A MONOGRAPH OF THE EXISTING CRINOIDS 



79 



complete) are broken. The breadth of the proximal portion of the arms is 1.7 mm. 

 The intersyzygial interval is from 4 to 11 muscular articulations. P, is 8.2 mm ong 

 withTs segments. P 2 is 5.8 mm. long with 14 segments. P 3 is 4.8 mm. long with 1 1 

 segments P 7 is 3.8 mm. long with 9 segments. 



(5) The 13 arms have full-grown regenerates of brighter color than the proximal 

 nortions This specimen was attached to a sponge. 



P (6) The cirri are in 14 columns. They are XV, about 20, about 12 mm. long. 

 The 12 arms are 60 mm. long. P, is about 5 mm. long with 14 segments P 3 is 2 4 

 mm lont vith 8 segments. The distal pinnules are 4.5 mm. long with 12 segments. 

 The diskhas coarse granules along the ambulacral furrows. 



(7) The diameter of the centrodorsal is 3.2 mm. The cirri are X\ , 21 about 13 

 mm. long. The 18 arms are all broken. The disk is 6.5 mm. in diameter and is plated 



Wit \rTLTriai in 15 columns and are XV, 21-22. The 13 ; + arms (on three post 

 radial series 3, 3, 3) are 65 mm. long. P, is 6 mm long with 16 segments. P 2 is 3.3 

 mm long with 9 segments. P 4 is 2.8 mm. long with 6 segments. 



9) The cirri are XV, about 20. The 15 arms are 55 mm. long. P, is 6 mm. long 

 with Jo segments. P 2 is 3 mm. long with 9 segments. The distal pinnules are 5 mm. 



l0ng ^TL S Tamet of the centrodorsal is 2.8 mm. The cirri are XIV 20^ 

 The arms are at least 13, 60 mm. long. The diameter of the disk is 4.8 mm. This 



is a 6-rayed ^«^JJJv imens are dried; they have 11 and 12 arms. 



GillS said it seemed to him that with the present limitation of the genera withm 

 the Charitometridae one must refer this species (mortensem) tc .Monachometra. The 

 only spees Previously referred to this genus, M. fragile, differs sharply rom M. 

 ZLZni He noted I had informed him that the opposing spine * double mM 

 «n in Diodontometra. From this genus it is distinguished by the totally 

 Se^t appearance of the centrodorsal. ^k^ra^sen, te* sm^ 



wh^aTin M. fra^s ^S^S^^^ 



iT^'LL otM.Uilis which has permitted dtreet compar.soo; ,t has 20 «... 

 130 Sensed that the two species of the genus "^"^g^i 



is still not completely satisfactory. 



