392 On North Pacific Zoroasteride. 
abactinal pedicellarize smaller and less 
numerous. Bering Sea to central Cali- F 
FOINIA] stereo See: Wa demote .. sacculatum (Fisher). 
6°. Rays longer and slenderer, the third or 
lowest actinolateral series of plates ex- 
tending along only the proximal third of 
the ray; spines rather slenderer, and 
abactinal pedicellarize larger and more 
numerous. California, south of Point 
Conception ’*. .. Genk wosee cone ceeeeee €Ctenes, subsp. n. 
a>, 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 papulz 
which donot 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. 
8’. Rays slenderer and longer, disk smaller ; 
plates, especially the carinal and margi- 
nal, not broader than long; superomar- 
ginals not noticeably prominent ; spines 
slenderer ; pedicellarize larger. South- 
ern California (south of Point Concep- 
tion) and Lower California .......... platyacanthum (Clark). 
6°. Rays 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- 
larie shorter. Oregon to Central Cali- 
EORMIB? (nis viele: AANA ao oe rhomaleum, subsp. n. 
Myxoderma sacculatum ectenes, subsp. n. 
Differing from typical MZ. sacculatum * (Fisher) in having 
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- 
cellarie. R=210 mm. r=16 mm,, R=13r; breadth of 
ray at base 19 mm. 
Type-locality.— South-west of Santa Cruz Island, Cali- 
fornia, 640 fathoms. 
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. 
