SHALLOW-WATER STARFISHES 24! 



HENRICIA LONGISPINA Fisher. 



Henricia longispina FISHER, op. cit, 1910, p. 572; iQiib, p. 299, pi. LXXVI, 

 figs, i, 2 ; pi. cxi, figs. 3, 30. 



Rays five, moderately slender, cylindrical. Radii of type, 9 mm. 

 and 47 mm. ; ratio, i : 5.2. Dorsal ossicles are stout and form a 

 rather coarse and open reticulation. Spinules are spaced in fascicu- 

 late groups of two to nine, mostly five to seven, unusually long for 

 the genus, up to i mm. to 1.5 mm., acute and finely denticulate. 

 Marginal rows of plates fairly regular, not very large, each with six 

 to nine spinules. The inferomarginal spines are a little the larger; 

 somewhat transversely elongated; two or three intermarginal rows 

 of small plates proximally, the longest extending to one-half to two- 

 thirds the length of the ray; interradial plates small, extending to 

 about half the length of the ray, with two to four spinules. Papulae 

 exist between the interactinal and adambulacral plates, as in most 

 species of the genus. Adambulacral plates have one saber-shaped 

 furrow-spine; on the actinal margin a long, tapered spinule with 

 two smaller ones seated back of it, followed by three or four smaller 

 and shorter, acute, graded spinules, the whole series forming a 

 zigzag or irregular transverse row. The adambulacral spines are 

 longer than any others. 



Color in life, milk white. 



The type was from Queen Charlotte Sound, off Vancouver Island, 

 in 68 to 107 fathoms, soft mud. The only other locality is Naha 

 Bay, Behm Canal, southern Alaska, in 41 to 134 fathoms, gravel. 



The description is abridged from that of Professor Fisher. 



HENRICIA ASPERA Fisher. 

 Henricia aspera FISHER, op. cit, 191 ib, p. 293, pi. LXXV, figs. 1-5. 



Stellate, usually with five long, slender rays. Radii of type, 

 15 mm. and 100 mm.; ratio, about 1:6.6; sometimes 1:7.2, and 



i : 5-3- 



Dorsal plates openly reticulated, the spinules not grouped into 

 evident pseudopaxillae, but short, granule-like and nearly continuous 

 over the lines of ossicles around the papular pores ; the meshes and 

 papular areas rather large, each with several, five to twelve, papulae 

 in adults. Spinules stout, sharp, not crowded, often obscured by 

 membrane; the rows often interrupted. 



Marginal plates in regular rows, the upper ones usually a little 

 smaller, spinules about ten to twelve to a plate. Interactinal plates 



17 



