A MONOGRAPH OF THE EXISTING CRINOIDS 559 



PI is from 15 to 20 mm. long. P 4 , like all the preceding pinnules, bears a comb. 

 The disk is 30 mm. in diameter. 



The cirri are about XL, 27-32, from 25 to 36 mm. long. The 38 arms are 100 + 

 mm. long. The width of the IIB^ is 4.5 mm. The interspace between the IIBr 

 series is 1.3 mm. broad. The disk is 38 mm. in diameter. The color is dark. 



The cirri are about XXX, all broken. The 38 arms are all broken. The width 

 of the IIBr! is 3.8 mm. The interspace between the IIBr series is 1 mm. broad. 

 One of the PI is lacking (see beyond, under "Abnormal specimens"). The disk is 

 30 mm. in diameter, and extends to the IIIBr a , or the third brachial of arms arising 

 from a IIBr series. 



The cirri are about XL, 26-28, from 25 to 32 mm. long. The diameter of the 

 centrodorsal at the base is 11 mm., the dorsal pole being 7 mm. across. The 40 arms 

 are all broken. The width of the IIBr! is 4.5 mm. The interspace between the IIBr 

 series is 0.8 mm. broad. 



The dorsal pole of the centrodorsal is 3.5 mm. in diameter. The cirri are XXIV, 

 19-29, from 16 to 30 mm. in length. The 23 arms are about 95 mm. long. The 

 width of the IIBri is 3 mm. The interspace between the IIBr series on adjacent rays 

 is 2 mm. broad. Combs occur as far as P 6 . The disk is 15 mm. in diameter. One 

 of the postradial series is undergoing multiplicative regeneration. It bears 2 IIBr 

 series, and 4 IIIBr series, all 4 (3 + 4). The total length is 15 mm., the undivided 

 arms being 10 mm. long and 0.7 mm. broad. P 2 , P 3 , and P 4 are rudimentary. 



The cirri are about XL, 26-32, from 25 to 38 mm. long. The 49 arms are all 

 broken. There are 9 IVBr series. On 1 ray, which is shown by Gislen as an example 

 of the arm branching in this specimen, there are 2 IIBr 4 (3 + 4) series and 4 IIIBr 

 4 (3 + 4) series; of the latter the 2 inner each bear 2 IVBr 4 (3 + 4) series. The IIBr, 

 are 5 mm. broad. The interspace between the IIBr series on adjacent rays is 1 mm. 

 broad. P D is 35 mm. long, and carries a comb consisting of 15 teeth. P 6 bears a 

 comb, like the pinnules preceding. The disk is 37 mm. in diameter. In color this 

 individual is uniformly dark brown dorsally, with the pinnules yellow and the disk 

 dark. 



The cirri have 26-34 segments, and are from 25 to 45 mm. long. The 41 arms 

 are all broken. There are 4 IVBr 4 (3 + 4) series. The disk is 30 mm. in diameter. 



The cirri have 24-31 segments, and are from 25 to 30 mm. long. The 35 arms 

 are 125 mm. long. There is a single IIIBr 2 series. The disk is 23 mm. in diameter. 

 The anal area is granulated. 



The cirri have 25-34 segments, and are from 28 to 40 mm. long. The 34 arms 

 are 130 mm. long. One of the IIBr series is 1, 2 are 2, and the remaining 6 are 4 

 (3 + 4). The IIIBr series are all 4 (3 + 4). The IIBr, are 4.5 mm. broad. The 

 interspace between the IIBr series on adjacent rays is 1.5 mm. broad. The disk is 28 

 mm. in diameter. The anal cone is 7.5 mm. broad and 5 mm. high. 



The cirri have 24-28 segments, and are from 26 to 35 mm. long. The 33 arms 

 are 100 mm. long. The disk is 18 mm. in diameter. 



The centrodorsal is discoidal, 4 mm. in basal diameter, with the free dorsal pole 

 2.5 mm. in diameter. The cirri are XXIX, 23-27, from 22 to 25 mm. in length. The 

 30 + arms are 95 mm. long. The IIBri are 2.5 mm. broad. The interspace between 



