76 T. GisLEX, 



The length of the proximal p — s in Sp. I is, as shown abo\e, 

 very variable. It seems to me to he i-ather unfortunate within this 

 family to base the characteristics of genus on the relation between 

 the length of Pj, Pg and P^, as has been done in the genera Liparo- 

 metra, Lamprometia and DicJtrometra. which surely are very closely 

 related to each other. 



Colobometridae A. 11. Clark. 



Cenometra A II. ('lahk. 

 C. bella (IlAini.Aiiil. 

 Fig. 57 — 50. 74. 

 Syn.: Antedon bella 1890 IlAiiTLAii! Xaclir. (ies. (i.ittiiigpii 1890,1). '"■^: ^^-'l 

 Leop. Carol. Cur. Vol. 58: 1; p. 43. 



Cenometra bella 1909 A. H. Clakk Wash. Proc. Biol. Soc. Vol. 22, p. 8; 

 1912 Crin Ind. Oc, p. 153; 191.0 Joiirii. Acad. Sci., Vol. 5, p. 214; Monograph 

 pp. 48, 67. 



From St. 49: 1 specimen. 



Sp. 1. Cd thickly discoidal (h = I,.-, mm.) with raised margins 

 round the free dorsal surface, the diameter of which is 2 mm. — C. 

 XXVI 34—38; 10—18 mm. in two whorls. The 12 first segments: L 

 about '2 — ^/3 br, the following ones similai' or a little shortei'. The 

 distal half of the cirrus with a low transA-erse I'ibbon. which is indis- 

 tinctly (or not at all) divided into two tubercles (slightly projecting in 

 lateral view). Opposing spine: h = ' 2 of the br of the segment. Ter- 

 minal claw coarse, i)lunt-ended. L about the same as tiie preceding 

 segment. 



R — s h = ' 4 br. most apparent in the corners, baso-laterally 

 united. I Br 1 h = ' 3 br, laterally free, forming with I Brax a distinct 

 synarthrial tubercle. I Brax h = ^3 br. i)eiitagonai. A \eiitro-latei"at 

 |)rominence on each ossicle from I Br 1 — Br 1. largest on II Br I. 

 whei'e it occupies the whole side of the ossicle and i-eaclies ' .-. of 

 the lateral h (d' the segment. 11 and 111 Br — s: 2 (the lattei- ones on 

 the outer sides). Primipostaxillaries basally uinted inside. Arms XX\'I, 

 90 mm. Syzygies: 3 + 4, 12+13, distally with an interval of 7 (—10) 



