NEW STARFISHES FROM THE PACIFIC COAST 1 39 



Adambulacral plates placed obliquely as in Pycnopodia hclian- 

 thoidcs, but not so crowded. They are not sunken within fur- 

 row as in that species, but are on same level with inferomar- 

 ginal plates and define true margin of furrow. Each plate 

 bears a single spinule, slightly shorter and much slenderer than 

 inferomarginal spine. No pedicellarice on either spines or 

 plates. 



Mouth plates small, each with a marginal spine pointing 

 across mouth of furrow, another over actinostome, and usually 

 2 upright spines, subequal to furrow spines, on actinal surface 

 near suture — i placed behind the other. Furrow spines may 

 bear i or 2 small forficiform pedicellariae but usually they do 

 not; several, instead, being found on inner angle of plate. 



Ambulacral furrow wide and shallow ; ambulacral plates not 

 so crowded as in Pycnopodia Jielianthoides. Ambulacral pores 

 in 4 rows, except at very base of furrow, and on terminal third 

 or fourth of ray, where there are but 2 rows. Tube-feet large, 

 rather crowded. At base of furrow they are very evidently in 

 only 2 rows and resemble those of Brisinga. Soon the plates 

 become a little more crowded and a not very marked quadri- 

 serial arrangement of the feet then becomes evident. Actino- 

 stome very wide, 24 mm. on a disk 44 mm. in diameter. 



Madreporic body small, situated near interradial angle; dis- 

 tant about its own diameter from edge of disk. Striations 

 radial. 



In this species the gonads open to the exterior near base of 

 rays. There is one gonad on either side of ray, much as in 

 Pycnopodia. 



Type, No. 21934, U. S. Nat. Mus. Type locality, Alba- 

 tross Station 2925, off San Diego, Cal., in 339 fathoms, on 

 mud. 



