392 On North Pacific ZoroasteridaB. 



abactiual pedicellarise smaller and less 

 numerous. Bering Sea to centi-al Cali- 

 fornia sacculatum (Fisher). 



b^. Rays longer and slenderer, the third or 

 lowest actinolateral series of plates ex- 

 tending along onlj the proximal third of 

 the ray ; spines rather slenderer, and 

 ahactinal pedicellariae larger and more 

 numerous. California, soutli of Point 



Conception ectenes, subsp. n. 



«^. Size medium, the plates and spines not 

 especially sacculate or slimy — about as in 

 Zoroaster ; abactinal papular areas medium 

 in size, the areas with one or two papulae 

 wliich do not occupy all the area ; adradial 

 plates small, more or less overlapped by 

 the carinals and superomarginals ; abacti- 

 nal plates with numerous, accessory, mili- 

 ary spinelets ; actinolateral spines broad, 

 flat, and more or less truncate ; terminal 

 plate small : rays not attenuate distally. 

 b'. Eays slenderer and longer, disk smaller ; 

 plates, especially the carinal and margi- 

 nal, not broader than long; superomar- 

 ginals not noticeably prominent ; spines 

 slenderer ; pedicellarise larger. South- 

 ern California (south of Point Concep- 

 tion) and Lower California platyacanthtim (Clark). 



b"^. Eays broader and shorter, disk slightly 

 larger ; plates, especially the carinal 

 and marginal, broader than long ; supero- 

 marginals noticeably prominent, at least 

 distally ; spines more robust ; pedicel- 

 larise shorter. Oregon to Central Cali- 

 fornia rhomakum, subsp. n. 



Myxoderma sacculatum ectenes, subsp. n. 



Differing from typical 31. sacculatum * (Fislier) in liaring 

 slenderer and longer rays, the third or lowest actinolateral 

 series of plates present on only a small proximal portion 

 (about a third) of each ray, rather slenderer abactinal spines 

 generally, and larger and more numerous abactinal pedi- 

 cellarise. R = 210 mm., »' = 16 mm., R = 13r; breadth of 

 ray at base 19 mm. 



Type-locality. — South-west of Santa Cruz Island, Cali- 

 fornia, 640 fatiioms. 



This race is found off southern California, from the vicinity 

 of Santa Cruz Island to Los Coronados Islands, and from 

 about 500 to 1100 fathoms, usually on green mud. 



* Zoroaster (^Myxoderma) sacculatus, Fisher, ibid. p. 316. 



