330 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



ends of the ossicles as a rule are not spiny. A saddle-shaped concavity of the dorsal 

 surface is nowhere present. 



Hartlaub said that this specimen shows a transition to the one from Martinique. 

 The feature of the spiny edges, which in the specimen from Blake station 45 is only to 

 be noticed in traces here and there, is so much further developed in the Martinique 

 specimen that it totally alters the general appearance. This Martinique specimen is 

 herein regarded as belonging to var. gemmata. (see page 318). 



In the larger specimen from Blake station 34 Hartlaub counted seven IIIBr series, 

 but apparently more were originally present. The number of arms he estimated as at 

 least 30. The radials are only slightly visible in the interradial angles. Of the IIBr 

 series, one is 2 and one is 4(3 + 4). 



The smaller specimen from Blake station 34 had apparently about 20 arms. Two 

 of the IIBr series are 2. There are no IIIBr series. The radials are wholly visible. 

 P D is predominantly flattened laterally. The cirri are strikingly short. 



The best specimens, according to Hartlaub, were two from off Martinique col- 

 lected by Captain Cole apparently when on the cable repair ship Investigator. They 

 far exceed those from Blake stations 45 and 34 previously described, and because of 

 the relatively good state of preservation of their arms permit of a fairly close estimate 

 of the arm length. So different are they that they show in its highest development 

 each feature of the ornamentation which in the others, perhaps because of then- younger 

 age, is only indicated. The second of these specimens is described under var. gemmata 

 (see page 319). 



The first specimen from Martinique, according to Hartlaub, shows a striking 

 similarity to Charitometra basicurva in the ornamentation of the lower brachials. These 

 ossicles are strongly saddle-shaped, and their greatly produced edges are beset with 

 sharp, stout, and erect spines. The characteristic granulation which appears on the 

 surface of the division series in the first described specimen from Blake station 45 is 

 here entirely lacking. 



There are 21 arms about 140 mm. long. One of the IIBr series is 2. The arms 

 have syzygies between brachials 1+2 and also between brachials 3+4. One IIIBr 2 

 series follows a IIBr 4(3+4) series, developed internally. 



The radials are slightly visible here and there. The IBri are short; their proximal 

 border is rather strongly convex and laterally somewhat notched. Such notches, 

 interrupted by small convexities, were found more extensively in the two specimens 

 from Blake station 157 determined as Antedon angusticalyx by Hartlaub (=var. angusta, 

 page 335). The lateral borders of the IBri are somewhat broadened, this broadening 

 resulting in part from an incision, often very strong, by the IBr axillary. A quite 

 similar relationship exists between the IIBi'i and IIBr 2 . 



The small pinnules of the ninth-eleventh brachials, which are about 5 mm. long, 

 show a very marked broadening of the third-fifth segments, especially of the fourth. 

 The lowest pinnules are not visible because of the very close apposition of the arm bases. 



This specimen is the stoutest of all those seen by Hartlaub, and the estimate of 

 an expanse of 380 mm. (an arm length of 190 mm.) is certainly not too high. 



Another specimen from Martinique was apparently utilized by Carpenter for a 

 preparation of the calyx. The five radials, separated from the calyx, are fairly well 

 preserved. 



