502 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



striped with deep reddish l>ro\vn; the margins of the bases of the postradial series and 

 the long tubular anal funnel have spots of the same color. These were described as 

 "black and while" when living. Others are ashy or purplish gray to deep purple, 

 almost black. In the paler specimens the skeletal ossicles are marked with narrow 

 hands of deep purple, and the disk has spots of the same color. 



Chadwick said that Antedon okelli is closely allied to A. brevicuneata, A. similis, 

 and A. regalia. It differs, however, from each of these in having the radials visible, 

 a much smaller number of cirri, shorter arms, and carinate basal segments on the 

 low er pinnules. 



Dr. Hubert Lyman Clark said that the specimen from Ceylon that he recorded 

 as Dichrometra tenera is a fine example with 40 arms and the cirri XL, 22-25. 



Reichensperger said that seven of the specimens collected by Dr. Sarasin at 

 ( V\ Ion represent the same variety. There are 30-40 arms that do not exceed 75 mm. 

 in length. In some they are very close together, and in others they are widely sep- 

 arated. The cirri are XXV-XXVIII, 26, from IS to 20 mm. long. Three of the 

 specimens have P 2 very long and slender, reaching 15 mm. in length and composed of 

 26 segments. Pi is 8 mm. long, with 22 segments. P 3 is only 6 mm. long, and P 4 

 is still shorter. The color in alcohol is dark red-brown, with the proximal portion of 

 the arms dorsally and the cirri light brown. In two specimens P 2 is slender, reaching 

 only 10 mm. in length and being composed of about 22 segments. The cirri are about 

 XXV, 25-26, up to 15 mm. long. The color is gray-brown. Two specimens in which 

 P 2 is somewhat stiffer and stouter agree almost completely with the three with stout 

 P 2 described by Reichensperger from Amboina. They are similarly light brown in 

 color. Another damaged specimen from Ceylon, recorded by Reichensperger as 

 Dichrometra palmata (=Munzingeri) has about 28 arms 115 mm. long. The cirri 

 are XXIII, about 25. Most of the cirrus segments are longer than broad, and the 

 distal bear blunt spines. The color is dark brown. 



The specimen from Muhlos, Maldive Islands, has 14 arms 60 mm. in length. 



The specimen from Gwada, Baluchistan, is small. 



The specimen from the Arabian Sea has 42 arms, which are about 65 mm. long. 

 P 2 , though much stouter than Pi and P 3 and greatly elongated, is unusually slender. 



Carpenter described Antedon aequipinna from a specimen without locality in the 

 Hamburg Museum in the following terms: The centrodorsal is discoidal bearing the 

 cirri in a single or partially double marginal row, which leaves the flat dorsal surface 

 free. The cirri arc about XL, 24-28. The segments are tolerably uniform, smooth, 

 and thick. The sixth is about square while those immediately following it may be a 

 trifle longer than broad. The penultimate has a small blunt spine, a trace of which is 

 sometimes visible on the preceding segment. The radials are not visible. The IBr, 

 air short and broad, nearly oblong, and slightly united laterally. The IBr 2 (axillaries) 

 are less than twice the length of the IBr,, and are pentagonal with wide distal angles. 

 'I'll.' post radial series divide three or rarely four times, each division being of two ossicles 

 of which the first are closely united to their fellows. The 43 arms are about 100 

 mm. long and are composed of 160 smooth brachials. The first brachials are almost 

 rhomboidal, relatively long and narrow, and closely united to their fellows. The 

 second brachials ate much shorter than the first and are nearly oblong, slightly longer 

 on the outer than on the inner side. The first syzygial pair (composed of brachials 



