A MONOGIIAPH OF THE EXISTING CRINOIDS 213 



the basal is sharply gabled or more or less carinate. P4 is 3 mm. long with 12 segments 

 and resembles P3; the terminal segment is a small conical point, and the three preced- 

 ing this are somewhat over twice as long as broad. The pinnules following resemble 

 P4. The distal pinnules are 3.5 mm. in length with 12 segments of wliich the first is 

 much broader than long, the second is about three times as long as broad, and the 

 remainder are about twice as long as broad or slightly longer. They arc roundedly 

 prismatic with the adoral ventrolateral border of the segments slightly produced in 

 the form of a thin rounded keel. 



The color is purple with a conspicuous narrow median band on the division series 

 and arms, gradually fading out after the proximal third, the lateral borders of the 

 brachials, and the piimules light yellow. 



The preceding description is based on two specimens from the Aru Islands col- 

 lected by the Siboga. 



Ahtes. — Bell's original description of Antedon carpenteri, which'was based upon a 

 series of specimens from Port Curtis, is as follows: 



Centrodorsal a flattened disk; about 12 marginal cirri, of almost 20 short joints, of which the 

 lowest are almost twice as broad as the.v are long; it is not till we reach the penultimate one that we 

 see a distinct spine, though the dorsal surface of most of them is produced into a minute protuberance. 



First radials not visible; the second [IBri] do not or do only slightly touch, united to the third 

 [IBrj] by ligament. Ten arms. First brachials touch, they are nearly oblong and more than twice 

 as wide as long; the second are a httle wider on their outer than their inner side; the tlurd with a 

 syzygy; fourth to sixth oblong, seventh wider on inner than outer side, eighth wider on their outer 

 than inner, and so on alternately; twelfth and thirteenth serrated at their distal edge; the fourteenth 

 syzygial. Thence from four to seven joints between each syzygy. 130-lSO joints in the arm. 



The second pinnules on the fourth brachial are very stout, with extraordinarily wide joints, which 

 are armed on either side by spinous projections; the first pinnule is a little longer than the third. 



Colour white, with purple bands or patches, not always developed at the syzygies. The middle 

 line of the arm often white. 



Arm about 40 millim. long, disk 6 millim. in diameter, cirri less than 9 millim. long.. 



This species has some considerable resemblances to A. serripinna, from which, however, the 

 pinnules alone would, as Mr Carpenter assures me, be sufEcient to distinguish it. 



Port Curtis. 



I have e.Kamined the four specimens collected by the Alert at Port Curtis in the 

 British Museum, one of which has the arms 55 mm. long. 



The single specimen dredged by the Magneta at station XIV is according to Dr. 

 Hubert Lyman Clark, hght brown, with the arms faintly banded (distally) or striped 

 (proximally). 



The specimens from Siboga stations 273 andi274 have the arms about 50 mm. long. 



Messrs. McNeill and Livuigstone recorded two alcohohc specimens brownish 

 ochre in color from the Sir Edward Pellew Islands. One of these, now in the Australian 

 Museum, has one oral arm 75 mm. in length. 



Dr.H. L. Clark said that in the specimen from off the Northern Territory the calyx 

 is about 4 mm. in diameter and the arms are between 30 and 40mra. long. The cirri 

 are XV, 16-17. The dorsal side, including the pinnules and cirri, is very light fawn- 

 color, and the oral surface, including the inner side of the pinnules, is dark brown. 



The specimen from Holothuria Bank in 44 meters has the cirri XIV, 13-14. 



The specimen from Holothuria Bank in 71 meters is exactly like the specimens 

 from Queensland (that is, Port Curtis) in the Austrahan Museum. The cirri are XI 

 16-18. 



