S-4 T. GlSLÉN. 



j;>»rea-cirri(. Nevertheless certain dillereiiees iniglit be gi\eii wliieli 

 speak in fa\onr of the presei'vation of the species albojnir/mrea. C. 

 manca in (lie above-deseribecl specimen has 25 ciri'als at a (;ii'rus- 

 lenglh of 11 nnn: tiie cirrals are shorter than long; C. alho/iurpurea 

 does not have the same nnmber of cirrals until a cirrns-length of 15 

 mm.: the proximal cirrals are longer than broad. Both the species 

 during their evolution show a tendency towards short cirrals, but reach 

 this stage at different cirrus-lengths. The characteristic dorsal spine 

 of C- alhopurpurea (and gracilis) is, in a somewhat similar form, to be 

 found in the above-described young stage, referred with some doubt 

 to G. disciformis. 



As to the young stages it may be noted that young foi'ms of 

 C. alhopurpurea have more than X arms already at an arm-length of 

 about 15 mm., when the brachials are still very juvenile, long, and 

 strongly hour-glass-shaped. The young of C. diHciformis even at an 

 arm-length of 25 mm. has X arms and rather smooth brachials. 



Cyllometra pulchella n. sp. 



Fig. i;3;3 — 140. Photo 9. 



Fn.in St. n (7), 12 (1). 13 (38), Ki (2), 17 (3) =^ 40 specimens. 



Sp. 1 (St. 13) Cd thickly discoidal, the free, flat, dorsal surface 

 1.5 mm. C. XXIV 25—29; 10—12 mm. in two whorls. P' — 3"^ segment 

 shorter than broad, 4"' about cubical, 5*'' somewhat longer, the fol- 

 lowing ones L about 1 ' s br. Antepenultimate segment a little longer 

 than broad. From about the 7* segment a slight dorsal transverse 

 carination, at the 12"' or 14"' segment a little thickened on both sides 

 of the median line, appearing there as two inconspicuous tubercles 

 (visible only by high magnification): from the 15"" or 20"' segment a 

 single swelling which disappears again on the outermost cirrals. Penul- 

 timate segment about as long as broad, with an opposing spine, h = 

 ' 3 — 1'2 of the br of the segment. Terminal claw pointed, curved. 1^2 

 times as long as the preceding segment. 



R — s very narrow bands, laterally united in the proximal half. 

 I Br— s 1 laterally free, h = i/3 — V*Xbr. I Brax pentagonal, h -= ^ 3 

 br, forms vid I Br I a small synarthrial prominence with an indis- 



