The Ceinüids from Dr. S. Bock's Expedition to Japan l!>14. !t!» 



Sp. 6 (St. ;U) C. XXII 25 — ;{1; 1-1—20 mm. Arms + XX, DU mm. 

 Br-segments about 130, from about Br 100 a slight median earination. 

 Syzygies with an interval of 4 — 10 oblique articulations. — P, IS; 5,:. 

 mm. P., 17; 9,5 mm. P., Ki — 17; 8,5—9 nun., P^ 10; 9,5 nmi.. P,, i:{: 

 (i mm. Distal ]>. 17: 9 — 10 mm. — Disk regenerating, 3,5 to 7 mm. in 

 diameter. 



Sp. 7 (St. 34) The dorsal, free surface of Cd 2 nun. C. XIX 

 2,-)_35: 14 — IS mm. Arms ± XVI, 45 mm. — Pj 15: 4,5 mm. P. 17; 

 7 mm. Distal p. 14; 8,5 mm. P,, small 3.5 — 4 nuu. P,, and l\ 17, + 9 

 nun. Disk regenerating. 



The interradial ])rominences of the R — s most distinct on the 

 youngest specimens, then the I Br-s 1 increase more rapidly and 

 come in lateral apposition. In the largest specimens 1 Brax is almost 

 rhombic with variable earination. The wing-like prominences on the 

 D' and 2'' segments of the promimal pinnules are in Sp. distinct out 

 to about P^o but still noticeable on the distal pinnules. 



Thalassometridae A. H. Clark. 



Pterometra A. ]\. Clark. 

 Pt. trichopoda A. II. Clark. 



Fig. 101, 102. 



Syn.: Pfilotiirlra irirliopoda 190S A. II. Clark Wa=;li. Sinilhs. Misc. Coll. 

 Vol, .52, p. 224, 



Ftcromcira trirhojwdn 1911 A. il. Clark Wash. Proc. U, S. Niit. Mus, Vol. 

 39, p. 545; 1912 din, Ind, Oc, p. 190; 1915 Monograph, p. 81; 1918 Siboga Exp, 

 Vol. 42 B. p. 143. 



From St. 75 (1 sp.), 48 (1). 59 (3) = 5 specimens. 



Sji. 1 (St. 45) Cd h = 2 nun., br = 2 mm. with 5 radially airanged 

 warts on the dorsal cone, 



C. XXI\' 67 (D)— 75 (^'), 38—44 mm. arranged in 10 rows, 2 

 rows in every radius, and 2 or 3 cirri in every row. 4*'' segment 

 cubical, 5"' to about 20"' L = 1*2 br, then shorter segments again. Distal 



