The Crixoids from Dr. S. Bock's Expedition to Japax 1914. 97 



Pectinometra A. 11. Clakk. 

 P. flavopurpurea A. H. Clauic. 



Fig. 72. 73. 



Syn.: Äntcdon discoidca (part) 1906 Mc Clendon Bull. Aiiut. Mus. \'i)I. 22, 

 pp. 120, 125, 126 according (.o A. H. Clakk. 



Aiitedon flavopurpurea 1907 A. H. Clark Proc. U. S. Nut. Mus. Vol. 33, p. 134. 



Cdloinctra flaropurjyurea 1907 A. H. Clark Smiths. Misc. Coil. Vol. 50, p. 363. 



Pectùtomctrtt flaropiirpnrea 1912 A. H. Clark Crin. Ind. Oc, p. 188; 1915 

 Wash. Journ. Acad. Sei Vol. 5, p. 215; 191S Sihuga Exp. Vol. 42 B, p. 138. 



From St 34 (5 sp.j, 35 (1), 36 (I) = 7 specimens. 



Sp. 1 (St. 36) Cd flattened, 2,2 mm.. IVee dorsal pole 1,.-. mm. C. 

 XIX 21-24 (D) 25—27 (\), 9-12 mm, in two whorls, arranged in 10 

 rows. 4"' segment a little longer than broad. 5*'* and 6"' longest, L= IV4 

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

 dorsal spine, compressed from the sides and therefore crista-shaped, 

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

 ding ones, h = ^3 of the br of the segment. Terminal claw shorter 

 than the penidfimate segment. 



R — s with a pointed interradial prominence which separates I Br-s 1. 

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

 lateral pi'ominences which meet above the radial processes. 1 Br 1 

 h = V3 br. I Br 2 h-' 2 br, in the proximal half a crista continuing this 

 one on I Br 1. II Br-s: 2. Arms X\'III, 50 mm. II Br 1 basally con- 

 tiguous inside, with a lateral process on the proximal 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 (0 receive Pj. Example of division of arms and distri- 

 bution of syzygies: 



I 1—2 



II 1—2 



Br 1 — 2 3 + 4 . . . 13 + 14 . . 19 + 20 . . 25 + 26 . . 

 I Br 1—2 3 + 4... 12+ 13.. 18 4- 19.. 26 + 27.. 

 Br 1-2 3+4 . . . 11+12 . . 17+ 18 . . 22+23 . . . 27+28. .32+33. 



The segments not overlapping, distally somewhat longer than broad. 



Nova Acta Reg. Soc. Sc. Ups., Ser. 4, Vol. .5. N:o G. Impr. '''a 1922. 13 



