JAPANESE ASTEKOIDEA. 353 



series surrounding pLites and ending in an abrupt usually sharp point, 

 instead of being rounded. Abactinal pedicellariœ, numerous, large, as high 

 or liiglier than broad, and wider at top than at base ; edge of jaw undulat- 

 ing or slightly denticulate. Papulae numerous, all over abactinal sm-face except 

 a veiy naiTow inteiTadial band. Superomarginals tumid, ten to twelve to 

 each ray, each plate with two, and inferomarginals with one or two stout 

 conical spines, and in addition a single row of pointed marginal gi'anules. 

 Pedicellarise, higher than wide and with denticulate jaws smaller than those of 

 abactinal surface, are scattered here and there, usually on the lateral face of 

 the plates. Such pedicellariae do not occur in typical s2yinosa. 



" Actinal surface with numerous pedicellarife having higher jaws than 

 in leiopelta. A prominent series occurs on the row of intermediate plates 

 adjacent to the adambulacrals. The dimensions of these pedicellariœ are 

 variable in typical spinosa. The actinal granules are similar in distribution 

 to those of spinosa, but often (though not always) have several points, or 

 only one point, rather than a simple low conical form. They are, therefore, 

 somewhat similar to those of H. californica. Many of the plates have one 

 or two low thimble-shaped tubercles in the centre, in place of pedicellanse. 



" Usually the adorai furi'ow spine is the shorter of the two, and both 

 are strongly compressed at tlie blunt tip. The adorai spinelet is sometimes 

 wanting on the outer part, or along most of the ray. Actinal spine shoiier 

 than the longer fmTow spine and usually compressed at the base in a plane 

 parallel to furrow. The outer part of -çhÀe, is covered with granules. 

 Mouth spines four, strongly compressed, chisel-shax^ed ; usually but one 

 suboral standing near margin, and in line with the marginal spines. 



" Type.—C^i. No. 27885, Ü. S. N. M. 



" Type-locaJity. — Albatross station 4840, off Simusliir, Kmil Islands,. 

 229 fathoms, coarse pebbles, black sand. 



" Distrilndion. — Known only from the vicinity of Simushir. 



" Specitnens examined. — Eight ; from type locality fom-, and from station 

 4803, same locahty, depth, and bottom, fom-. (Albatross, 1906.) 



" Bemarhs. — Tliis race differs considerably in general appearance from 

 typical spinosa of the North American coast, as the photogi-aph of the tj-pe- 



