SHALLOW- WATER STARFISHES 153 



there is another circle, and a spine of large size in the center. The 

 spines of the smaller kind, minute, slender, and truncated, are scat- 

 tered between the large ones. Minor pedicellariae are scattered in 

 considerable numbers between the spines, and form wreaths around 

 the bases of the larger ones. The major pedicellariae are very few in 

 number, small in size, and of rather slender form. Papulae numerous, 

 but not forming regular groups. Diameter, five inches. (Stimpson.) 



" A pretty and well-characterized species, related to A. epic Mora. 



" Habitat, Puget Sound. North West Boundary Commission. Dr. 

 C. B. Kennerly." (Stimpson.) 



Two nearly typical specimens were taken by the Harriman Expe- 

 dition at Yakutat. The larger of these is a dry specimen (a) (pi. 

 xxvi, figs, i, 2). It has the radii 18 mm. and 120 mm.; ratio, 

 about i : 6.6; breadth of ray at base, 21 mm. The other (&) has the 

 radii 19 mm. and 115 mm. ; ratio, about i : 6. 



In both these specimens the back is deeply areolated and reticulated, 

 the spines mostly standing in single rows around the papular areas, 

 but forming clusters at the principal intersections of the rows. Both 

 have the median dorsal band of spines distinct on the proximal half 

 of the ray, but quite indistinct distally, where the areolations become 

 closer and the spines much more crowded and clustered. The spines 

 in both are short and capitate, unequal in size, the larger ones sur- 

 rounded by a cluster of smaller ones, but in one specimen (a) the 

 larger spines are considerably larger than in the other, with sub- 

 truncate rough tips. 



In one specimen (b) the center of the disk is occupied by a pretty 

 regular figure, formed by five polygonal areas, bordered by spines, 

 and surrounded by ten other polygonal and triangular areas, with 

 others at the radial angles, thus forming a somewhat stellate figure. 

 But in the other specimen (a) this arrangement is obscured by the 

 crowding of the spines. 



The superomarginal spines form a well defined band, each plate 

 bearing one larger capitate spine, like the dorsals, and two to five or 

 more smaller spines of the same kind. There is a well defined lateral 

 channel which, in one of these specimens (&) bears one or two rows of 

 small spines distally, besides some large pedicellariae, but in the other 

 (a) these interpolated spines are almost all lacking. 



The inferomarginal row of spines is well defined and nearly regu- 

 lar. In one case (a) each plate generally bears only one spine proxi- 

 mally, but on the distal third of the ray there are mostly two equal 

 spines, close together. In the other example (&) nearly all these 

 plates bear two stouter and blunter spines, to the base of the rays. 



