A MONOGRAPH OF THE EXISTING CRINOIDS 639 



other is smaller, with 20 arms. There are present 9 IIBr series, of which 4 are 2 and 



5 are 4 (3 + 4). The single IIIBr series, which is 2, is internally developed on a ray 

 with 2 IIBr 2 series. 



One of the specimens from Solor is small, with 20 arms and the cirri X. The 

 other is medium sized, with 24 arms and the cirri IX. In both the cirri are compara- 

 tively well developed and show an approach to the type found in Comanthus samoana. 



Carpenter said of these specimens that they are of the same type as the originals 

 of Miiller's Alecto timorensis. They both agree in the relatively small size of P 2 and 

 in having the terminal comb on the lowest pinnules longer than in the Timor specimens 

 (timorensis), though the number of pinnules bearing it is small, not more than 5 or 



6 on each arm. The overlap of the brachials also is less marked. Carpenter added 

 that, while resembling one another in their differences from the types of timorensis, 

 the 2 specimens from Solor are nevertheless very unlike. The smaller one has stiff 

 pinnules which are not well clothed with perisome, while in the other, which is but 

 little larger,the pinnules of the lower and middle parts of the arm are stout and 

 fleshy, very much as in one of the Ubay varieties of the Philippine series. The mouth, 

 too, does not occupy its usual interradial position, and the anus is not quite in the 

 center of the disk. The arms of both individuals, though all grooved, are dimorphic, 

 the posterior ones being shorter and tapering more rapidly than the anterior. 



The specimen from Siboya station 58 is small, with 14 arms. 



The 13 specimens from Siboga station 60 are all medium sized, with the cirri 

 irregular in occurrence and, though present in all, slender and weak. They present 

 the following characters: 



The 22 arms are 80 mm. long. All of the IIBr series are present, and there are 

 2 IIIBr series on a single IIBr series. The cirri are I, 11, 6 mm. long. 



There are 21 arms, and V rudimentary cirri on a single semicircumference of 

 the centrodorsal. 



There are 20 arms. The cirri are X, 6 mm. long. 



There are 19 arms; 2 of the IIBr series are absent, and a single IIIBr series is 

 present. There are V cirri. 



There are 19 arms, one of the IIBr series being absent, and a single cirrus. 



There are 17 arms and VI cirri 5 mm. long. 



There are 17 arms and IV cirri. 



There are 17 arms and IV cirri. 



There are 19 arms, one of the IIBr series being absent, and IX cirri. 



There are 16 arms, one postradial series having 2 IIBr series. The cirri are V. 



There are 15 arms and IX cirri. 



There are 15 arms and VII cirri. 



There are 14 arms, 2 of the postradial series having 2 IIIBr series each, and 

 IV cirri. 



The specimen from Siboga station 303 has 17 arms 95 mm. long. Of the 7 IIBr 

 series, 5 are 4 (3+4) and 2 are 2. There are IV cirri, all broken. 



Of the 3 small specimens from Siboga station 294, 1 has 12 and 2 have 11 arms. 



The 2 specimens from Atapupu, Timor, both have about 20 arms. One has 4 of 

 the IIBr series still attached, 3 of which are 2, while the other is 4 (3 + 4). The other 



