The Tkinoids from Dk. S. Bock's Exi-koitiox to Japan I!M4. 109 



I Br 1—2 3 + 4 5 (i 7 8 9 10+11 12 13 U 15 10 17 

 IJ 1 1-2 - \ 



I Br 1—2 3-4 5 7 8 9 10+11 12 13 



Disk concealed, probably with oi'als; com])are for instan<!c sp. 

 38, 44, 45, 50, 51. 



Sj). 38 (St. 53) The L of tlie dislal piiiniilars 3 br. Kiuiimen- 

 tary orals. 



Sji. 39 (St. 53) and Sp. 40 (St. 53) The L of the distal piiinnhus 

 on the distal p — s 2' 2 br. 



.s>. 41 (St. 45) L of cirral 5 — 7 = 1 • 2 br. The L of the distal 

 segments —= br. A dorsal spine from cirral 10. — B— s projecting IR 

 as small prominences. R — s h P2 br. in lateral apposition, with a 

 strong longitudinal crista, |)ro.\inially ending in a blnnt spine. I Br — s 1: 

 h= '2 br. I Brax h - :i br. A slight synarthrial carination. Arms 

 »wall-sided» with small lateral crests out to Br 2. The entire arm 

 with 40 Br — s. A dorsal Br-spine from the 25"' segment. The distal 

 pinnulai's with small spiny whorls in the distal ends. 3'' and 4"' pln- 

 nular L = 3 br. 



Sp. 42 (St. 45) — Sp. 43 (St. 45) — . 



Sp. 44 (St. 45). The L of the segments of the dorsal cirri 1 ' 2 — 

 2 br. Complete pinnulation. Small orals. 



Sp. 45 (St. 45) P., wanting. Orals large and well developed, 

 covering V.s of the radius of the disk. 



Sp. 46 (St. 47) R— s:h -= ^ 3 br with a dorsal crista. The L of 

 the distal pinnulars of the distal pinnules 2 br. 



Sji. 47 (St. 47) R — s h^lV'2 br. An indistinct median crista 

 on I Br 1 and 2. The L of the distal pinnulars =^ 2 I/2 bi-. 



Sp. 48 (St. 47) R-s h-=li,2 br. The L of the distal pinnulars 

 2 ' 2 — 3 br. Orals resorbed. 



Sp. 49 (St. 47) R— s: h = br. I Br— s 1 and 2 rather smooth. 



S/j. 50 (St. 47) R — s: h > br. A crista on 1 Br 1 and 2 w itii 

 slight medio-dorsal tubercles. P.^ sometimes lacking. The L of the 

 distal pinnulars 2 ' 2 lir. Orals thin, but w ell presei'xed. 



Sji. 51 (St. 54) 4"' cirral the longest L- 3 l)r. Dorsal sj)ine 

 from the 0"' (— 10*'') segment. — R — s h=^lV/2 br. with a well bor- 

 dered median tubercle. 1 Br — s 1 and 2 similar, but with a meilian 

 keel, h — ' 3 and ' 1 X br respectively. A slighter keel on Br 1 and 2. 



