ASTEROIDEA OF NORTH PACIFIC AND ADJACENT WATERS FISHER. 



115 



Mouth plates narrow, with six or seven marginal spines and seven or eight 

 superficial ones, forming together a double series on the raised exposed surface of 

 plate parallel with median suture. Inner spine of superficial series largest, and 

 like the rest, slender, pointed, tapering. All spines decrease in size toward outer 

 end of plate. Innermost marginal spine situated nearer peristome than is the 

 enlarged inner superficial spine. 



Madreporio body between second mid third lateral rr)ws of paxilliT; and hidden 

 by them. 



Color in alcoliol, abactinal surface dull Indian red, actinal surface and lateral 

 spines, whitish; some small specimens with abactmal surface darker Indian red, 

 mottled with whitish, that is, with whitish jiaxillje hero and there. This fades into 

 browTiish red, mottled with bleached yellow. The color washes off under a jet of 

 water. 



Anatomical notes. — Gonads in a series along either side of abactinal wall of ray 

 as in preceeding species. Each tuft has about four short thick fmger-like divisions. 

 No anus; no intestine; no intestinal cceca. Superambulacral ])lates well devel- 

 oped, absent from first ambulacral plate. Tube feet large, with bluntly pointed 

 tips; no calcareous deposits in their walls. 



Variations. — The most conspicuous difference exhibited by small specimens 

 (R = 27 mm.) are as follows: usually but one lateral sj)ine (occasionally two) on 

 outer end of inferomarginals, auxih'ary spinules less conspicuous, lateral paxillae 

 sometimes rotund — less obviously cjuadrate; actinal intermediate pediccllaria; 

 confined to interracUal regions, or not extending far onto ray; abactinal pedicel- 

 lariffi slightly more conspicuous than in large specimens. Spines and spinelcts are 

 slenderer in small and medium sized tlian in large examples. 



Type.—€at. No. 2 1928, U.S.N.M. 



Type-locality. — Albatross station 2970, vicinity of Santa Barbara Islands, in 

 29 fathoms, on fine gray sand and mud. 



Distribution. — Monterey Bay, south to San Pedrcj, California, in 15 to 50 

 fathoms. 



Specimens examined. — Thirty-throe from the following Californian stations: 



Specimens of Luidia t lulwiffi examined. 



Locality. 



Depth. 



Nature of bottom. 



2966 



2968 



2969 



2970 



4431 



4439 



4452 



1^2 



LV-1 



LV-2 



Lxrv-1... 



LXXXI-5. 



Off Santa Barbara. 



09 Santa Rosa Island.. 

 Monterey Bay 



Off San Pedro . 



30-41 

 42-40 

 49-50 

 28-24 



23-25 

 25-22 

 19-11 



coarse mud 



rand 



gray sand, pebbles 



fine gray sand, mud 



mad, fja.y sand, rocks . 



gray sand, shells 



green mud, fine sand. . . 

 sand, fine, mud, shells., 



mud, sand 



rocky In spots 



sandy, kelp 



sand and cobbles 



U.S.NatMus. 

 Do. 



AlbattOM, 190-1. 



Do. 



Do. 



University of Cali- 

 fornia. 



Do. 

 Do. 



