A MONOGRAPH OF THE EXISTING CRINOIDS 191 



The locality is recorded as "Flinders, Clairmont." 



The figure is very generalized and schematic. The first brachial syzygy is shown 

 as between brachials 3 + 4, the second between brachials 11 + 12, and those succeeding 

 as regularly spaced. 



I examined Bell's type specimen in the British Museum and found it to be quite 

 a usual example of an immature multiradiata. 



Pe"ron and Lesueur's specimen from the Australian seas, which served Lamarck 

 as the type oifimbriata, is a dried example with 20 arms. I failed to see this during 

 my visit to the Paris Museum. Carpenter notes that it has a tolerably well-marked 

 median tubercle dorsally at the articulation between the IIBr, and IIBr 2 , of which 

 there is hardly any trace in the other specimens examined by him, and that the inter- 

 syzygial interval appears to be 11-14 muscular articulations. 



One of the 3 specimens from between Fremantle and Geraldton, Western Aus- 

 tralia, has 25 arms 110 mm. long; there are 8 IIBr series present, four of them 4 

 (3 + 4) and four 2; there are 6 IIIBr series, five 3 (2 + 3), and one 2; there is one 

 IVBr series of 3 (2 + 3) following a IIIBr series of 2. The cirri are XIII, 22-26, 

 from 15 to 20 mm. long. The second example has 25 arms about 100 mm. long; of 

 the 10 IIBr series 8 are 4 (3 + 4) and 2 are 2; the 5 IIIBr series are 3 (2 + 3). The 

 cirri are XVI, 20-21, 17 mm. long. The third specimen is smaller and broken, but 

 is similar to the others. 



The specimen from Dirk Hartog Island has 21 arms due to the presence of 2 

 IIIBr series, developed internally, and the absence of 1 IIBr series. The brachials 

 are of the exceedingly short discoidal type. There are VI functional cirri with 20-22 

 segments, and XIII rudimentary cirri of various lengths. The arms are 100 mm. and 

 the cirri are 15 mm. in length. 



The specimen from Mjoberg's station 1 was described by Gisle"n as follows: 



The centrodorsal is small, discoidal, 1.5 mm. in diameter, with the dorsal pole 

 concave and the margin swollen. The cirri are marginal. 



The cirri are XIII, 9-14, 6 mm. long. The first segment is short, the third- 

 fifth are about twice as long as broad, and those following decrease in length. In 

 lateral view the last 5 are broader than those preceding. The penultimate segment 

 is shortened on the dorsal edge. The fifth-eighth segments bear blunt distal knobs 

 dorsally, and the ninth-eleventh bear distinct spines which do not, however, reach 

 to more than about one-fifth the width of the segment. The terminal claw is long, 

 three-fourths of the length of the penultimate and antepenultimate segments 

 together, and is strongly curved. 



The radials are visible. The elements of the IBr series are united by a syzygy 

 which is quite as perfect as that between brachials 3+4. The IBr, are three times 

 as broad as long, and a little longer than the visible portion of the radials from which 

 they are separated by a well-marked articulation which has somewhat swollen 

 borders. Of the 6 IIBr series present, 3 are composed of 2 elements and 3 of 4. In 

 2 of the IIBr series of 2 elements these are united by synarthry, while in the third 

 they are united by syzygy. Where 4 elements are present there is either no syzygy 

 at all, in regenerating arms, or they are in 2 syzygial pairs. Of the 3 IIIBr series 

 present, 2 are 2 and 1 is 3 (2 + 3). The ossicles following each axillary are closely 

 united interiorly at their bases. 



