The Crtnoids from Dr. S. Bock's Expedition to Japan MM 4. 121 



Br 1. Arms X, 70 mm. Br 1 and 2 with a carination similar to the 

 one on tlie I Brachials but very mueii slighter. Br-s 1 inside conti- 

 guous in j)airs, outside broader, as also Br 2. Syzygies: 3 + 4, 13 + 14, 

 18+19... distally with an interval of about 5 oblique articulations. 

 Br 1 — 10 discoidal, then irregularly oblique joints. The pi-oximal ossicles 

 rounded and smooth: from Br 15 a low, median, longitudinal ci-ista, 

 slightly projecting in lateral profile. 



P, 13; 5 mm. R, 13; 5 mm. P., S— 9, 3,i mm. P, similar. l\ 

 coarser than P.,. The segments rather uniform, smooth, a little longer 

 than broad, distally somewhat angular. P^ — P^, + 10; 3 — 4 nun. (Proxi- 

 mal segments very slightly dorso-ventrally flattened). Distal p-s + 14; 

 5 — a mm. (l*" and 2'' segments shorter and a little coarser than the 

 following ones, which have the L = 2 br). 



Disk a little incised, with large ealeai-eous granules, diameter 

 4 mm., colour brown. Otherwise the animal is light yellow-brown. 



This new species resembles most closely P. lata from which, 

 however, it differs sharply by the cirri, very short in comparison with the 

 arm-length but in spite of this with relatively many segments, by 

 the rather smooth proximal ai-m-parts, and, above all, by the proximal 

 pinnules, which have a few, rather long pinnulars. 



After a comparison with specimens of Dr Mortensen's collection 

 I am convinced that this species often has XI or XII arms attaining 

 a length of > 70 nun. II Br-s are 2. P^ might get 15 segments and 

 attain a length of + <i mm. P, — Pj,j are shoi't, with the 5 — first seg- 

 ments somewhat thickened in dorsal view. 



In the short genital pinnules has the species an unusual resem- 

 blance to a spider, whence the luuue. 



Diodontometra n. gi'ii. 



This execdingly ])eruliar type of (he family GharUometridn' re- 

 sembles the genus (Jharitometra by the strongly expanded proxinuxl 

 segments on the genital pinnules. From this genus it differs, however, 

 in several characteristics. The arms are XX, the II Br-s: 2. Od is 

 high and jtointedly conical and llic eirri arranged in radial groups, 

 separated by large interradial interspaces. And, finally, tiu; opposing 

 spine is divided into two prominences standing side by side and usu- 



Nova Acta Reg. Sue. S<'. Up.s., Ser. 1, Vol. n. N:o li. Iiu])!-. -»/3 1922. i(i 



