572 



smaller than exposed surface of adambulacrals and extending nearly 

 to end of ray (about ^/s). Intermargmal iplatesopresent, but variable 

 sometimes confined to base of ray, sometimes extending in 1 or 2 series 

 half the length of ray. There is. evidence that this form intergrades 

 with Jeviuscula: . . 



Henricia Icvliiscula anuectens new subspecies. 



Intermediate in general appearance between H. leviuscula and H. 

 aspera^ but superficially more like asjjera; rays slender, disk small; ab- 

 actinal skeleton less open than in aspera ^ with smaller, deeply sunken 

 papular areas; ridges enclosing papular areas not undivided as in aspera 

 but subdivided by spine-bearing tabulae; latter with comparatively few 

 (5 to 10) short tapering stubby spinelets in 2 or 3 rows: 1 to 3 papular 

 pores to an area; marginal plates shorter and much more compressed 

 than in leviuscula., with comparatively few spinelets, the spine bearing 

 ridge of the 2 series being sometimes confluent; successive ridges 

 separated by a prominent transverse groove; no intermarginals beyond 

 first 2 or 3 marginals; actinal intermediate series extending only part 

 way along ray ('/2 to 2/3) as in aspera, not the whole length as in 

 leviuscula; adambulacral plates with 10 to 12 spinelets in 2 transverse 

 rows, and deep in the furrow 1 spinelet except near tip of ray where 

 there are two. 



Off Oregon, 42 fathoms. Bottom, rocks stones. 



Henricia asthenactis new species. 



General appearance somewhat like that of young aspera., but the 

 abactinal and lateral skeleton more open and weaker, the papular areas 

 being proportionately much larger and the spinelets scattered, few, and 

 conspicuously longer; adambulacral spinelets long, and in a single trans- 

 verse series (4 to 6 in number counting the spinelet in furrow); 2 regular 

 series of plates adjacent to adambulacrals separated by a row of single 

 papulae. R 22 mm; r 5 mm; R 4,4 r. 



Between Santa Barbara and San Nicholas Islands, California, 

 339 to 216 fathoms. Bottom, green sand, shells. 



Henricia longispina new species. 

 Rays 5, moderately robust, constricted at base, cylindrical, tapering 

 gradually to a very blunt, recurved extremity; disk small, slightly in- 

 flated : skeleton forming fairly coarse meshwork with stout plates and 

 irregular mostly quadrate or roundish , though often irregular papular 

 areas; with rather numerous papulae to an area ; spinelets in well defined, 

 spaced, fasciculate groups of 2 to 9 (usually 5 to 7) and 1 to 1,5 mm 



