. Bulletin - United States National Museum. Science. 526 BULLETIN 82, UNITED STATES NATIONAL MUSEUM Tlie great variability among the specimens called inusituta which I have examined suggests that they are immature and do not represent a distinct species themselves. At Investigator station 13 and at Siboga stations 38 and 45 inusitata was associated with mira. At Siboga stations 178, 314, and 316 inusitata was found alone. The occurrence with mira suggests a relationship between the two, since nowhere are two species of this, or of any of the related genera, ever found together. The occun-ence
. Bulletin - United States National Museum. Science. 526 BULLETIN 82, UNITED STATES NATIONAL MUSEUM Tlie great variability among the specimens called inusituta which I have examined suggests that they are immature and do not represent a distinct species themselves. At Investigator station 13 and at Siboga stations 38 and 45 inusitata was associated with mira. At Siboga stations 178, 314, and 316 inusitata was found alone. The occurrence with mira suggests a relationship between the two, since nowhere are two species of this, or of any of the related genera, ever found together. The occun-ence alone at 3 stations very likely means that the larger individuals, which in most of the Antedonidae are much more brittle than the young, were so fragmented that they were not considered worth preserving. I can find no tangible differences between Gislen's Ps. wireni and this species as represented by inusitata. PSATHVROMETKA MINIMA (A. H. Clark) Figure 26 Psathyrometra minima A. H. Clark, Notes Leyden Mus., vol. 34, 1912, p. 141 (description; Siboga sta. 48); Die Crinolden der Antarktis, 1915, p. 116 (range); Unstalked crinoids of the Siboga- Exped., 1918, p. viii (discovery by the Siboga and its significance), p. 226 (in key; range), p. 228 (description; sta. 48), p. 271 (listed), pi. 26, fig. 91. Psathyrometra minimus , Die Crinolden der Antarktis, 1915, p. 117 (comparison with Ps. antarctica). Diagnostic features.—The single known specimen has the centrodorsal mm. in basal diameter and mm. in vertical height, with 4 or 5 cutus sockets in each radial area in two irregular columns; interradially there is a flat or slightly grooved space between the columns; the arms, cirri and pinnules are unknown. Description [bj' ].-—The centrodorsal is conical with the sides fairly straight. Figure -Psathyrometra minima A. H. Clark, Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
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