356 Vei-non L. Kellogg. 



arm torn off at some distance from the disc, just beginning to re- 

 generate. The cut end has "calloused" over, apparently by the 

 inbending of the edges of the body wall, but in the center is left 

 a small opening (serving as mouth ?). No protuberance indi- 

 cating new disc or arms has yet appeared. The arm segment, 

 which is regenerating at both ends, shown in Figure 5, is of an- 

 other species of Linckia, probably pacijica, and had an obliquely 

 cut surface at the proximal end, and the two outer arms of the four 

 regenerating ones, that is, those nearest the parent arm, are about 

 twice as well developed (as far as size goes) as the other two. 

 No madreporite is yet developed on the new discal portion. The 

 specimen illustrated in Figure i is regenerating but three new 

 arms instead of the normally missing four. In all the specimens 

 illustrated by Figures i, 2, 3, 4 and 5 the arms were undoubtedly 

 broken off without any part of the disc attached. 



