38 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



following are slightly longer than broad, becoming nearly or quite half again as long 

 as broad terminally. On the sixth segment a narrow but conspicuous abrupt fan 

 of spines appears on the distal border in the sector toward the arm tip that is, 

 on the concave side of the pinnule as curved. This fan of spines rapidly broadens and 

 increases in length, projecting diagonally over the bases of the segments succeeding 

 and continues to the pinnule tip. 



P 3 is 5-6.5 mm. in length with 15-17 segments. It is not so broad basally as P] and 

 tapers gradually to the tip. The first segment is twice as broad as long, the fourth is 

 about as long as broad, and the distal are twice as long as broad. 



The pinnules following resemble P 3 . 



The color in alcohol is rather dark yellowish brown, with the pinnules and ventral 

 surface purplish and the cirri deep purple. 



The specimen from Pulo Taya was described as a representative of a new species 

 under the name of Antedon abbotti as follows: The centrodorsal is saucer shaped, with 

 the cirri marginal. 



The cirri are XV, 40-45, 23 mm. long. They are long and stout, and the distal 

 segments bear a small low tubercle (in reality two tubercles) dorsally. 



The radials are just visible; their anterolateral angles are free. The IBr t are 

 about twice as broad as long, and bear smah 1 tubercles distally on the lateral edges. 

 The IBr 3 are pentagonal, rather long, also with lateral tubercles. The IIBr series 

 are 2, and resemble the IBr series, but the IIBr] are in apposition for almost their 

 entire length. The elements of the IIBr series and the first brachials have lateral 

 tubercles. There is no further arm division. 



The 20 arms are 100 mm. long. The first 8 or 9 brachials are oblong and those 

 following are wedge-shaped, soon becoming triangular and about as broad as long. 



The first syzygy is between brachials 3+4. In arms having an additional syzygy 

 it is between brachials 42+43 (twice), 43+44, 45+46, 48+49, 55 + 56, and 91+92. 



PI is 5 mm. long, tapering evenly from the base, and is composed of 20 squarish 

 segments. P 2 is 12 mm. long, very stout, composed of 20 short segments. The follow- 

 ing pinnules are rather smaller than PI, becoming elongate distally. 



The color in alcohol is dark purplish brown, with the cirri and the second pair 

 of pinnules (P 2 and P b ) lighter and yellowish. 



Hartlaub described Antedon bella from Noordwachter Eiland on the basis of four 

 specimens as follows: The centrodorsal is of medium size with a small strongly con- 

 cave dorsal pole. 



The cirri are XV-XX, 35-40, reaching 20 mm. in length, moderately stout and 

 only slightly tapering. All of the segments are broader than long. In the proximal 

 half of the cirri the distal dorsal edges of the segments overlap the bases of the seg- 

 ments succeeding, and in the distal half the segments bear two small dorsal spines. 

 The opposing spine is strong. 



The radials are either visible, and then sometimes entirely free laterally, or are 

 partially concealed. The IBr! are entirely free laterally. The IBr 2 (axillaries) are 

 pentagonal, and are slightly, or not at all, longer than the IBri. The division series 

 are widely separated. The IIBr and IIIBr series are 2. There are no IVBr series. 

 The IIIBr series also may be absent, and if present occur only on the outer sides of the 

 IIBr axillaries. There is a moderately strong thickening of the free outer borders of 



