- 3 1 



from 35 mm to 90 mm. long 28 55 cirrus segments [from Madagas- 

 to the Kei [slands and southern Japan; 70 — 252 [? 273] 



Meti ... Perometra 



the ossicles of the IB nd first two brachials may I»- just in 



contact laterally, but their si ver sharply flattened, and prominent 



synarthrial tubercles ;ir< never developed; their lateral borders always 

 ear tubercles, one or manj to each ossicle, and their distal and proximal 

 re usually prominently everted and tubercular 

 interbrachial portions of the perisome naked; P a always present (Kei 

 [slands and southern Japan; 204 — 344 Metres) .... Nanometra 

 interbrachial p of the perisome with numerous prominent rounded 



- nodules which are not in lateral contact; P„ usually absent 

 Moli ind southern Japan; 99 — 270 Metres). . . . Erythrometra 



Perometra A. II. Clark. 



Key to the Species of the Genus Perometra. 



irsal rounded conical; cirri numerous, long and slender, XXX XL, 

 25 mm. to 30 mm. long; arms 50 mm. long*, or longer 

 11-14 arms 50 mm. long: IIBr series 2; synarthrial tubercles greatly, but 

 not extravagantly, developed: all ol the earlier pinnules present (Providence 



[sland, northeast of Madagascar; 225 Metres) afra 



IC) arms 70 mm. to 90 mm. long; synarthrial tubercles extravagantly developed; 

 1 usually absent (southern Japan, from the Korean Straits to 



mi Bay; 7(1 — 250 [? 273] Metres) diomedéae 



entrodorsal low hemispherical ; cirri X\'. 28; 10 arms 35 mm. long-, all the 

 earlier pinnules present Kei Islands; 252 Metres) pusilla 



1. Perometra afra \. II. Clark. 



A. II. I i VI ... Proc. U.S. National Museum, vol. 40, 1911, p. 43 [Perometra afra). 



:i Misccllaneous Collections, vol. 61, 1 9 1 3 , N° 15, p. 57 [Perometra afra 



2. Perometra diomedéae \. II. ("huk'. 



A. II- Cj VRK. Proc. U. S National Museum, vol. 33, 1907, p. [46 [Antedon diomedt 

 I'i National Museum, vol. 34, 190.S. p. 316 [Perometra dit 



;. Perometra pusilla 1'. 11. < arpenter). 



1'. II. (aki. "Challenger" Reporl latulae, 18S8, p. 1 ; 1 . pi. 23, fig. 1 [Antedon 



pil!. 



A. II. ('1. ark. Proc. U.S. Natioi il Museum, vol. 59, 1911, p. 561 [Perometra pusilla). 

 — — Smithsonian Miscellan ons, vol. 61 1 113, \" 15. p. 58 [Perometra pusilla). 



