MONOGRAPH OF THE EXISTING CRINOIDS. 



,7. 



91 



Joint jace. The articular surface of an ossicle. 



L. 



Lappets. See Ambulacra} lappets. 



Large mature cirri. In those species of comatulids which have cirri of very different 

 lengths, the longer cirri which are situated about the periphery of the centro- 

 dorsal (see figs. 310, 311, p. 269, and pp. 250-251, 294-295). 



Larvae,. In the comatulids this term is employed to denote the young up to the 

 time of attachment, after which they are designated as pentacrinotds. 



FIG. 6.5. LATERAL VIEW OF THE PROXIMAL PORTION or \ SPECIMEN OF THOPIOMETRA MACRODISCUS FROM SOUTHERN 

 JAPAN, SHOWING THE DORSAL NERVOUS SYSTEM is PLACE (HRAWINO BY THE AUTHOR). 



Larval stem. (1) In the comatulids, the column of the stalked young (see figs. 407, 



p. 317, and 532, 533, 540, pi. 3, and p. 198). 



(2) In the pentacrinites, the primitive bourgueticrinoid column of very 



young individuals (see fig. 143, p. 205, and pp. 224-226). 

 Lateral columns. Of cirrus sockets; the two columns on the outermost borders of 



each of the five radial areas of the centrodorsal (see figs. 198, p. 237, 200, p. 



239, and 208-214, p. 241). 

 Lateral compression. Of the cirri, division series or arms; compression between 



planes including the dorsoventral axis of the animal. 



