112 BULLETIN 76, UNITED STATES NATIONAL MUSEUM 



of vuriety nguluris (1014, p. 130). He says: "The second short interactinal row of 

 ossicles bearing spines is not present, as it is usually in other varieties when of the 

 saint' size, and this is probably the cause of the slenderness of the ray." A second 

 -cries of actinal ossicles occurs in well-developed specimens of camtschaiica and 

 aeguoMs bu1 never in tbe dadkensis series, and never, so far as I have observed, in 

 TiacacHs. Yerrill more than once mistook young Evasterias for 5-rayed examples of 

 some of his varieties (as, var. sulmodulosa 1014, p. 130). These have regularly two 

 -cries of actinals. Yen-ill's Leptasterias macouni is an Evasterias. 



Tbe largest spe< imens which I have seen were collected by Mrs. Ida S. Oldroyd 

 at Friday Harbor, San Juan Islands, Wash. (pi. 52, fig. 3). Eays medium slender 

 to medium robust; R 30 mm., r 12 mm.; ray width to 11 mm.; rays rather blunt 

 and stubby, sometimes inflated. Abactinal spinelets, stout, subcylindrical to sub- 

 capitate truncate, arranged in irregular broken reticulum, the carinals forming an 

 irregular multiple series -three to six spinelets per plate; dorsolaterals two or three 

 to six to a plate. Papular areas in the equivalent of six abactinal longiseries, only 

 those above superomarginals being at all regular; three to six abactinal papulae 

 to an area. 



Supermarginal spinelets two, sometimes three to a plate proximal ly, sporadically 

 one. Inferomarginals proximally one, then two; actinals one, these forming a trans- 

 verse comb of two or three with the inferomarginals. They are subcylindrical or 

 tapered, blunt, sometimes upturned at end. Adambulacrals with one spinelet except 

 near base of ray where for a short distance there are one and two. Oral plates with 

 one actinostomial spinelet a little shorter to a little longer than plate and one suboral 

 a trille longer than proximal adambulacral spinelets. 



Straight pedicellariae ovate or triangular ovate, compressed, the end of jaw 

 with sometimes two or three denticles. Good sized ones measure 0.4 to 0.5 mm. 

 Crossed pedicellariae not very abundant, the abactinal 0.2 to 0.22 mm. long. They 

 are not particularly diagnostic. (PI. 44, fig. G.) 



Three specimens from the vicinity of Victoria have mostly monacanthid supero- 

 marginals, while the others have two or three spinelets. The straight pedicellariae 

 are sporadically larger, or more numerous, in certain specimens. Such examples 

 formed the basis for Verrill's Leptasterias epiclilora pugetana. 



Type of forma regularis. — In Yale Museum. 



'/'///" locality oj jorma regularis. — Cape Fox, Alaska (opposite Dixon Entrance). 



Distribution. — Puget Sound and Vancouver Island to Cooks Inlet. The northern 

 examples are less spinous than the southern and less easy to differentiate from aspera 

 which predominates in the north. 



Forma SIDEREA Verrill 



Plate 44, Figures 2, 2a; Plate 51, Figure 1; Plate 52, Figures 1, 2; Plate 54, Figure 6 

 l.i ptnsterias epichlora alaskensis var. siderea Verrill. 



Diagnosis. Differing from forma regularis in having still more numerous abac- 

 tinal spinelets which are usually crowded into an areolated pattern; superomarginal 

 spinelets t\ U) or three as against usually one of northern examples of regularis; 

 straight pedicellariae small lanceolate or ovate lanceolate. 



