A MONOGRAPH OF THE EXISTING CRINOIDS 363 



affinis (see under pectinata}. The smaller example has 10 arms 85 mm. long; the 

 cirri are VIII, 2 occurring singly and the others in 3 interradial pairs. 



The specimen from Siboga station 37 is a typical example with the arms 55 mm. 

 long. 



From Siboga station 49a there are 3 small specimens of which the largest has 

 the arms 25 mm. long and the cirri VI. 



From Siboga station 61 there is a small example with the arms 25 mm. long. 



The largest specimen from Siboga station 299 has the arms 45 mm. long and the 

 cirri V. Three others have the arms 40 mm. long and the cirri III, V, and VIII. 

 Another has the arms 35 mm. long and the cirri V. 



A small example from Siboga station 301 has the arms about 40 mm. long and 

 the cirri IX, two of the last being very small. 



The largest individual from the reef at Haingsisi (Siboga station 303) has the 

 anterior arms 85 mm. long and the posterior arms 50 mm. long. The cirri are II, 

 but there are sockets for four more. Another has the anterior arms 80 mm. long and 

 the posterior 45 mm.; the cirri are III. The two additional specimens are small. 



The specimens from Siboga station 285 are both small. 



The largest example from Siboga station 282 has the arms 60 mm. long and the 

 cirri II. Four have the arms 45 mm. long and the cirri III, III, IV and VIII. One 

 has the arms 30 mm. long and the cirri VI. There are 18 others. In another lot 

 from the same station there are 17 specimens with the arms ranging from 12 to 40 mm. 

 in length; most of them have V cirri, one in each interradial angle; the smallest has 

 VI cirri arranged in two interradial pairs with two occurring individually, one of the 

 interradial angles being vacant. 



From Siboga station 250 there is a small example with arm 35 mm. long; the 

 cirri are IX, very slender. The disk has been lost but the interradial areas proximal 

 to the bases of PI are rilled with a strong calcareous webbing. 



The two specimens from Siboga station 274 are large, and have the arms moder- 

 ately swollen. 



From Siboga station 273 there is a specimen with the arms about 70 mm. long, 

 4 of them ungrooved; the cirri are VII. Another individual has the arms about 55 

 mm. long, and stout; 5 of the arms are grooved and 5 are ungrooved; the cirri are VII, 

 arranged in 2 interradial pairs with 3 occurring individually; the disk is regenerating, 

 and the course of the digestive tube is shown by a broad spiral about the anal cone. 

 Two specimens have the anterior arms 55 mm. long and the posterior 35 mm. long; 

 4 of the arms are ungrooved and 6 are grooved; the cirri are V, there being a single 

 one in each interradial angle, in one of the specimens, while in the other they are IV, 

 one of the interradial angles being vacant. A specimen with the arms 50 mm. long 

 has the cirri VI, 4 arranged in 2 interradial pairs and 2 occurring singly, with 1 of the 

 interradial angles vacant. Another specimen has the anterior arms 50 mm. long and 

 the posterior 30 mm. long; there are 4 ungrooved and 6 grooved arms; the cirri are V, 

 1 in each interradial angle. A small specimen has the arms 30 mm. long and the 

 cirri V. A still smaller individual has the arms 15 mm. long and the cirri VIII, 

 arranged in 2 interradial pairs with 3 occurring singly. 



The 2 specimens from near Udjir, Aru Islands, described by Reichensperger are 

 large with the arms strongly swollen and with a prominent median keel. In 1 the 



