254 VERRILL 



four stout apical ones. Epioral spines numerous, six to eight in 

 each cluster. 



Radii of the type are 20 mm. and 55 mm. ; ratio, 2 : 2.75 ; rays ten. 



Northern Alaska. The type is from near Point Franklin, Arctic 

 Ocean, in 13^ fathoms (coll. Murdoch, Point Barrow Expedition, 

 U. S. Nat. Mus., No. 7624) . 



This form, which may prove to be a distinct species, is easily dis- 

 tinguished from typical S. dawsoni by the much finer and more 

 numerous spinules of the dorsal pseudopaxillae. They are only about 

 half as large, but nearly twice as numerous. The less projecting 

 adambulacral combs, the general presence of only two nearly equal 

 furrow-spines, and other less notable characters also serve to dis- 

 tinguish it. 



Professor Fisher records a specimen, from the same locality, as 

 S. dawsoni, which may be identical with this. The locality is far 

 more northern and arctic than any known for the true dawsoni. 

 My material is not sufficient for a positive decision as to its specific 

 distinctness. 



It is certainly more closely related to S. dawsoni than to 5". endeca, 

 though the latter is the common species of the arctic coasts, while 

 S. dawsoni is common from the Aleutian Islands southward to Cali- 

 fornia. 



SOLASTER STIMPSONI Verrill. 



Plate x, figures i, 2; plate xi, figures I, 2; plate xv, figures i, 2; plate XLVI, 

 figures i-ic (details) ; plate xciv, figure 2 (type) ; plate xcv (type). 



f Asterias decemradiatus BRANDT, Prod., p. 271, 1835 (no description). 

 Solaster stimpsoni VERRILL, in Whiteaves, Invert, of Queen Charlotte Is., 



Rep. Prog. Geol. Survey Canada, for 1878-79, p. 3; Whiteaves, Trans. 



Royal Soc. Canada, rv, p. 116, 1887. Fisher, op. cit, 191 ib, p. 311, pi. 



LXXXII, fig. 3; pi. LXXXIII, figs. 1-5. 

 ? Solaster decemradiatus STIMPSON, Journ. Boston Soc. Nat. Hist, vi, p. 89, 



1857 (no description). 

 Solaster vancouverensis DE LORIOL, Mem. Soc. Phys. Geneve, xxxn, part 2, 



No. 9 [P- 12], pi. i, [xvi], fig. 5, 1896. 



Disk of moderate width; rays elongated, usually ten, sometimes 

 nine. One of the type specimens has the radii of the disk 30 mm. ; 

 of the different rays, 100 mm. to 115 mm.; ratios, usually about 



i : 3-75-4- 



The rays are long, rounded above, regularly tapered, upper sur- 

 face thickly covered with pseudopaxillse composed of stellate clusters 

 of small, blunt, strongly divergent, webbed spinules, the larger ones, 

 on the rays, having usually five to eight spinules around the edge 



