88 
appendages. The most distal segment bears on its distal face a 
synarthry, the stem is therefore evidently not complete, but to judge 
from other signs (the knobby apparance of the distal stem-part) the 
broken, most distal stem-part cannot have comprised many segments. 
BB pentagonal, h. and br. about equal, O.9 mm, united to each 
other by close sutures. 
RR h: 1.3 mm, distal diameter I.9 mm, the distal border sligthly 
concave. With the BB forming a smooth cup in which the separate 
ossicles are connected by close, though very distinet, sutures. 
Arms V, broken at the tips, preserved part of longest arm 41 
mm. with 63 Brr. (Calyx -|- arms 44 mm. here). Lateral horders 
of the proximal Brr in close apposition as far as Br 8 and provided 
with Sharp lateral edges. Nothing of the disk visible to external 
view when the arms are in situ and folded up over it. Br segments 
smooth, with a very weak longitudinal rifling of the dorsal surface, 
discernible only at high magnification. Besides there oceurs an 
indistinet and weak granulation of the dorso-lateral horders of the 
proximal Br ossicles from Br 3 to about Br 8. Non-muscular articular 
facets with a dorsal ligament pit and two large lateral fossæ just as 
in a young syzygy when the First 2 septa are formed (cf. Echinoderm 
studies, p. 76). These connections regularly alternate with the 
muscular articulations; few exceptions in the outer parts of the arms. 
All Br segments shorter than broad. Thickest part of the crown about 
Br 10, the diameter here being 4.8 mm. Example of distribution of 
syzygies and of occurence of pinnules in the proximal arm-part: 
Br 1+2 3+4 5+6 7+8 9+1+ 11 + 12 . . . 
In distal arm-parts e. g. : 
. . . 21+^ 23 24+^ 26+27 28 29+30 31+"^ 33+34 
35+36 37 38+39 . . . 
The first pinnule oceurs in 4 cases out of 5 to the right on 
Br 8, in one case to the left on Br 10. Thus the first suppressed 
pinnule must in all five cases have oceurred to the left on Br 2. 
The most proximal pinnules slightly angular proximally. First two 
segments about squarish, following longer than broad, L=:2—3Xbr, 
distal segments rather distinetly swollen at the articulations. Two 
proximal pinnules (on Br 12 and 14) with about 13 segments, 7 mm. 
The articulations between the Br and the first pinnular and between 
the first 2 pinnulars is a normal muscular articulation as usual. 
