A MONOGRAPH OF THE EXISTING CRINOIDS 611 



The specimen collected by the Danish expedition to the Kei Islands at Banda 

 has 42 arms 130 mm. long. Of the 10 IIBr series, 8 are 2 and 2 arc 4 (3+4). Of the 

 18 IIIBr series, 12 are 4 (3 + 4) and 6 are 2. The 4 IVBr series are 2. The centrodorsal 

 is small, pentagonal with somewhat produced angles, and its dorsal surface is slightly 

 below that of the radial pentagon. One of the specimens from off Neira, Banda, has 

 32 arms, of which the very attenuated anterior arms reach 130 mm. and the short 

 posterior arms about 60 mm. in length. Of the 10 IIBr series, 8 are 4 (3 + 4) and 2 

 are 2. The cirri are III, 10-11, 6 mm. long, small, weak, and slender; in addition 

 there are some very undeveloped cirri. The other specimen also has 32 arms which 

 are 105 mm. long. Six of the IIBr series are 4 (3 + 4) and 4 are 2. Two of the IIIBr 

 series are 2. The centrodorsal is greatly reduced and stellate. 



One of the specimens from Amboina collected by the Danish expedition to the 

 Kei Islands has 35 arms from SO to 100 mm. long. Of the 10 IIBr series, 9 are 4 (3 + 4) 

 and 1 is 2. All of the other division series are 4 (3 + 4). The cirri are II, 13-14, with 

 2 rudimentary in addition. The other specimen from Amboina has 31 arms 100 mm. 

 long. Nine of the IIBr series are 4 (3 + 4) and 1 is 2. All the other division series are 

 4(3+4). The cirri are IV. 



Hartlaub recorded 19 specimens of parvicirra from Amboina, all of which seem 

 to belong to this form. 



They have a very small centrodorsal which is commonly pentagonal and bears 

 not more than X cirri of about 12 segments. The cirri are short and slender. In 2 

 specimens they are entirely absent, wliile in several others only traces of them are 

 present. 



The radials are always partiallj' and often wholh^ visible. The IIBr series are 

 usually both 2 and 4 (3+4) in the same individual, with a strong tendency to the 

 development of IIBr 2 series. Oidy in 5 specimens are IIBr 2 series entirely absent, 

 while in the remaining 14 one has 7 IIBr 2 series and another has 6. 



As a result of the regular development of soine, or even of all, of the IIIBr series, 

 the number of arms is always more than 20, and is often more than 30. The length 

 of the anterior arms may reach 170 mm., though generally they are shorter. 



The disk is naked. 



The color in alcohol is often light bro\vn with a tinge of olive and with the brachial 

 articulations dark, frequently with a dark mediodorsal line on the division series. 



The specimen from Batjan has 41 arms which are about 100 mm. long. Three 

 cirri remain attached to the centrodorsal. 



One of the specimens from the Danish expedition to the Kei Islands station 30 

 has 39 arms, of which the anterior become very attentuate distally and reach a length 

 of 180 mm. Of the 10 IIBr series, 7 are 4 (3 + 4) and 3 are 2. There are 19 IIIBr 

 series, all 4 (3 + 4). The centrodorsal is verj' small, 3 mm. in diameter. There are 

 2 almost fully developed, but slender and delicate, cirri, 1 much smaller, and 2 buds 

 of 1 segment each. The 2 cirri have each 14 segments and are 10 mm. long. Another 

 specimen has 31 arms; of the IIBr series, 7 are 4 (3 + 4) and 3 are 2. There is a 

 single cirrus with 11 segments. A third example is similar to the last. The fourth 

 specimen has 25 arms, of which the anterior are greatly attentuated and elongated 

 and reach 160 mm. in length, the posterior being 90 mm. in length. Of the 10 IIBr 



