1 52 



HULLETIN 76, UNITED STATES NATIONAL MUSEUM 

 Specimens of Evasterias troschelii examined — Continued 



Locality 



Taylor Bay, Gabriola tnlet, British Columbia 



Heaver Harbor, British Columbia 



Comox, British Columbia 



Departure Hay, British Columbia - 



Do 



Do 



Clayo<iuat Sound, British Columbia 



Barclay Sounii, British Columbia 



Victoria, British Columbia • 



Straits of Fuca 



Port Townsend, Wash 



Puget Sound, Wash - -- 



Puget Sound (Simeahmoo) 



Paget Sound (Tacoma) - 



Orcas Island, San Juan Islands, Wash 



Friday Harbor, San Juan Islands 



Station 4205, vicinity o( Port Townsend, Wasb., 26 



fathoms. 

 Station 4222, same locality, 39 fathoms 



Beatrice, Humboldt County, Calif. 



Trinidad Head, Calif 



San Francisco Bay, Calif 



Monterey Bay, Calif 



Carmel Bay, Calif 



f. tro- 



rrhtlii 



'35 



2 



'13 



1 juv. 

 2 



1 



3 



5 



122 



6 



1 



I otoeo- 



lata 



f. acan- 

 Ihih 



stoma 



2 

 2 



1 



2 



ljuv.(?) 



Remarks 



Ubatross. 



Do. 



acanthostomn not typical. 

 Stanford Coll., W. F. Thompson. 

 Calif. Acad. Sci. Coll., W. K. Fisher. 

 Stanford Coll., C. H. Gilbert. 

 Albatross. 



Do. 

 D. S. Jordan. 

 J. G. Swan. 



D. S. Jordan, Oscar Sturges, C. M. Drake. 

 Northwest boundary survey, C. B. Kennerly. 

 F. W. Weymouth. 

 Calif. Acad. Sci. Coll., Ida Oldroyd. 



Do. 

 Bottom, rocks, shells; bottom temperature, 50.8" F 



Bottom, gray sand, broken shells. E 355 mm., 



r46 mm., br 58 mm. 

 CM. Drake. 



Stanford Coll., W. F. Weymouth. 

 Stanford Coll., W. F. Hamilton. 

 R. E. C. Stearns. 

 Stanford Coll., H. Heath. 



1 Many intermediates; all stages between troschelii and alveotata. 



EVASTERIAS ECHINOSOMA Fisher 



Plate 59, Figures 2, 2a-2h, 4; Plates 67-69 



Evasterias echinosoma Fisher, A New Sea Star of the Genus Evasterias, Proc. U. S. Nat 

 Mus , vol. 69, art. 6, 1926, p. 2, pis. 1, 2. 



Diagnosis. — Size large; rays five, long, tapering, stout, more or less swollen, 

 with a very convex abactinal, and a subplane actinal surface. Differing from E. 

 troschelii in having uniformly large, mostly subcorneal, well-spaced abactinal spines; 

 marginal plates unusually high on side of ray, the superomarginals being abactinal 

 in position and generally monacanthid ; six (or five) series of actinal plates (generally 

 inonacanthiti) of which either the upper row or the inferomarginals define the margin 

 of ray; adambulacral plates triplacanthid, or diplacanthid and triplacanthid. Type, 

 R 330 mm., r 51 mm., R = 6.4 r; br = about 60 mm. 



Description. — The abactinal surface is armed with rather widely spaced and nearly 

 uniform robust spines, cylindrical at the base, the distal half conical, longitudinally 

 sulcated, bluntly pointed, and in giant specimens with R 300 mm., about 2.5 mm. 

 long, by 1 to 1.5 mm. thick at the base. The distal part of the spine may be slightly 

 swollen so as to appear subcapitate. The spines of the distal portion of the ray are 

 round-tipped, and by a, shortening and rounding of the terminal conical portion a 

 subglobose, striated tip results. A majority of spines are so formed in specimens 

 from stations 3281 (2), 3291 (1), 3235 (1), none of which has R greater than 200 mm. 

 In the specimen from station 2842 the spines are slenderer than in the type, tapering, 

 and pointeil. The spines do not have regular arrangement. An irregular carinal 



