A. E. Yerrill — New Genera and Species of Starfishes. 63 



longer ; those near the interradial angles are flattened and 

 enlarged distally ; the valves at the peractinal pores between 

 their bases are very acute, small, and slender. 



Departure Bay, Br. Columbia, 23 fathoms, mud and sand, 

 1908 (C. H. Young), Canada Geological Survey. 



Hippasteria spinosa Ver., sp. no v. 



Very similar in form and size to H. flirygiana of the N. 

 Atlantic, but thickly covered with large, tapering, acute spines, 

 usually one to nearly every dorsal plate and 1 to 3 on each 

 marginal. Many of the plates also have large elevated bivalve 

 pedicellarige, but not so wide as in phrygiana. 



Departure Bay, British Columbia, 18 fath. (H. C. Young), 

 Canada Geol. Survey ; Puget Sound (Prof. Kincaid). 



Tosia arctica Ver., sp. nov. Figures 8, 8a. 



Pentagonal with short obtuse rays. Disk thick ; margins 

 rounded. Kadii 31 and 48 mm . 



Dorsal plates, when granules are removed, are mostly ellip- 

 tical or rounded, well spaced ; granules are angular and coarse, 

 and those of adjacent plates are in contact in alcoholic speci- 

 mens, so that the plates mostly appear hexagonal or penta- 

 gonal ; there are usually 6 to 8 marginal and one central 

 granule on the larger plates ; some have, also, a bivalve 

 pedicellaria about equal to a granule in size. Marginal plates 

 not very large, closely and coarsely granulated ; the distal ones 

 become less regular, partly rounded, and small. Plates of 

 lower side uniformly coarsely granulated. Adambulacral 

 plates have two short, thick furrow spines and five or six on 

 outer part, often with a pedicellaria of similar size. 



Bering Island (N. Grebnitsky, 1889). U. S. Nat. Mus. 

 Type. 



Asterias (Pisaster*) papulosa Ver., sp. nov. 



A very large 5-rayed species, with a high, swollen disk and 

 long tapered rays. Badii of a medium-sized specimen, 42 

 and 210 mm ; Tatios, 1:5; rays, 45 mra broad at base, 43 mm high. 

 A larger specimen is 660 mm broad. 



The dorsal spines are few, short, thick, tapered, subacute ; 

 they form simple median radial rows ; others are irregularly and 



* This subgenus, or perhaps more correctly genus, first indicated by Mull. 

 and Tr. (type P. ochraceus), has monacanthid adambulacral spines and 

 remarkably large sessile denticulate pedicellarise, and usually, in the adult, 

 numerous rows of actinal plates and spines. P. papulosus is an exception, 

 as to the last character. It includes, also, P. fissispina, P. confertus, P. 

 Lutkeni, P. capitatus, P. brevispina and P. giganteus, all described by 

 Stimpson from the N. P. coast. 



