IG 



TORSTEN G1SLKN, CRINOIDS. 



do not, however, reach to more than about -/s of the breadth of the segment. Pen- 

 ultimate segment shortened on the dorsal side. Terminal claw long ( 3 /4 of the 

 penultimate and antepennltinate segment), strongly curved. 



The arms are 19; 40 mm, most of them still shorter. 



R:s plainly visible. I Br 1 and 2 united by a syzygy, which is qnite eqnal to 

 the one, for instance, between Br 3 + 4. 



The fnrther distribution of the syzygies is especially remarkable, see below. 



The I Br:s 1 united at their bases, a little broader than the visible part of the 

 R:s, from which they are separated by a well marked articulation, which has some- 

 what swollen borders. Breadth 3 times the length. II Br:s exist in 6 cases, 3 of 

 these have 2, and 3 have 4 segments. In two of the former cases both the II Br:s 

 are united by a synarthry, in the latter cases the arrangement is either 4 segments 

 without discernible syzygy (the regenerating arms 8 — 11) or 1+2, 3 + 4. 



II Br 1 and following primipostaxillar ossicles closely grown together in pairs 

 at their bases. III Br.s are found in 3 cases, in two the segments are 2, in the 

 third case these are 3! with a syzygy between the segments 2 + 3. All III Br:s are 

 fixed on an axillary, which is a II Br 4. 



First syzygy on the undivided arm is sometimes found between Brl + 2, the 

 second between Br3 + 4, the third about the 12 th segment. But in one case at least 

 (arm 4) we meet with the third Br-syzygy between Br 5 and 6. Another type shows 

 the distribution of the syzygies at the arms 1, 13 and 17, where the first syzygy is 

 found between Br3+ 4, the second one between Br6 + 7. 



The Br-segments up to and including the 5 th discoidal, to about the 8 th without 

 distal prominences, then wedge-shaped with produced distal ends, which have dentated 

 or knotty collar borders. The number of the Br-segments is 50—70. 



I give below a scheme showing the ramification of the arms and the distribu- 

 tion of the syzygies. 



u, T I?2 



i:.,i I ?2 



Br 1-2 3 + 4 5 0+7 . . . 12+13 

 Br 1-2 3 + 45 67 . . 

 Br 1-23 + 4507 . . 



II 1 — 



II 1 



TI 1-2 



\ Brl+23+45+67 



l Br 12 3 + 450 7 . 

 J Br 1-2 3 + 45 7 . 

 I Br 1-2 3 + 45 G 7 . 



11+12 . 

 11 + 12 . 



12+13 . 

 11 + 12 . 

 11 + 12 . 

 1 1 + 12 . 



II l-23?4, 



B.,1 1+2 { 

 I 



!! J I 1 



j Br 1,-2, 3, + 4, 5, 0,7, 

 I Br 1,-2, 3, + 4, 5,0, 7, 

 1 Brl,-2, 3, + 4, 5,0, 7, 

 l BrI,-2, 3,H 4,5,0,7, 

 Br I? 2 3 + 4 5 7 8 9 10+11 . . . 



III I, 



Hl 1,-2, 



II 1 ?2 3 + 4 



( Br 1-23+450+7 



I2| 13 



! Brl— 23 + 45678+9 . . . 

 Br l! 23 + 45 6 7 13+14 . 



. 12, I 13, 



. II, ! 12, 



8 

 !t 

 10 

 II 

 12 



13 



14 



1.". 



