A MONOGRAPH OF THE EXISTING CRINOIDS 685 



Gisl6n says that this is probably the young of Comissia magnifica. 



A second specimen has the cirri XIII, 12-14, from 4 to 5 mm. long. The third 

 and fourth segments are twice as long as broad. 



The 10 arms are 25 mm. long. 



P, and P2 bear combs, that on Pi consisting of 9 teeth. P^ is always and P3 is 

 usually absent. 



The disk is 2.5 mm. in diameter. The mouth is central. 



Gisl6n remarks that, like the preceding, this is probably the yoxmg of Comissia 

 magnifica. 



In a third specimen the cirri are XII, 10-11, 2.5 mm. long. The 10 arms are 15 

 mm. long. Pi is present and bears a comb. The following pinnules are absent as 

 far as the eleventh or thirteenth brachials The disk is 2.5 mm. in diameter and the 

 mouth is central. 



Gisl^n suggests that this may be the young of Comissia magnifica. 



Locality. — East of the Channel; 146 meters; August 1, 1914. 



Notes. — In one specimen the cirri are XVII, 12-15, from 6 to 7 mm. long. The 

 third and fourth segments are from half again to twice as long as broad. 



The IBri are three times as broad as long, and are free laterally. The IBr2 

 (a.xillaries) are half again as broad as long and pentagonal. The 10 arms are 30 

 mm. long. The first brachials are four times as broad as long, and the second are 

 three times as broad as long. The arm bases are smooth. The intersyzygial interval 

 is 3 muscular articulations. 



Pi bears a comb consisting of about 15 teeth; P2 bears a comb; P3 bears a comb of 

 8-11 teeth; P^ is lacking. The distal pinnules are 3.5 mm. long and are composed of 

 12-14 segments of which the last 3 bear strong dorsal hooks. 



The disk is smooth, dark brown, 3.5 mm. in diameter. The mouth is subcentral. 

 The anal tube is short. The disk is half detached, and a new one is forming beneath it. 



Gisl^n suggests that this is perhaps a young example of Comatella macnlaia or 

 of C. stelligera. 



In another specimen the cirri are XI, 8-9, 2 mm. long. The third segment is 

 the longest — three times as long as broad. The IBri is four times as broad as long. 

 The IBr2 (axillary) is twice as broad as long, triangular with the very concave distal 

 edges forming an acute distal angle. The 10 arms are 10 mm. long. The brachials 

 are everted and spiny. Pi is 2.5 mm. long and has a comb consisting of 7 teeth. 

 P2 is absent. P3 is without a comb. 



Gisl^n suggests that, like the preceding, this is perhaps a young example of 

 Comatella maculata or of C. stelligera. 



Locality. — Eastsoutheast of the Channel; 152 meters; August 16, 1914. 



Notes. — The cirri are XV, 9-12, 3.5 mm. long. The radials are four times as 

 broad as long. The IBri are three times as broad as long. The IBra (axillarics) are 

 twice as broad as long. The 10 arms are 20 mm. long. The intersyzygial interval 

 is 3 muscular articulations. The comb on Pi consists of 9 well-separated teeth. 

 P2, P3, and Ft are lacking. The disk is 2 mm. in diameter, pentagonal, and dark 

 brown. The mouth is central and the anal funnel is small. 



