STARFISHES OF THE PHILIPPINE SEAS. 517 



Description. — The disk is very similar to that of eucoryne^ but the 

 spinelets are a trifle shorter, a character which may or may not be 

 constant. The costal region extends a little over half the length of 

 the ray instead of a third, and there are about 35 costae, 1 or 2 at 

 the base of the ray being incomplete and the last 10 very slender, 

 but complete. The costae on the main swollen portion of the costal 

 region are closer together than in eucoryne^ more regular, and more 

 nearly parallel. Two adambulacral plates, each with a rib opposite, 

 are followed by a plate without a ridge ; then come two ridges close 

 together: then may follow 2 costae opposite alternate plates, and 

 so on. There is much variation, but beyond the fifteenth or six- 

 teenth costa they occur only opposite alternate plates. The proximal 

 lateral spines seem to be a trifle weaker than in eucoryne. 



The adambulacral armature is very similar to that of G. eucoryne^ 

 with the exception that there is never an adoral subambulacral spi- 

 nule in addition to the adoral furrow spinelet. The adoral furrow 

 spinelet in analoga is probably really an actinal spinelet moved to 

 the furrow margin. The furrow spinelets are a little less to a little 

 more than the length of the plate. The second subambulacral is a 

 little stouter and more often truncate on the first dozen plates than 

 in eucoryne. 



The pedicellariae are similar to those of eucoryne, but are a trifle 

 narrower. 



Type.—C2it. No. 37034, U.S.N.M. 



Type-locality. — Station 5348, Palawan Passage, 375 fathoms, coral 

 sand ; bottom temperature, 56.4° F. ; one specimen. 



Distribution. — Known only from the type-locality. 



Remarks. — The specimen upon which this species is based was in 

 the same bottle with two of C. eucoryne. B. parallela holds a some- 

 what analogous position with reference to C. panopla., both analoga 

 and parallela differing from their near relatives in having more 

 regular and more nearly parallel costal arches. B. analoga is at 

 once separable from both panopla and parallela in having tegumen- 

 tary prickles and much fewer costae. 



Genus BRISINGENES Fisher. 



Brisingenes Fisher, 1917/, pp. 419, 427. Type, Brisinga mimica Fisher. 



Diagnosis. — Closely similar in appearance to typical Brisinga, but 

 differing in having on the margin of disk, directly over the first pair 

 of enlarged ambulacral plates of each ray, a pair of papulae. There 

 is thus a circle of these papulae, twice as numerous as the number of 

 rays, and the papulae of each pair are separated slightly less than 

 the space between the pairs. Gonads numerous, in close series on 

 either side of each ray; first adambulacral plate and first marginal 

 13434— Bull. 100—19 34 



