40 On new Crinoids from the Dutch East Indies. 



those of P. minima; the sixth or seventh and following 

 segments are about as long as broad. 



The ten arms are 40 mm. long; the lower discoidal 

 brachials are smooth, but those following have rather strongly 

 everted distal ends. 



Pi is 2"3 mm. long, with eleven segments ; it tapers rather 

 rapidly in the first tour segments, more gradually from that 

 point onward ; the first segment is short, the second slightly 

 longer, the third slightly broader than long, the fourth 

 slightly longer than broad, the fifth and following al)Out 

 twice as long as broad ; Pa is from 3'5 mm. to 4*5 mm. long, 

 with eleven segments, evenly tapering, much larger and 

 stouter than the other pinnules, though not greatly enlarged ; 

 the first segment is short, the second half again as 

 broad as long, the third slightly broader than long, the 

 following gradually increasing to the seventh, which, with 

 the following, is twice as long as broad ; the pinnule is rather 

 strongly prismatic and the fourth and following segments 

 have their distal edges produced on the prismatic angles into 

 prominent short stout spines, which increase in prominence 

 distally ; Pg is 1'5 mm. long, with eight segments, of which 

 the distal are elongated, small nnd weak ; P4 is slightly 

 smaller than P3 ; the distal pinnules are exceedingly slender, 

 4 mm. to 4*5 mm. long, with thirteen segments, of which the 

 second and third are slightly carinate and the outer are 

 greatly elongated. 



Type LocaUty. ' Siboga ' Station No. 315 ; anchorage off 

 Sail us Besar, Paternoster Islands ; up to 36 metres. 



Oligometra marginata, sp. n. 



This new species is most closely related to 0. adeonce. 



The dorsal pole of the centrodorsal is papillose. 



The cirri are XV, 15-16, 7 mm. long : the first segment 

 is short, the following gradually increasing in length, so that 

 the fourth, fifth or sixth, and following are about as long as 

 broad ; the third and following segments have a strong- 

 transverse ridge near the proximal dorsal margin ; this 

 ridge is prominent and high with a finely serrate crest ; it 

 lies about one-third of the distance between the proximal and 

 distal margins of the segments ; in the proximal half or 

 three-quarters of the cirri the distal dorsal edge of the seg- 

 ments is more or less everted, so that there is the same 

 hidentate appearance characteristic of the cirri of 0. adeonce ; 

 on the earlier segments this eversion may be nearly as high 

 as the transverse ridge, but it soon decreases in height and 



