The Crixoids from Dr. S. Bock's Hxpedition to Japan I'.tU. lO;^ 



Asterometra anthus A. H. Clakk. 

 Fig. 02-!»S. I'll,, to 1(5. 



Syn.: Anti-don lou'iicina (pari) ISM:) Bi:i.i. Joiiiii. IJnii. Sue. NOl. 24, p. :339. 



AntedoH anthus UI07 A. H. Ci.wiw V\w. I . S Xai. Mas. \',.| :j:j, p. J36. 



Ffilometia untlnis 1908 A. II. Ci.akk Siiiillis .\[i>c. ('(.11. \ Ol. .j(». p. 859. 



Asterometra anthus 1912 A. H. Clakk Criii. Iiid. Oc, p I!):); 1!»1.") A\'ash. 

 Joiirn. Acad. Sci. Vol. 5, p. 215: 1918 Siboga Exp. Vol. 42 B. p. 141. 



Asterometra acerbu 1909 A. 11. ('i.\i;k Pioe. Biol See. Vol. 22. ],. 147: I9I2 

 Clin. IiKi. Oc, p. 193; 1915 Monograj.h p 181: 1918 Siboga Exp. Vol. 42 B. p. 141. 



Asterometra lepida 1908 A II. ('i.\i;h Wa^^li. Proc. Biol. Soc. Vol 21. p. 

 229: 1909 Vidcnslcabi. M.-ddidser, Kohenhavn. p. 181; 1912 Criii. liid. (Jf., p. 195; 

 1915 Wash. Joiirii. Acad. Sci. Vol. 5. p. 215: 1918 Siboga Kxp. Vol. 42 B, p. 141. 



From St. 45 (5). 46 (2). 47 (o). 5:5 (Uj, 54 (2). 55 1 1 ), 5(i (7), 

 57 (Ij, 59 (20j = 54 specimens. 



Sp. 1 (St. 51) Cd pointedly conical, hv '.\ mm., visible h = '.^ nmi. 

 Dorsal |)ole smooth, arched, somewhat hollowed at the top. 



('. XVII 80 — 81; 50 — 55 mm. arranged in rows which are sepa- 

 rated by radial interspaces. 1^' and 2'' segments short, then increasing 

 to cubical or a little longer (5''' — 20^'' segment), distally decreasing 

 again, from about the 40"' segment L ^ ^ 2 br. Usually the H''(or 5*^|- 

 about the 15"' segments have a dorsal crista, which is most marked 

 on the proximal segments. The 15"' — 25"' segments arc most often 

 moi'c or less smooth, then a dorsal crest appears, whieii distally be- 

 comes pronounced to dorsal spines. Opposing spine lai'gcr than the 

 preceding ones, h = ' 2 of the br of the segments {\^ — 5 last segments 

 l)efore the penultimate one have veiy slight dorsal spines or lack them 

 entirely. Terminal claw short, as long as the preceding segment |. 



K — s h = ' 4 lir with a tuljercle on the medio-dorsal pai't. I iJr I 

 baso-laterally united, br = 2 ' 2 X L. I Brax low pentagonal, like the pre- 

 ceding fissicle with an indistinct, median, longitudinal crista. II Bi- — s : 2, 

 similai' to the I Br — s. Arms X\'I. 05 mm. Pi-imipostaxillaries con- 

 nected basally in pairs. Arms laterally shari)ly llattened out to about 

 Br 10. Ex. of syzygies: ;{ 4. 12 - B}. 22 - 2;{, ;{0 -i ;^l. ;i7 + 38 . . . 

 or 3 + 4, 13H 14, 21+22, 28 + 29, 35 4 30, 41+42, 4S + 49, 55 

 + 56.. in a single case 4 + 5. 13-4-14... Aftei- Br 10 decidedly 



