:J2 torstbn gislkn, CRINOIDS. 



Specimen 14 (Stat. 13): C XXX (I small one). T: 19 (B 4 A 8), 24 (B 8 All). 

 I — E: 28 (B 3 A 8; the 6 outermost segments smooth). E: 2"). 



Pi 14-16; P 2 15 (11 mm); P 4 14. P a 15; P k 25. 



Specimen 15 (Stat. 13): CXXVI1I (I small). T: 20 (B 5 A 9), 21 (B 4 A 8), 

 21 (B 5 A 15, only slightly developed). E: 23, 25. 



P a 20 (15 mm); P 2 19 (14 mm); P, 17 (12,5 mm); P 4 18. (10,5 mm); P, 21 (12,6 

 mm). - P, 19-21 (15 mm); P,, 16 (12.5 mm); P c 16 (11 mm). 



The conclusion to be drawn from these figures is that the number of cirri and 

 cirrals, the length of proximal pinnules and the number of their segments are all 

 quantities with rather great variability. It is pretty certain that they vary at dif- 

 ferent ages and that the figures of variability would have been still larger if the 

 accesible specimens had been more unequal in size. 



The number of C:i varies between XIX and XXXV. 



As to their distribution on Cd we can distinguish more or less distmctly two 

 categories: an inner dorsal row, which has as a rule a lower number of segments, an 

 exteriör ventral one with a higher number. (Probably a usual phenomenon. Com- 

 pare also the figures I have given for the number of cirrals in Am/phimeira milberti 

 and Zygometva microdiscus var. elegans.) This is evidently connected with the fact that 

 the animal is still growing, and also that new C:i are formed at the R:s on the 

 Cd börder. In the exteriör row the younger C:i are therefore to be found, and if 

 it is true that the number of the segments increases during the growth of the animal, 

 it is easily explainable that older C:i (in the interiör row) ought to have fewer, 

 younger C: i (in the exteriör row) more segments. 



Though the proximal P:s vary both in length and in number of segments, the 

 mutual relation of length between Pj, P 2 and P 3 in the above described cases is 

 nevertheless uniform. The number of pinnulars in Pj varies between 13 (sp. 9) and 20 

 (spp. 13, 15), and the length of the pinnula between 10 and 15 mm. * The figures 

 in P 2 are 13 (sp. 7) and 19 (sp. 15), 9 — 14 mm resp. In P 3 the length decreases 

 and the number of segments usually also (except, for instance, specimen 1 and 9). 

 In the following P:s the length does not increase at all, or, in any case, only very 

 slowiy, but the number of segments rises quickly to the number of pinnulars (20 — 25) 

 in distal pinnules by the abbreviation of the segments. The appearance and dimen- 

 sions of corresponding segments are rather similar in the specimens described. In 

 this connection, however, I wish to call attention to the presence of distinct, though 

 small, distal prominences on the segments in P b in specimen 12. I wish also to laj T stress 

 upon the fact that the specimens examined are of about the same size and therefore 

 one is not sure that younger specimens will not show different proportions. 



A. H. Clark in his description of the Crinoids of the British Museum (1913) 

 has, becausc of this species, proposed a new genus Oligomeirides. The only statemen t 

 concerning the characterizing of the genus that he has given, is, as far as I have 

 ascertained, to be found in op. cit. 42, p. 302, where the genus is said to have 

 double dorsal prominences on the cirrals. Here I have kept the species in the old 



