The Crixoids from Dr. S. Bock's Kxpeditfon to Japax 1!»I4. 1 / 



Disk S mm. Anal i'limu'l I.r. mm. Mdiitli and anus subceutral. 

 Colour dark brown, regenei-ak'd ]uirts white. 



Sp. 2 (St. 59) (Vl. 3 mm., pentagonal, flat dorsal pole 2 mm. 



r. XX\' IT)— li); 9 — 11 mm. The 4"' — 5"' segments are the long- 

 est L = 1 'V"* br. 0^'' segment a little shorter, a ti-ansition segment. 

 After this (as in sp. I) highly polished segments. 



The arms are XIll. 5.") mm. Syzygies with an interval of 4 — ('» 

 oblique articulations. 



Pi 38 (19— 22T) !l nun.. P, 30 \-r IST| 7,5 mm., P, 17; 4.., mm. 

 and Pg 15: 4 mm. \\ithout combs, but with doi'sal hooks and as in the 

 preceding p. with small spiny knobs on the outer side of the proximal 

 segments. Distal p. 19; (! nun. The (5 last segments with doi'sal hooks. 

 The segments somewhat longer than broad, witli spiny boi-ders. — ■ 

 Disk (),5 mm. 



Sp. 3 (St. 53)- C. XXIII 15— 1(> (D|. 17—18 (\'), 7—9 mm. The 4"' 

 and 5''' segments longest, L = 2 X br. L^rom the 5"' segment a dorsal 

 transverse crista. 



The arms X. 4<> nnn. +. Syzygies with an interval of 5 to (i 

 oblique joints. Axillaiy h = '2 br. I Br 1 h = '0 l)r. Primijtostaxil- 

 laries free inside. 



P,— P4 with a comb. P, 30 (IS T| 5 nnn.. P., + 13 T, a little shorter. 

 P3 and Pj with still shorter combs, P-, II: 3 mm. Distal p. 13: 5 nnn. 



Disk 5 mm. Mouth subcentral. 



The base of the arms toleral)ly smooth. Synai'tfirial tubei'cles unim- 

 poi-tant. The arms as in the preceding speiMuiens rather coarse. 

 Distal Bi--segments a little ovei'lapping. not bent outAvards. with spiny 

 borders. 



The specimens agree with those of Carpenter and Clark except 

 that the joint l)etween Br 1 and 2 is (d' a synarthrial not of a syzygial 

 nature and that the ])roximal pinnules are somewhat shorter. 



Nova Acta Reg. Soc. Sc. Ups , Ser. 1, Vol. it. X:o 6. Iin))r. '" a 192J 



