364 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



The disk is about 18 mm. in diameter and may be almost completely covered 

 with a pavement of rather small plates or granules, or may bear small scattered 

 plates. 



Color in life. Dr. H. L. Clark says that the color in life is deep reddish purple, 

 becoming very dull on drying. The arms are more or less marked or banded with 

 white or yellow, but the location and amount of the light color show great diversity; 

 sometimes it is confined to the pinnules or to the dorsal side of the tips of the arms, 

 or to regenerating portions of injured arms. 



Notes. In the three specimens recorded by Gislen from Annam the cirri are 

 about XXX, 29-43 in the young individual, and about XXX, 36-41+ in the two 

 large ones. The longest cirrus segments are about one-third again as broad as long. 

 The dorsal spines, according to Gisl6n, are smaller and more triangular in profile than 

 those of A. molleri. 



Hartlaub said that at first sight he had taken the specimen from the Sunda 

 Straits for a 10-armed example of Antedon ludovici (=Craspedometra acuticirra), with 

 which species it shows the greatest similarity in its dark blackish-brown color, in the 

 striking unevenness of the arm bases, in the form of the centrodorsal, and in the 

 arrangement of the cirri. But a close examination, especially of the pinnules, soon 

 shows the differences. 



PI is markedly smaller than P 2 and P 3 , and its 22 segments are elongated from the 

 third onward. It is four-fifths the length of P 2 and nine-tenths the length of P a . 

 Its thickness at the base is three-fourths that of P 2 , but it tapers so rapidly that in 

 general it is only one-fourth as thick as the following pinnules. The segments of 

 P 2 , PS, and P 4 are elongated, but those of the succeeding pinnules are shorter. 



Hartlaub said that corresponding interrelationships of the lower pinnules are 

 shown by a much smaller specimen from Atjeh, Sumatra (=A. molleri), which through 

 his intervention the Gottingen Museum received from the Leyden Museum. This 

 specimen differs strikingly from that from the Sunda Straits in its light color. The 

 color of the latter confirms Carpenter's statement that the color (of milberti) is dark 

 reddish brown bleaching to white. The color of the dorsal surface of the arms from 

 the arm bases outward passes over from the darkest red-brown very gradually into 

 white. 



Hartlaub said it was remarkable that Carpenter did not identify this specimen as 

 milberti and did not include the locality Sunda Straits in the Challenger report. Hart- 

 laub noted that in many places the axillaries and first brachials have a tendency toward 

 wallsidedness. The photographs published by Hartlaub show that this specimen was 

 a very typical example of this species. 



Of the 17 specimens from the Danish Expedition to the Kei Islands station 67, 

 one has 11 arms, a single IIBr 2 series being present. All the other specimens have 

 10 arms, which in the smallest are only 25 mm. in length. 



Of the two specimens recorded by Professor Koehler from Biliton the larger has 

 XX cirri and the smaller XVII only. The dorsal spines are transverse. The larger 

 specimen is very dark in color, purple violet. The smaller has the arms quite colorless 

 and gray, the pinnules alone showing a purple-violet color. 



The largest specimen from Siboga station 33 has the arms 135 mm. long. The 

 centrodorsal is thick discoidal, with the dorsal pole broad and convex, 7 mm. in 





