140 T. GiSLEN, 



(he Zenometrinw to be the orighial type because of the formation of 

 the Cd which probably more than that of the Bathyvietrina\ resembles 

 the Cd of the more primitive {Atelecrinoid?) forms from which (he Ma- 

 crophreats originate. 



The new species, which 1 have named after Prof. A. Wieen of 

 Uppsala, is in other i-espects approaches closest to Ps. immlata and 

 Ps. anomala. 



Perometrinse A. H. Clakk. 



Erythrometra A. II. Clakk. 



E. rubra A. II. Clark. 



Fig. 150-152. 



Syii.: Aniahni ruber 1907 A. II. Clakk Proc. U. S. Nat. Mtis. Vol. :«, 

 p 146. ' 



Erythrometra ruber 1908 A. H. Clakk Wash. Proc. Biol. See. Vol. 121, p. 

 126; Proc. U. S. Nat. Mus. Vol. 34, p. 316; 1909 Kobenhavn, Videnskabl. Meddel. 

 p. 190; 1912 Clin. Ind. Oc. p. 233; 1915 Wash. Journ. Acad. Sci. Vol. 5, p. 215; 

 1918 Siboga Exp. Vol. 42 B, p. 236. 



From St. 11=8 sj)ecimens. 



Sp. I (St. 11) C. XX 24-25 (D). 34—36 (V): 7—11 mm. h' and 

 2'' segments short, 3'' cubical, 5*'' the longest, L=l '/2 — 1 ^ s br, (hen 

 slowly decreasing, 10"' segment about cubical. From this segment a 

 dorso-distal swelling on the cirrals, and this prominence gradually de- 

 velops into a blunt, longitudinal crista (most prominent about 9 — 10 

 segments from the last one). Antepenultimate segment almost smooth. 

 Opposing spine stout, h = ^/3 of the br of the segment. Terminal claw 

 curved, L about the same as (he penultimate segment. 



R — s h - \/6 br. I Br 1 h — '/2 br, laterally almosi free, (hough 

 nearly standing, distally somewhat incised in the middle by (he ob(u- 

 se-angled proximal border of (he axillary. The synarthrial swelling 

 inconspicuous. Axillary rhombic, h ^ ^4 br, lateral angles with ve- 

 ry slight, small spines. Arms X, 25 mm. +. Br — s 1 inwardly united 

 by pairs, outwardly i '/2 X broader. The proximal border of Br 2 



