The Crinoids from Dr. S. Bock's Expedition to Japan 1914. 75 



Example of the distribution of the distal syzygies (from arm 8, 

 in the above-quoted example) . . 30 + 31 . . . 41 + 42 . . . . 52 + 58 . . . 

 05 + 0(5 . . . 78 + 70 . . 90 + 91 . . 101 + 102 . . . 109 + 110.. Distal seg- 

 ments discoidal, short, L— '2 — '/3 br. Lateral profile rather smooth. 

 17 — 18 segments per cm. (Ki, if the syzygial pairs are counted as units). 

 The arms are very close to one another (interspaces chiefly between 

 I Br 2 — Br 4 on the outer side of the divisions). 



I'l (9^-)18— 21; (4— )11 mm. (the 4"' and the following segments 

 slender, L = 1*2 — 2 br, like the segments of following pinnules smooth), 

 P2 19 — 25; 11 — IS mm.. P3 17 — 20; 14—10 mm. (in a single case only 

 8; 4 mm., is a young regenerate), P^ 14 — 10; 10 — 13 mm., Pg 14; 6,5 

 nun. Distal p. +20; 8,5 — 10,5 mm. (The L of the segments = 2 X br). 



Disk strongly incised, smallest diameter 5, largest 7 mm. The 

 soft parts do not cover the whole ventral surface of the di\'ision-series. 

 Colour: violet with lighter and darker transverse bands on the arms. 



,S/;. 2 (St. 47) C. XXIII (11— )14-17; (3,5— )5,5— 7 mm. 5"'-7* 

 segments longest, L=1V2 br. No dorsal spines; the segments are, 

 however, laterally compressed, forming a very weak carina. Opposing 

 spine: h = Vs — ^ji of the br of the segment. 



R— s as before. I Br 1 h = ^s br, with slight, lateral prominen- 

 ces. I Brax h = ^/4 br, almost 0-angular by the backward directed 

 median synarthrial tubercle. Arms X, 27 mm. Br 1 united inside, V2 

 as wide outside with a convex outer margin (= an indistinct lateral 

 prominence). P* syzygy between Br 3 and 4 distally with an interval 

 of 5 — 7 oblique articulations. The Br-segments smooth. 



Pj 13 — 15; 4,5 — 5,5 mm. (Longest segments: L = 2i/2 br), Po 13; 

 5 mm. (Segments to 3 X br), P3 10; 3 mm., P^ 9; 2 to 3 mm.- Then lon- 

 ger p-s again. Distal p. 15; 4,5 mm. 



Disk incised 2,5 — 4 mm., whitish. Otherwise the animal is red- 

 brown. 



The specimen described last might perhaps, because of the 

 short 3'' pinnula, be a young of Lamprometra protedus. It is, however, 

 to be noticed that it is not until a rather advanced stage that the 

 young forms obtain the relation between the lengths of the proximal 

 pinnules which is peculiar to the full-grown species. For P^ is first 

 formed, then P,, and finally P3. The above-mentioned shortness of 

 P3 might therefoi'e be ascribed to the youth of the animal. 



