The ("rixoids from Dr. S. Bock's Expeditiox to Japan lit 14. !»7 



Pectiuonietra A. II. Ci, \itk. 



P. flavopurpurea A. 11. Ci.akk. 



Fig. 72. 78. 



Syii.: AntcdoH discoidia [\rA\-\) 190(j Mr ('mcndo.s Bull. .VmiT. Mus. NCI. 'I'l. 

 1)|). 120, 125, 126 according to A. H. ('i.ai;k. 



Atitedon flavopurpurea 1907 A. H. <'l.u;k Proc. I'. 8. Nat. Miis. Vol. :53, p. 1:U. 



Caloiiicfra fUnopurpuri'ti 1907 A. 11. Clark Smiths. Misc. Coll. \'ol. hU, p. 363. 



Feriiiioiiictra flavopurpurea 1912 A. IT. Cl.vrk Crin. Ind. Oc, p. 188; 1915 

 Wa^-h. .Jomii. Acad. Sei. Vol. 5, p. 215: 1918 Sihoga Exp. Vol. 42 15, p. 138, 



From St. JU (o sp.). 3;") ( 1 1. ;{() (i) = 7 specimens. 



Sp. 1 (St. 36) Cd flattened, 2,2 mm., fcee doi'sal pole 1,.j mm. (". 

 XIX 21—24 (D) 25—27 (\), — 12 mm. in two whorls, aiTanged in 10 

 rows. 4"' segment a little longer than iM'oad. 5*'' and 6"' longest. L= 1' 4 

 br. then shorter again, distally L = ' 2 br. From the 7"' segment a 

 dorsal spine, compi-essed fi'om the sides and therefore crista-shaped, 

 distally shortened to a spine. Opposing spine similar to the prece- 

 ding ones, li = ' 3 of the l)r (•{ the segment. Terminal claw shorter 

 than the penultimate segment. 



R — s with a [)ointed iiiterradial prominence which separates I Br-s 1. 

 These ossicles with a medio- dorsal, slightly two-topped crista and small 

 lateral prominences which meet above the radial processes. 1 Br 1 

 h = \'3 br. I Bi- 2 h ^ ' 2 br, in the pi-oxinial half a crista continuing this 

 one on I Br 1. II Bi-s: 2. .\ims XVllI, 50 mm. H Br I basally con- 

 tiguous inside, with a lateral process on the pi'oximal outer margin. 

 A similar though indistinct one on Br 1. II Br 1 — 2 with an indistinct 

 synartrial prominence. Br 2 twice as narrow on the inside, thickened 

 on the outside to receive P,. Kxample of division of arms and distri- 

 liiilioii of syzygies: 



I Br 1—2 3:4... 13 + 14 . . 1!) 1 20 . . 25 + 26 . . 

 I i_2 I I Br 1—2 3 + 4 ... 12 I- 13 . . IS -f 19 . . 26 1 27 . . 



I Bi- 1-2 3+4... 11 + 12. . I7+IS..22: 23... 27+2S.. 32+33.. 



The segments not overlapping, distally somewhat longer than broad. 



Nova Acta Keg. Soc. Sc. Ups.. Ser. i, Vol. 5. N:o 6. Impr. 'Vs 1922. IH 



