124 DISCOVERY REPORTS 



deciduous subspherical granules, the largest of which are slightly larger than the peri- 

 pheral, the smallest (more round-tipped cylindrical to thimble-form) decidedly smaller 

 than the peripheral. A majority of these granules have been rubbed off the plates. Here 

 and there is a small tongs-shaped pedicellaria arising from a depression of the plate. The 

 jaws are spatulate, constricted at middle, and about 0-5 mm. wide by 0-5 mm. high. The 

 large flat madreporite is one-third r from centre ; diameter 5 mm. Papulae very small, 

 apparently about 6, around plates of radial area. 



The marginal plates are block-like, wider than long, convex, and form a thick, rounded 

 border. Both series regularly diminish in size distally. Superomarginals 11, the last 

 plate of one series meeting i or 2 of opposite side of ray medially. The plates are 

 bordered by squarish granules similar to the abactinal while the surface is covered with 

 very deciduous, slightly spaced, subspherical granules which increase in size to small 

 tubercles in centre of plate, especially toward end of ray. The inferomarginals are 

 similarly provided with granules which are slightly more uniform in size. 



A single row of actinal plates extends the length of 5 or 5I inferomarginals; the next 

 row, 2 1 or 3 ; the third, 2 ; the fourth, i| ; while the remaining 2 chevrons are in the span 

 of the interradial pair of plates. The actinal plates are rather ornate with 1-3 central 

 granules ; or, on inner 3 series, a central broadly spatulate pedicellaria, with jaws about 

 twice the height and breadth of the abactinal. The peripheral granules are regularly much 

 larger on the side toward margin and end of ray. 



The adambulacral armature is essentially that of Hippasteria, consisting of 2, some- 

 times 3, heavy, compressed, round-tipped furrow spines about as long as width of plate. 

 On centre of plate is a much heavier subcylindrical round-tipped tubercle (with a smaller 

 adoral companion on first 4 or 5 plates). Near outer end of plate is a tapered tubercular 

 spine about half as long, or sometimes 2, side by side. The margin of plate (except the 

 furrow) is occupied by prismatic granules like those of adjacent actinah, which elongate 

 into coarse prismatic spinelets toward furrow. I find only one subambulacral spatulate 

 pedicellaria. Marginal oral spines 6, coarse, compressed and prismatic; suborals 

 crowded, about 6 to an oral angle. 



Type locality. St. WS 86. Falkland Islands, 53° 53' 30" S, 60^ 34' 30" W, 151- 

 147 m., shell and stones, i specimen. 



Remarks. This species is very closely related to C. validus Fisher^ from Amukta Pass, 

 Aleutian Islands, 52° 06' N, 171° 45' W, 283 fathoms, rocks, black sand, hydrocorals. 

 The only known specimen of validus has R 17 mm., r 10 mm., and is probably young. 

 It diff^ers from analogus in minor details such as a definite tumid naked area on the supero- 

 marginals. Although most of the superomarginals of analogus have lost their granules, 

 the scars are discernible and there appears to be nothing like a specialized area. In 

 analogus the madreporite is larger than any abactinal plate; in validus it is distinctly 

 smaller than the radials, although this may well be associated with immaturity. In 

 validus the pedicellariae are abactinally a trifle larger (relative to size of plate) than in 

 analogus and the jaws have more distinctly incurved ends. The actinal pedicellariae of 



1 Fisher, 191 1, p. 222, pi. 41, figs, i, 2. 



