156 BIOLOGICAL SUEVEY OF 



ECHINODERMATA 



This phylum has been arranged according to Mortensen's 

 Handbook (1927). The stations are not listed for a few of 

 the species, since they are found almost everywhere and are 

 the most conspicuous invertebrates of the Region. 



Class ASTEROIDA Sea-stars 

 Order PHANEROZONIA 

 Suborder PAXILLOSA 



Porcellanasteridae 

 Ctenodiscus Miiller and Troschel 

 C. CKisPATus (Retzius). (Mortensen, 1927, p. 53, fig. 30.) 

 Taken on a few muddy bottoms, depth 62 to 210 feet. Most 

 common on the mixed blue clay and mud bottom at D 150, 

 where it ranged in size on August 6, 1931, from small speci- 

 mens up to 65 mm. Stations : D 27, 96, 131, 150. 



Order SPINULOSA 



Solasteridae 

 SoLASTER Forbes Sun-stars 



S. (ceossaster) papposus (Linne). Mortensen, 1927, p. 

 112, figs. 66(1), 67.) Taken uncommonly on rocky bottoms, 

 depth 52 to 76 feet. Stations : D 39, 40, 71, 94. 



S. Ei^DECA (Linne). (Mortensen, 1927, p. 115, fig. 68.) 

 Taken more frequently than the preceding on rocky bottoms 

 with an admixture of finer material, clay, gravel, or mud, from 

 about low water to 194 feet. Common at D 39 and 43. Sta- 

 tions; D 18, 31, 39, 40, 43, 44, 50, 68, 70, 71, 94, 98, 106, 131, 

 139,146; S19, 29, 50. 



Echinasteridae 



Henricia Gray {Crihrella) 



H. SANGuiNOLENTA (0. F. Mullcr). (Clark, 1904, p. 555, 



pi. 3, figs. 10, 11 ; pi. 4, fig. 22 ; Mortensen, 1927, p. 118, fig. 70.) 



The occurrence of this species is very similar to that of 



