The Ceinoids from De. S. Bock's Expedition to Japan 1014. 105 



Sp. 5 (St. 56) Cd and C. as in Sp. 4. R— s with a very high 

 and well marked tubercle. I Br 1 with a trace of a crista. Br — s 

 with a dorsal spine from about the 20"' segment. Last 7 segments 

 with rudimentary pinnules. 



Sp. 6 (St. 56) 8'^— 5«> cirral with a small dorsal spine; 6*— 10'" 

 (or 15*) segments smooth. R — s with a very small tubercle. Dorsal 

 spine from the 40"' Br. 



Sj). 7 (St. 56) A rather small specimen. The cirrus-segments 

 longer than in the preceding specimens. 2'' — 6*" cirral with both 

 a ventral and a dorsal crista, 7"' — 10"'(or 12"') segments smooth. — 

 R — s with a high prominence. I Br — s almost smooth. Example of 

 syzygies: 3 + 4, 14+15, 22 + 23, 31 + 32... Dorsal spine from the 

 35* Br. 2 — 4 segment with rudimentary p — s. — Parasitic Siylina. 



Sp. 8 (St. 59) Cd pointedly conical, h = 3 mm. Cirri with a 

 dorsal spine from 3'' — 7*(or 15"') segments, after these usually some 

 smooth cirrals. 9"' — 25"' segments longer than broad. All the distal 

 segments with spines. Opposing spine usually not longer than the 

 preceding ones. — R — s h = V s br. Arms laterally flattened out to Br 8. 

 Dorsal claw from the 60* Br. Colour red-brown. 



Sp. 9 (St. 59) More often than in Sp. 8 weak spines before the 

 opposing spine. R — s: h = Va br with a dorsal, crista. Dorsal claw from 

 the 50"' or 60"' Br, h = ',3 of the br of the segment. The L of the 

 distal pinnulars = 2 ^/2 br. 



Sp. 10 (St. 59) H of Cd 2,5 mm. No dorsal spine before the 

 20"'(— 25"') cirral. From about Br 65 a dorsal claw, h = V^ of the 

 segment. 



Sp. 11 (St. 59) R — s: br = 2 ^2 X L. Dorsal claw from about 

 Br 50, the li as in sp. 10. 



Sp. 12 (St. 59) Cd rather bluntly conical, h = 2 mm. R— s with 

 a very slight dorsal tubercle. The proximal Br — .s a little knobby. 

 Dorsal spine from the 50"'(— 60"') Br. The L of distal pinnulars 2 1/2 

 — 3 X br. 



Differs by having a somewhat lower and more rounded Cd and 

 a weaker radial tubercle. 



Sp. 13 (St. 59) H of Cd 3 mm. R— s : h = V* br with a slight 

 dorsal tubercle. Arms broken. P' syzygy in one case between Br 1 

 and 2. Fewer pinnulars on P^ (8) after II Brax. 'Disk 7 mm. 



Nova Acta Reg. Soc. Sc. Ups., Ser. 4, Vol. 5. N:o 6. Impv. ^*/s 1922. 14 



