A MONOGRAPH OF THE EXISTING CRINOIDS 9 



The radials are narrowly bandlike, interradiaUy somewhat bent outward by the 

 interradial stripes on the centrodorsal. The IBr, are four times as broad as long with 

 a median carination and provided both proximaUy and dually with a vertical 4-5- 

 lobed calcareous plate composed of the produced and everted ends of the ossicle. The 

 IBr 2 (axillaries) are twice as broad as long, rhomboidal, in the proximal portion with a 

 well-defined strong median tooth appearing in lateral view as a high bidentate res 

 which together with the disto-median tubercle of the IBr,, forms a strong synarthnal 

 ruberc'le The distal edge of the IBr 2 is obtusely angled with 6 or 7 pointed prominence. 

 The IIBr series are 2, similar to the IBr series but with smaller and weaker synarthnal 



^'The probably 20 arms are 65 mm. long, indistinctly flattened laterally. The first 

 six brachials are smooth, but bear both proximaUy and distafly prominent lamelli- 

 shapedtbate prominences similar to those on the ossicles of the division series. In 

 addition the most proximal brachials are partly with a median dorsal prominence which 

 mote TstaUy develops into a dorsal spine, and partly with a pair -of similar mediolateral 

 rominencs alternately most developed on the left and on the right sides. The. 

 fateml tubercles situated on both sides of the median dorsal spine disappear at the 

 fntentnt Twentieth brachials, and from this point onward only the , median dors 

 IJpine remains. The distal brachials are rather strongly compressed laterally. About 

 five of the terminal brachials have rudimentary pinnules. 



Svzygies occur between brachials 3+4, and 22 + 23; or between brachials 3+4, 

 35+36 etc with a distal intersyzygial interval of 6-11 muscular articulations. 



P is 8 mm long with 12 or 13 segments of which the first 5-7 are concave on the out- 



rounded. 



The disk is encrusted with coarse granules. 



T) ie «^ft narts are dark brown, the skeleton lighter brown. 



IBr axillary broken. . . „ v K7 K1 on_05 mm long; 



A specimen from Bock's station 56 has the arn ^™^J^ abo » 



ISA's r zi ttSttzzst £ - - - 



6 + 7/32 + 33, etc. The distal intersyzyg^ ^^^J™^^ P.* 

 p, is 7.5 mm. long with 13 segments. P s is 5 mm. ^WJi P is 3.5 mm. long 

 4 mm. long with 8 segments. P. is 3 mm. ong with 7 jjg^ft^ 

 with 8 segments. The distal pinnules are 6 mm. long 



