542 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



There are 36+ arms about 100 mm. long composed of 150 brachials. The first 

 brachials, like the first ossicles following all the axillaries, are rhomboidal and are 

 closely united laterally. The second brachials are shorter than the first and are more 

 wedge-shaped. The first syzygial pair (composed of brachials 3+4) and the five or 

 six following brachials are more oblong. The brachials succeeding are short and 

 sharply wedge-shaped, becoming blunter again at about the fortieth brachial, more 

 oblong, and squarer or slightly elongated toward the arm ends. 



The first syzygy is between brachials 3+4, the second is from between brachials 

 19 + 20 to between brachials 24+25, and the distal intersyzygial interval is 7-19 

 (usually 8-12) muscular articulations. 



The lower pinnules are stiff. The pinnules of the first pair are small. Those of 

 the next pair (P 2 and P b ) are nearly twice their length, and the following ones (P 3 and 

 P c ) are the longest on the arm, consisting of about 30 stout cylindrical segments. 

 P 4 is nearly as long as P 3 , but the pinnules of the next pair (P 6 and P e ) are much 

 smaller, after which the size increases very gradually until near the arm ends; but the 

 outer pinnules, though slender, never become specially long. The pinnules on the 

 fifth and seventh brachials (P b and P c ) are nearly equal on some of the smaller arms, 

 and the relative sizes of all the lower pinnules are apt to vary a good deal upon arms 

 that have been regenerated from the first or second brachials. 



The disk is 17 mm. in diameter, naked and much incised. Sacculi are numerous 

 along the pinnule ambulacra. 



The dorsal skeleton is gray up to the last axillary. The arm bases are gray or 

 white and are marked with a double row of purplish spots. The first of these is near 

 the outer end of the line between the second and third brachials, the next toward the 

 inner end of the line separating the first syzygial pair from the following brachial, and 

 so on alternately on opposite sides for four or five brachials. Beyond this limit the 

 arms are dark purple, or almost black, with occasional white patches. 



Notes. The preceding description is based on the original description by Car- 

 penter. He said that the peculiar coloring and the large size of P 3 and P c readily 

 distinguish this species among the few Antedons hitherto recorded from the Moluccas. 



I examined the type specimen at Leyden in 1910. This is a very characteristic 

 species and was well described by Carpenter. P 2 is twice as long as P^ P 3 is con- 

 siderably longer and stouter than P 2 . P 4 is of about the same length as P 2 but has 

 slightly shorter segments. P 6 is considerably shorter, with only 13 segments, but is of 

 the same character as the preceding pinnules. The lower pinnules are stiffened about 

 as is P 2 in Lamprometra palmata. They are not especially enlarged and are perfectly 

 smooth, not being basally carinate. P 3 is quite appreciably larger and longer than 

 either P 2 or P 4 , there being considerably more difference than in the case of Dichro- 

 metra flagellata. The centrodorsal is large, thick discoidal, with the dorsal pole con- 

 cave. The cirrus sockets are arranged in three irregular and crowded rows. There 

 are 40 arms, all of the IIBr and IIIBr series being developed. The division series are 

 laterally flattened. There are faint tubercles on the last 10 or 12 cirrus segments. 

 None of the cirri remain in situ. 



One of the specimens from Port Galera, Mindoro, has 40 arms 180 mm. long. 

 The cirri are 35 mm. long and are composed of 32-35 segments, of which the outer are 

 carinate dorsally. PI is 14 mm. long and is composed of about 30 segments; it is 



