A MONOGRAPH OF THE EXISTING CRINOIDS 



149 



No. 3 (station 47): The cirri are XXXI, 9-10, from 2.5 to 3.5 mm. long. The 

 IBr2 are as in the preceding specimens. The arms are broken, but they were probably 

 between 20 and 25 mm. long. Pj is 3 mm. long, with 8 segments, of which the third is 

 two and a half and the fourth three and a half times as long as broad. Pj is from 1.2 to 

 1.5 mm. long, with 5 or 6 segments. P3 is 2 mm. long, with 7 segments. The disk is 

 1.8 mm. in diameter. 



No. 4 (station 45): The centrodorsal is hemispherical. The cirri are about 

 XXV, in two rows, 9-11, from 2.0 to 4.5 mm. long. The segments are very markedly 

 constricted centrally, those before the antepenultimate being twice as long as broad 

 and the antepenultimate half again as long as broad. The cirri in the distal row 

 have very much longer segments than the others, with relatively large opposing spines 



a 



d 



dTZ 



mm 



Figure 9. — a, Anledon longicirra 

 (A. H. Clark), longest cirrus 

 segment, b, A. farviflora (A. 

 H. Clark), longest and c, distal- 

 most cirrus segments, d, A. iris 

 (A. H. Clark), P,. 



and terminal claws. The IBri are six times as broad as long. The IBr2 are rhombic, 

 twice as broad as long, shorter and with sharper lateral angles than in the preceding 

 specimens. The arms are 15+ mm. long, rather smooth; the first brachials are basally 

 in contact interiorly. The distal intersyzygial interval is 3 muscular articulations. 

 Pi is 1.5 mm. long, with 8 segments. P2 is 1.0 mm. long, with 6 segments. P3 is 

 1.8 mm. long, with 7 or 8 segments and bearing a genital gland. The disk is 2.5 mm. 

 in diameter and the anal tube is 1.3 mm. in height. 



No. 5 (station 45): The cirri are about XXV, 10-11, from 2 to 3 mm. in length; 

 the fourth segment is about four times as long as broad. The arms are about 15 mm. 

 long. Pi is 1.0 mm. long, with 6 segments. P2 is 0.5 mm. long, with 4 segments, 

 or lacking. The disk is 1 mm. in diameter. 



No. 6 (station 44) : The centrodorsal bears about XXV cirrus sockets. The IBri is 

 five times as broad as long, with a thickened rim against the radial. The IBr2 is three 

 times as broad as long, rhombic. Pi is 1.2 mm. long, with 7 segments. P2 is 0.8 mm. 

 long, with 4 or 5 segments. P3 is 1.2 nmi. long, with 6 segments. 



No. 7 (station 54): The centrodorsal is 0.5 mm. in diameter, low and rounded, 

 with about XXXV cirrus sockets arranged in 3 rows. The center of the dorsal pole 

 is occupied by a small rounded star with the scar left by the central canal of the stem. 

 The distal borders of the radials are even with the edge of the centrodorsal. The 

 IBri are four times as broad as long, with the lateral borders converging distally. The 



