A MONOGRAPH OF THE EXISTING CRINOIDS 121 



in the specimens from Fiji are a little shorter in proportion to the arm length than in 

 other specimens of perspinosa (up to 39 mm. with 60 segments, arm length up to 170 

 mm., as against 43-50 mm. with 53-63 segments and arm length 150 mm.), but Gisl^n 

 rightly considered this difference unimportant. As seen from the descriptions, P, 

 and Pa are a little variable in relative length, though P3 is generally the longer. ' 



The specimen from Port Denison was described as a new species, Antedon loveni, 

 by Prof. F. Jeffrey Bell m the following terms: 



Centrodorsal large, as large as the disk, excavated in the centre, with about 20 cirrus-sockets 

 (cirri lost). 



First radials just visible, second [IBr,] oblong with a convex median protuberance along their 

 distal edge; axillary [IBrj] pentagonal, not a syzygy. Ton arms. First brachials wider without 

 than within, in contact, with a convex median protuberance along their distal edge; the second with 

 sides a httle more regular; the tliird almost square, a syzygy. The fourth to soventJi joints a little 

 wider than long; eighth or ninth a syzygy. The succeding joints wedge-shaped, with their free 

 margins a little overlapping and slightly toothed. About 5-8 joints between the succeeding syzygies. 

 The earlier pinnules are extraordinarily stiff; the first, which is on the second brachial, is much 

 shorter than the second or third, which are of about the same length and made up of rather less than 

 20 joints, most of which are longer than wide, and have their distal edge enlarged and slightly den- 

 ticulated. There are 10 or 12 stiff pinnules; the succeeding ones are shorter, and then again longer. 

 Arms more than 120 millim. long; disk not more than 7 millim. in diameter. The radials and 

 the earher brachials have their infero-lateral edge produced into a kind of ledge. The more proxi- 

 mal joints have the appearance of being tuberculated, and there is a faint median dorsal ridge; at 

 the sides they are compressed. 

 Colour, dark slate. 



The stiff pinnules, the long arms, and the small disk are very striking characters in this species. 



For figures of this species Bell refers to plate X, figs. A, a-e. The reference 



should have been to figs. C, a-e. On plate X there are two figures lettered B, but 



none lettered C. The figure at the top of the plate lettered B should have been 



marked C. 



Carpenter noted (1888) the absence of P, in the unique specimen of Antedon 

 loveni, remarking that this seems to have escaped Bell's notice, for he made no mention 

 of it. He said farther that Bell's figure is also incorrect, for the pinnules of the second, 

 fourth, and sixth brachials (P,, P,, and P3) are represented as being placed on th 

 inner mstead of on the outer side of the arm. A similar error occ^urs in the figure of 

 Antedon pumila {= Compsometra loveni) on the same plate, in which the first, second, 

 fourth, and sixth, etc., brachials are all represented as bearing pimiules on the inner 

 side of the arm, an arrangement which never occurs in any crinoid. 



The specimen from Binongko has the arms 150 mm. long. The cirri are 40-t3 

 mm. long with 50-54 segments. 



The specimen from Ternate has the arms 170 nun. long. The cirri are 50 mm. 

 long with 48-53 segments of which the longest are slightly longer than broad. P3 is 

 about as long as P2. 



In the specimen from Amboina the cirri are XII, 56-65, exactly resembling those 

 of the type specimen from Jobi. Indeed, the whole animal most closely resembles 

 that from Jobi. 



The specimen from Banda has the arms 130 mm. long and the cirri X (with some 

 rudimentary), 56-63, from 45 to 50 mm. long. The color is black tmged with violet. 



724008 — 47 9 



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