NO. 1561. NEW UXSTALKED ('RINOII)S— CLARK. 145 



radial with a high and sharp median keel; distichals two, like the two 

 outer radial.s, and with a prominent keel; 11 to 18 arms, 80 nnn. long 

 (onl\' one-iifth longer than the cirri), the first 8 brachials oblong, 

 rather long, then becoming quadrate; all the brachials are stionglj 

 carinate and compressed, the arms becoming very narrow after the 

 basal third, where the brachials begin to develop overlapping dorsal 

 spines. 



First pinnule considerably the largest, with 8 or 10 elongated joints; 

 the following pinnules decrease in length to the fifth or sixth, then 

 increase again slowly distally. 



Color in life bright yellow. 



Type.—OAi. No. 22637, U.S.N.M.; ivom Alhatross station. No. 4931; 

 30° 58' 30" north latitude, 130" 32' 00" east longitude (off Kagoshima 

 Gulf); 152-103 fathoms; August 16, 1006. 



ig. ANTEDON ASTER, new species. 



This species is nearest to Antedon qumqweostata Carpenter {=A. 

 conifera Hartlaub), of which I have 7 Japanese examples for compari- 

 son; but the cirri are shorter and proportionately stouter, with 35^0 

 joints, the radials and brachials are rounded and not compressed, the 

 former with their edges armed with fine teeth, the distal brachials 

 strongly overlapping, the distal half as well as the distal edge of each 

 joint beset with numerous fine teeth. 



Color in life bright yellow. 



Ty2^e.—C^t. No. 22636, U.S.N.M.; ivom AJhatross station, No. 5088; 

 35° 11' 25" north latitude, 139° 28' 20" east longitude (Sagami Bay, 

 southern Japan); 369-105 fathoms; Octo])er 25. 1906. 



20. ANTEDON ALBOFLAVA, new species. 



Centro-dorsal hemispherical or bluntly conical, bearing about 15 

 cirri; cirri 20 mm. long with 30 short joints, only a very few of which 

 are longer than wide, the sixth and following with sharp dorsal spines. 



First radials visible as paired interradial tubercles, sometimes as 

 a very narrow band below the second radials; second radials short, 

 deeply incised by the axillaries, strongly carinate; axillaries over twice 

 as wide as high, with a pronounced median keel. Thirteen to 15 arms, 

 65 mm. long, of about 110 joints; first 8 or 9 brachials oblong, then 

 triangular, about as long as wide, the distal brachials overlapping; a 

 pronounced median keel on the first two brachials; distichals two, 

 resembling the two outer radials and, like them, strongly carinate. 



First pinnule 6 mm. long with 12 squarish joints, flattened exteriorly; 

 following pinnules successively shorter to the fifth or sixth, which is 

 3 mm. long with 7 short joints, then becoming gradually longer again 

 distally, where the pinnules are 8 mm. long with 17 or 18 rather short 

 joints. 



Proc. N. M. vol. xxxiii— 07 10* 



