224 VERRILL 



HENRICIA LEVIUSCULA, Var. ANNECTENS Fisher. 



Henricia leviuscula annectens Fisher, 1910, p. 572; 191 1&, p. 291, pi. lxx, 

 fig. 2d; pi. Lxxi, figs. 1-3. 



Intermediate between leviuscula and aspera, but superficially 

 more like the latter. Abactinal skeleton less open than in the latter, 

 with smaller, deep, papular areas. Ridges between papulae divided 

 into distinct pseudopaxillse, the larger with five to twenty short, 

 stubby spinules. Marginal plates more compressed than in levius- 

 cula, with comparatively few spinules. No intermarginals beyond 

 first two or three marginals. Interactinals extend to one-half or 

 two-thirds the length of the ray. Adambulacral plates bear ten to 

 twelve spinules in two transverse rows and one furrow-spine deep in 

 the groove, except near the tip of the ray, where there are two. 



Dr. Fisher records this form from thirteen localities in 21 to 73 

 fathoms, from Washington and Oregon to Santa Barbara, Cali- 

 fornia. 



Specimens agreeing very closely with it were in my collections 

 from California. The above diagnosis is condensed from that of 

 Dr. Fisher. 



HENRICIA LEVIUSCULA, Var. SPATULIFERA Verrill. 



Plate V, figure i; plate xiv; text-figure 12 (details). 



Henricia spatulifera Verrill, Amer. Naturalist, xliii, pp. 554, 555, fig. 6, 1909. 



The type of this peculiar variety is similar to an average well- 

 grown robust specimen of leviuscula, var. lunula, in size and form, 

 Radii, 13 mm. and 78 mm. ; ratio, i : 6. 



The chief peculiarity is in the armature of the adambulacral 

 plates. These bear a crowded group of about eight to twelve spin- 

 ules, in two close rows, which are remarkably large and flat, expand- 

 ing distally to broad truncate tips, which are often gouge-shaped or 

 grooved on one side. They are so large and crowded that they over- 

 lap each other and the adjacent plates, making it difficult to count 

 their number. 



The adoral and oral plates have the same sort of armature. This 

 kind of spinules extends to the tips of the rays, the size gradually 

 diminishing to minute spatulate forms near the tips, with the 

 exception of a limited section in the middle of one ray, where the 

 large, flat spinules cease abruptly and the following twenty-five 

 pairs of adambulacral plates all bear very small, short, slender 

 spinules in a crowded group of about fifty or more, in about four 



