170 T. GisLÉN, 



3 + 4, 7 -f 8 : 1 case) 3 cases; 13— IS mm. IV Br-s 17 (3 ^ 4) 1 case, 18 

 (3 + 4) 1 case, 23 (3 + 4, 13 + 14, 20 + 21) 1 case; 15— 20 mm. Arms 

 on a perfect specimen probably + XLV; total L 11') mm. Unl)ranched 

 part of the arm 80 mm. Syzygies with an intcrxal of — 12 obli(|UC 

 articulations. The Br segments after II Brax with somewhat overlap- 

 ping distal margins. 



Pi (to the right on 1 Br 2 in 5 cases) 20; 16 mm., [l^ (on 1 Br 

 3) 10; 13 mm.] Pg 19; 14 mm. Br-p. 14; 6—7 mm. 



Sp. 13. (St. 56) 4 nodal joints without cirri. Full number of 

 internodals in the 4*-'' internode. Interarticular pores to the 7"' inter- 

 node. The distal face of the nodal joint pentagonally rounded. 



Cirri 29 (V) 27 (VI) 28 (VII); 21—22 mm. 4«' segment L = br, 

 5th — gth segments L = P/s br. Cirri extending over 1^/2 — 2 internodes. 



B — s 0,6 X 1,0 mm. soldered together laterally. R — s 1 X 2 mm. 

 a little bent outwards, thus forming an angle with the basais. I Br — s 

 7 (1+2, 4 + 5); 8 mm. in the 3 perfect radii. II Br— s 11 (3 + 4) 2 

 cases, 13 (3 + 4) 1 case, 14 (3 + 4) 1 case; 10 — 11 mm.; the other 

 ones broken. Ill Br— s 13 (3 + 4) 3 cases, 15 (3 + 4) 1 case, 19 (3 + 4) 

 2 cases, 20 (3 + 4, 16 + 17) 2 cases; 9—14 mm. IV Br— s 18 (3 + 4, 

 13+14:1; 3 + 4, 14 + 15 : 1; 3 + 4, 16 + 17 : 1) 3 cases. All new 

 arms on the inside of IV Brax reinforced p — s, very small with 5 — 

 segments, 2 mm. The outer arms = the original arms: 12 mm. 



Arms in the complete specimen probably XLV, total L 55 mm.; 

 12 mm. with rudimentary p — s. The small, new arms appear on the 

 border to the rudimentary pinnules. (The preceding pinnule of the 

 original arm with 7, the succeeding one with 3, and the ones that 

 then follow with 2 segments; the young arm itself with — 7 segments). 

 These new arms differ from the other adjacent p — s by the distal 

 spinosity and by supporting one oi" two small p — s with 2 — 3 segments; 

 The syzygy between Br 3 and 4 is usually developed. 



Pj (to the right on I Br 2 in 5 cases) 9; mm. Br-p. 9; 5,5 

 mm. Example of arm-branching: 



