62 'l\ r.ISLKN-, 



Sp. 7 |8l. -to) C. XII !»— lU; 2,.-,— -i mm. Ai-ms X. 20 mm. some- 

 Avhat smootlier tliaii in the ])receding sp. — P, 7 T. P^ (1 T. P., and 

 P3 wanting, — Mouth a little tiis|)laeed. Anal cone strongly pa|)illosc. 



Sp. 8 (St. 45) ('. XIV 8 — 11: 2.5-4 mm. Arms XII. l(j mm. II 

 Br-s 2. — P, 7 T. Pg and P., missing. Anal cone papillated. 



Sp. <). (St. 45) C. X\ II 10—14: 3-4.;. mm. 3" and 4'" segment. 

 L = 2 111-. Anns X. 15 mm. (if sen-ate type. Pj 5 high T. P.^ and P;, 

 absent. 



Sp. 10 (St. 45) C. IX 7 — U: 2—2..-, nnn. Ai-ms X. 12 nun.— P, + 

 (1 T. P„ and P., wanting. Mouth central. 



Sp. 11 (St. 45) C. X^4 10. Anns X. 10 nun. P.^-Pj wanting. 



Sp. 12 (St. 45) V. XVII S— t). Arms X, 4- 15 mm. Pi 9 T. P., mis- 

 sing. P3 without a comb. — Anal tube smooth. — Perhaps Co'iii:iiii>i-'iia 

 ignota mimita. 



Sj). 13 (St. 45) C. XIII !t— 10: 3 nun. Arms X. broken. R— s con- 

 cealed. — Pj + 6 T. Pg rudimentary. 



Above I have brought together all the young Comasterids from 

 the Bonin Island that 1 have not been able without doubt to identify to a 

 certain species, ^^'ilh regard to .some specimens, however, I am i-athei- 

 sure as to which species they belong by comparison with somewhat 

 larger, systematically determinable specimens from the same locality. 

 (This is for instance true of Gnmaster aeirala sp. juv I). 



At the same time as the investigation made abo\ e I also tried to 

 establish some characteristics of systematical \alue for the determina- 

 tion of the young Comasterids. I-]\cii a hasty reflection tells us at 

 once that this is a \ery difficult task. Foi- the systematical charac- 

 teristics in the Conmstei-ids, as in all Comatulids, are taken from the 

 length, breadth, appearance and order of magnitude of the calcareous 

 ossicles which combine to constitute the animal, and these ai-e very 

 different in young specimens and in full-grown ones. — If guided by 

 the figures and statements gi\-cn al)o\»' one examines the characters, 

 the following facts are evident. 



I) The cirri in all young forms correspond to a type al)OUt 

 the same as the one in Cniiiafiler nerraia or Gomaiella hradniciyra^ that 

 is to a number of segments of-! 10. wiiere the 3'' and 4"' segments 

 are the longest, L = 2 or 3 X bi'. 



