PART 5 



A MONOGRAPH OF THE EXISTING CRINOIDS 



539 



4mm 



FIGURE 29. Eumorphometra frasfri John, holotype: a, Lateral view of 

 centrodorsal and division series; b, ?2- E. hirsuta (P. H. Carpenter), 

 holotype :c, lateral view of calyx; </, proximal part of PI; t, P 2 without 

 gonad. 



segments and tapers to the distal end. The first segment is as long as broad, the second 

 and third are slightly longer than broad, and the fourth and fifth are about twice as 

 long as broad; the slender distal segments are longer, three or more times as long as 

 broad. The distal edges of the more distal segments are produced into strong spines. 

 The ventral side of the pinnule is thickly covered with sacculi, although there is no 

 ambulacral groove. P b is usually an oral pinnule, with 9 slender and evenly tapering 

 segments, of which the first is about as long as broad, the second is slightly longer, and 

 the remainder are elongated. The third is twice, the fourth about three times, as 

 long as broad; the fifth to ninth are about five times as long as broad. The distal 

 edges of the segments are produced into a small number of spines; the entire dorsal 

 surface of one or two of the lower segments may be rough with spines. 



On some arms P b is a genital pinnule, though P 3 is usually the first genital pinnule 

 with a large fusiform testis (the single specimen is a male) along the third to seventh 

 segments. One P 3 which is 5 mm. long with 9 segments appears to be nearly complete. 

 The first two segments are short, the remainder elongated, the fourth and following 

 being four or more times as long as broad. In the other genital pinnules the segments 

 are not so elongated. The genital pinnules extend to PI O or P 1? . In the middle 

 genital pinnules the gonad lies along the third to eighth segments. As an example, 

 P 7 is 6 mm. long, with 13 segments, of which the first two are short and the third to 

 eighth increase from two to four times as long as broad. The distal end of each segment 

 is flared out into a thorny cup around the base of the next, and the bases of each are 

 swollen to a lesser extent. The distal segments are longer, more regular, and more 

 slender. 



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