei Islands station 54 one 

 has 10 arms 45 mm. long and the other has 11 arms 60 mm. long. 



The seven specimens collected by the Danish Expedition to the Kei Islands oS 

 Kombit, Banda, have 17, 14, 14, 14, 12, 11, and 10 arms. 



The specimen from Challenger station 192 was described by Dr. P. H. Carpenter 

 as a new species under the name of Antedon man^a. The centrodorsal is a thick disk 

 with a flattened dorsal surface and marginal cirri. The cirri are about XX, 25-30. A 

 few of the segments are longer than broad, and dorsal spines are developed from the 

 eighth onward. The radiaJs are concealed. The IBri are oblong, and are quite free 



