MONOGRAPH OF THE EXISTING CBINOIDS. 



91 



Joint jace. — The articular surface of an ossicle. 



Lappets. — See Amhulacral lappets. 



Large mature a.m.— In those species of comatiilids which have cirri of very different 

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

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



Larvse.—ln the comatulids this term is employed to denote the young up to the 

 time of attachment, after wliich they are designated as pentacrinoids. 



FIG 60-LATEEAL VIEW OF THE PROXMAL PORT.OK OF A SPECIMEK OF TBOP.OMETRA MACRODBCUS FROM SOUTHERN 

 FlO. 6o. LATERAL ™^^ ^^^^^ ^^^ ^^^^^ ^^^^^^ ^^.^^^^ ^ ^^^^^ (BRAWQ BV THE AUTHOR). 



Larval stem.-{l) 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 bourgueticrmoid column of vers- 

 youngindividuals(seefig. 143, p. 205, and pp. 224-226). 



Lateral columns.^Oi cirrus sockets; the two columns on the «"f7°«t borders of 

 each of the five radial areas of the centrodorsal (see figs. 198, p. 237, 2UU, p. 



239, and 208-214, p. 241). ■ , . „ 



Lateral compression.-Oi the chri, division series or arms; compression between 

 planes including the dorsoventral axis of the anunal. 



