A MONOGRAPH OF THE EXISTING CRINOIDS 335 



the IIBr series, developed interiorly in 1,2,2,1 order. The division series are perfectly 

 smooth dorsally and are in close apposition all around the calyx ; the edges of the com- 

 ponent elements are slightly prominent, and the axillaries have a slight broadly rounded 

 median ridge, most pronounced on the first. One specimen has one IIBr series and one 

 IIIBr series 4(3+4). 



The 30 arms are 150 mm. long and resemble, except in ornamentation, those of 

 related forms. After the third or fourth the brachials develop strongly overlapping 

 distal ends the middle of which is swollen into a broad tubercle which may extend 

 proximally to the lower edge. This feature disappears after about the thirtieth brachial. 



P t is 11 mm. long with 30 segments, evenly tapering and becoming slender and 

 flagellate distally; the basal segments are about four times as broad as long, the outer 

 about as long as broad. P 2 is of the same length as Pi and similar to it, but slightly 

 more slender. P 3 is 9 mm. long and similar to P 2 . P 4 is 9 mm. long, very slightly 

 stouter b as ally than P 3 . The pinnules following become gradually shorter with fewer 

 segments of which the basal become gradually more expanded. P 8 is 7 mm. long with 

 15 segments of which the third, fourth, and fifth are much broadened and the sixth is 

 trapezoidal, the pinnule from this point onward being slender with the segments about 

 twice as long as broad. The pinnules following gradually decrease in length, P 18 being 

 4 mm. long with about 12 segments of which the third-fifth are broadened and those 

 following are somewhat longer than broad. From this point onward the pinnules 

 gradually lose the expansion of the proximal segments and very slowly become more 

 slender and increase in length. The distal pinnules are 7 mm. long. The gonads 

 first appear on P 6 and rapidly increase in size, becoming large and semicircular in pro- 

 file, laterally compressed, protected by the expansion of the pinnule segments and 

 ventrally by the development of a pavement of perisomic plates. They disappear at 

 about the end of the proximal third of the arms. 



The disk is completely covered by a pavement of very small granular plates. Side 

 and covering plates are strongly developed along the ambulacral grooves. 



The color in alcohol is yellowish white, the division series and arm bases as far 

 as the second brachials dark brown. 



Localities.— Albatross stations 2154, 2319-2350; Caroline station 43; Atlantis 

 station 3326. 



Geographical range. — From northern Cuba to Puerto Rico. 



Bathymetrical range— From 484 (?439) to 567 meters. 



Thermal range. — One record, 15.33° C. 



Remarks.— Br. H. L. Clark wrote that a small comatulid 10 mm. through the calyx 

 with arms about 90-100 mm. long dredged by the Atlantis at station 3326 looks like a 

 young Crinometra, but is clearly neither granulijera nor insculpta. He said that I had 

 identified it for him as a young specimen of pulchra. 



CRINOMETRA BREVIPINNA var. ANGl'STA. Tar. nov. 



Antedon angusticalyx (not of P. H. Carpenter, 1888) Hartlaob, Mem. Mus. Comp. Zool., vol. 27, 

 No. 4, 1912, p. 287 (description of two specimens from Blake station 157), pi. 4, figs. 3, 4, pi. 12, 

 fig. 9,' pi. 13, fig. 2. 



Description— The larger specimen from Blake station 157 described by Hartlaub 

 under the name of Antedon angusticalyx has the centrodorsal dome-shaped with strongly 

 developed interradial ridges and processes. The bare dorsal pole bears a few spines. 



