The Ceinoids FRO>r Dr. S. Bock's Kxpeimtion to Japan 1!)I4. .145 



2 br, -i"' — ()"' L = 3 X br, rather imicli hour-ghiss-shapcd, 7"' segnient 

 L = 2 V'2 br, antepeiuiUiniate one L Acry slightly greater than bi'. Tcr- 

 iiiiiial claw eurvetl, about, as long as the preoeiliiig segmeiil). The 

 distal cii-rals smoother, in side view thickened. 



R — s concealed. I Br-s 1 laterally free, in the middle incised 

 by the backward projection from the axillary. Their latei'al h = ' 4- Va 

 of the bi' of the segments. Axillary h = br. w ilh a tongue-like pro- 

 minence both proximally and distally. the proximal projection is longer 

 tiian the distal one. The side-angles of the axillary overlapping the 

 ! Br-s 1. Arms X, 45 — 50 nmi. Br-s 1 inwardly contiguous basally, 

 on the outside three times as wide. Br 2 with a stout synai'thrial 

 tongue. The -first syzygial pair (;{ ; 4| a little broader inside than 

 outside. The following segments iri-egularly scjuarish. The distal Br-s 

 knotty and swollen, somewhat longer than broad, l-'x. of syzygies: 



3 + 4, 9+10, 14+15 etc. with an interval of 3 oblicpie articula- 

 tions. 



Pi 15: 7 mm (1^' and 2'' segments short, IS'' L = 2— 2 V2 br, 4"' 

 and tiie following ones L=^3-4 br), Pg 8; 4 nmi. (with a genital gland 

 from the 3'' or 4"' to the 7'" segment), P3 9; 4,.-. mm. (a gonad from 

 the 3'' to the 7"^ segment). The distal segments a little spiny distally. 

 Distal p-s. + 10; (i — 7 nun. 



Disk 3,8 nun., smooth, without stoutei- granules. Anal cone 

 3,2 mm. 



Sp. 2 (St. 4) A very young specimen, probably belonging to 

 this species. 



C. + XXVI 7—10: 2—3 mm. in 2 whorls. Cd low, flattened, 

 almost hidden by cirri. (2'' cirral L -^ 1^4 br, the following segments 

 1. 4 X br. distally somewhat expanded. Antepenultimate segment 

 L--l'\4 br. Penultimate segment L -- br, with an indistinct opposing 

 spine). 



I Br I h V/3 br. Axillary h— ^4 br, the backward directed 

 corner with a large synarthrial tongue, about twice as long as the 

 distal angle. Arms X, U» mm. j-. Br-s 1 almost free inside. Br 2 

 with a synarthrial tongue. — P, + 10: 1,8 mm. (L of the segments-- 

 2 ' 2 br). Between P, and flic distal pimuiles a gap. Disk l,:i mm. 

 Anal cone 1 mm., narrowly sausage-shaped. 



Novft Acta Reg. Soc. Sc. Ups., Ser. 4. Vol. 5. N:o (1. Ini)ir. '',4 1922. 19 



