A MONOGRAPH OF THE EXISTING CRINOIDS 325 



Geographical range. Known only from off Grenada. 

 Bathymetrical range. Known only from 479 meters. 

 Thermal range. One record, 8.33 C. 



CRINOMETRA BREVIPINNA vat. GRANULOSA (Hartlanb) 



Antedon brevipinna var. granulosa HARTLAUB, Mem. Mus. Comp. Zool., vol. 27, No. 4, 19)2, p. 323 

 (in key), p. 351 (description; Blake station 45), pi. 11, figs. 1, 2. 



Description. Hartlaub said that a specimen from Blake station 45 with an arm 

 length estimated at about 125 mm., together with a detached postradial series of similar 

 character from another individual, in their ornamentation recall the postradial series 

 of a specimen of granulifera from the same station, especially the larger of PourtaleV 

 type specimens. He said that this was especially remarkable because in this specimen, 

 in addition to the IIBr 2 series, there is one IIBr 4 series and one IIBr 3 series, in both 

 cases without syzygies. He remarked it is possible that, in spite of many deviations 

 from Pourtales' type specimen, this individual represents a transition form between 

 brevipinna and granulifera. 



The centrodorsal is subhemispherical with a flat excavated bare dorsal pole. 

 The interradial processes are well developed. The number of cirrus sockets is about 40. 



The cirri, except for a single slender one with 17 segments, are broken off. They 

 are apparently very slender, hi contrast to those of var. tuberosa. 



The radials are not visible. The IBri are very flat, bowed downward in the middle. 

 The IBr 2 (axillaries), also rather short, are rhombic; the proximal border is somewhat 

 convex, though without forming a typical posterior process, from the IBr t outward to the 

 fourth brachial on arms arising from a IBr axillary, or to the second brachial on arms 

 arising from a IIBr axillary. The IIBr series are usually 2; one is 4(3 + 4) and another 

 is 4, without a syzygy. Several ossicles are irregularly formed, or appear as if broken in 

 pieces. Of the IIIBr series, two are 2 and one is 4(3+4). On the additional postradial 

 series found with the specimen all the IIBr and IIIBr series are 2. The surface of all 

 the ossicles of the division series, as hi the case of Pourtales' type specimen of granuli- 

 fera, bears coarse and very flat granules; hi the median line there is a larger and some- 

 what higher granule, or a slightly raised median ridge. The borders of the ossicles 

 are smooth. 



There are 20 arms, of which 3 arise from IBr axillaries. As far as the fourth or 

 sixth brachials the articulations are transverse. The brachials here are discoidal, 

 broader than long. Then follow four or five bluntly wedge-shaped brachials, then 

 usually two or three somewhat longer and approximately discoidal with transverse 

 articulations, after which the brachials again become wedge-shaped, and farther out 

 more triangular. The surface of the brachials as far as the fifteenth or seventeenth is 

 also granulated, but here the granules are smaller and lower than those on the division 

 series, and on many arms are more in the form of small teeth. 



In arms arising from a IBr axillary the first syzygy is between brachials 3+4, 

 immediately followed by another between brachials 5+6. On arms arising from a 

 IIBr or IIIBr axillary the first syzygy is usually between brachials 1 + 2, the second 

 usually between brachials 3+4, the third from between brachials 6 + 7 to between 

 brachials 15+16, and the distal intersyzygial interval, so far as may be judged from 

 the few better preserved arms, is 4-16, usually 6-9, muscular articulations. 



