The CRixoins from I)k. S. Bock's Expedition to Japax lit 1 4. s;{ 



I 1^2 



III 



H 1—2 H-4 :> (i 7 



II I 



iBi- 1—2 ;} + 4 7 

 Br 1—2 3 + 4 5 7 

 Br 1—2 :{-4 :> 7 . . . 



I lii- 1—2 3^ 4 :> (i 7 



•> 



" Bi' 1-2 ;{+ 4 .") (i ■ 



III 



^ .S>). 2 (St. oO) Free dorsal pole ol Cd 2 mm. ('. XXV 25 — 31; 

 1.) — 20 mm. I'sually a single dorsal spine from the 16"' segment. The 

 middle prominence largei- on the proximal segments. 



R — s projecting in the corners. 1 Br 1 h = ^4 br. The di\ision- 

 series of rather uniform thickness. Arms \\{ (possibly two morel, bro- 

 ken. II and III Br— s : 2. 



P, 14 — 10: ."),.-, — (i nnii. (missing in cases comparable with Ihose 

 in the above-quoted scheme). All the ossicles after Br 3 broken. 

 Disk thrown off. Colour: light brown. 



Sp. 3 (S(. 581 A young specimen, like the following one. C. 

 XR' 9: 2 nun. No dorsal spine, the ends of the cirrals somewhat swol- 

 len, (tjiposiiig sj)ine h = \-> of the br of the segment. Terminal claw 

 a little longer tliiin the pi'cceding segment. Cirral 8 and 4 L 2 br. 



R— s h ' _■ br. 1 Bi- 1 h br. Axillary h = 1 ^2 bi'. forming a 

 slight synarthrial tnlpci<-lc willi the preceding ossicle. Arms X. 13 nun. 



P, 101: I.-, mm. P.,- P:^ wanting. Disk not incised, 1,.! nun. 

 ^ Sj). 4 (St. 53) (". X\l !)— II. in a single or partly double whorl. 



Ai'uis Xlll. 15 mm. , . II Br-s:2. Syzygies with an infei'val 

 of 4 — 5 ol)lique articnlations. The segment very nuich hour-glass- 

 shaped. 



P, 14: 3... mm.. P._, 13: 2.:. mm. Disk incised, dark-red. 



The young of this geiuis seem to June longer proximal bi'achials 

 (I Br I and 2 especially longer) than other young forms I have exa- 

 mined. 



The cin-j in s|). I somewhat resemble ('. lymvi-n and so there 

 might he some doubt whethei' the two s])ccics ai'e distinguishable (Sp. 

 1 corresponds in all (he otbei' chai-aclcristics with sp. 2. which is a 

 younger indi\idual of (be same (\pe. Imt wilii pimiounced (lUn^imr- 



