ART. 6 



A NEW SEA STAE — FISHER 



Small crossed pedicellariae are very abundant singly and in 

 groups among the papulae; in a broad zone around the abactinal 

 and marginal spines; and in half wreaths on the outer side of the 

 actinal and adambulacral spines. The abactinal measure 0.27 to 

 0.3 mm., while the adambulacral measure 0.35 to 0.4 mm. (large 

 specimens with R 270 mm. or more). Apparently there is a gradual 

 increase in the number of crossed pedicellariae, especially the papu- 

 lar, with age. 



Madreporic body large, subplane with a row of spinelets on the 

 adcentral border; it is situated a little less than one-third r from 

 center of disk. 



Type.— C2ii. No. E1237, U.S.N.M. 



Type locality. — Station 3278, north of the end of Alaska Penin- 

 sula (56° 12' 30" N., 162'' 13' W.), 47 fathoms, fine gray sand; bot- 

 tom temperature, 38.8° F. 



Distribution. — Southern Bering Sea, from Bristol Bay to Un- 

 alaska; the coast of Asia from Avatka Bay, Kamchatka, to the 

 Okhotsk Sea; 11 to 48 fathoms, fine sand, mud, pebbles, stones; 

 temperature range, 38° to 41.2° F. 



Specimens of Evasterias echinosoma examined 



EXPLANATION OF PLATES 

 Plate I 

 Evasterias echinosoma, type, abactinal surface. 



Plate II 

 Evasterias echinosoma, type, actinal surface. 



o 



