136 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. xxxiii. 



7. ANTEDON ANTHUS, new species. 



Centro-dorsal long- and columnar, terminating in a truncated cone 

 with a shallow central crater having a coarsely papillose border and 

 5 low interradial ridg-es. The cirri are very regularly arranged in 10 

 vertical rows, usually of 2 each; the vertical rows are in pairs, each 

 pair separated from its neighbors by a broad vertical line or shallow 

 groove, radial in position. The cirri are 20 in number, 60 mm. long, 

 with 80 joints of fairly uniform width, but becoming rather narrower 

 distally. The first 6 or T joints bear dorsal spines; the following 

 joints are smooth up to about the twentieth, where spines begin again 

 to develop, becoming prominent distall}' The first 7 or 8 joints are 

 wider than long, then squarish or slightly longer than wide to about 

 the twentieth, then gradually becoming shorter distally. 



The ends of the basal rays are just visible as small tubercles at the 

 base of the upper pair of cirri in each interradial area. The radials 

 resemble those of Antedon longicirra^ but the axillaries are shorter. 

 The radials and first brachials are rounded, but not very convex, 

 and there is no central tubercle as described in A. longicirra nor 

 median keel as in A. macropoda. The first 7 brachials are short 

 and oblong, the following triangular, wider than high, after the for- 

 tieth becoming compressed and carinate and developing a forward 

 projecting dorsal spine. The radials and first 10 brachials have 

 flattened sides. Distichals 2, like the 2 outer radials. A syzygy in 

 the third (in one case the fourth) brachial, again in the eighth-four- 

 teenth, and distally at intervals of 2-5 (usually 2) joints. The arms 

 are 13 in number, 80 mm. long. 



First pinnule comparatively short, with joints, stout basally, 

 tapering to a point. Second pinnule more than half as long again, 

 with 12 joints; third pinnule about the same, or slightly shorter; the 

 next 2 or 3 are very slightly shorter, the length then increasing dis- 

 tally. All the pinnules are flattened on their outer sides, with their 

 distal edges sharply carinate. 



Color in life, dull brownish yellow, the cirri almost white. 



Type.-^C^t. No. 22625, U..S.N.M.; from Albatross station No. 4936; 

 30° 54' 40" north latitude, 130° 37' 30" east longitude (off Kagoshima 

 Gulf); 103 fathoms; August 16, 1906. 



8. ANTEDON MACROPODA, new species. 



Centro-dorsal columnar, the terminal portion conical, ending in a 

 rosette of 5 tubercles, radiall}" situated. Cirri about 15 in number, 

 somewhat longer than the arms, 100 mm. in length, situated in 10 rows 

 very close together, not separated ofl' into pairs, as in Antedon 

 anthus^ one, sometimes two, in each row; cirri with 100-120 joints, 

 those in the proximal half but slightly, if any, longer than wide, those 



