ASTEROIDEA OF NORTH PACIFIC AND ADJACENT WATERS FISHER 21 



which the angle is the apex of the interbrachial angle, and the arms are the first mar- 

 ginal plates; proximal adambulacral plates not higher than long; gonads two or 

 four to each ray. 



The type, Brisinga panamensis Ludwig, is the only species known. The genus 

 has much the same relation to Stegnobrisinga that BrisingeUa bears to Brisinga, 

 with the exception of the gonads, which are two to each ray in Stegnobrisinga, and 

 two or four in Astrolirus. 



Genus FREYELLASTER Fisher 



Freyella Fisher (not Perrier), Ann. and Mag. Nat. Hist., ser. 8, vol. 20, 1917, p. 428. 

 Freyellaster Fisher, Ann. and Mag. Nat. Hist., ser. 9, vol. 2, 1918, p. 104. Type, 

 Freyella fecunda Fisher, Bull. U. S. Nat. Mus. 100, vol. 3, 1919, p. 537. 



Diagnosis. — Brisingidae with numerous gonads arranged serially along either 

 side of the more or less inflated genital region of ray, each opening by its own pore; 

 plates of genital region forming a continuous covering or armor, more or less spin- 

 iferous, and not segregated as independent skeletal arches, separated by intervals 

 without plates; no papulae; in interbrachial angle the first pair of adambulacral 

 plates (of adjacent rays) closely joined throughout their length, and directly above 

 them is a pair of closely joined first marginal plates; primary apical plates not con- 

 spicuous; a nonmuscular symphysis, or syzygy, between the first and second adam- 

 bulacral plates, and between the upper part of the second and third ambulacral plates. 



Remarks. — This group includes those species of the old genus Freyella in which 

 the gonads are numerous and arranged in series along either side of the ray, as in 

 typical Brisinga. In this restricted genus Freyellaster, as in the restricted Brisinga, 

 the first adambulacral plate is closely united to its fellow of the adjacent ray, at the 

 apex of the interbrachial angle; and immediately above them and joined to their 

 upper side is a closely apposed pair of marginal plates, the first of a series which 

 extends a variable distance along the base of the ray just above the adambulacral 

 plates. The adoral end of these marginal plates abuts against the base of the inter- 

 radial plate. In some species part of the second adambulacral plate, as well as the 

 first, is joined to its vis-a-vis. 



In addition to the California species, the following belong to Freyellaster: F. 

 spatulijer (Fisher), Macassar Strait; F. scalaris (A. H. Clark), Galapagos Islands; 

 probably F. polycnemus (Sladen). 



FREYELLASTER FECUNDUS (Fisher) 



Plate 3, Figures 1, \a-\f; Plate 7, Figure 2; Plate 9; Plate 12, Figure 1 



Freyella fecunda Fisher, Bull. Bur. Fisheries for 1904, vol. 24, June 10, 1905, p. 319. 

 Freyellaster fecundus Fisher, Ann. and Mag. Nat. Hist., ser. 9, vol. 2, 1918, p. 104; Bull. 

 U. S. Nat. Mus. 100, vol. 3, 1919, p. 538. 



Diagnosis. — Rays 13. R. 330 mm., approximately; r 13.5 mm.; R = approxi- 

 mately 25 r; greatest diameter of disk, 27 mm.; of elevated portion, 24 mm.; thick- 

 ness of disk, 5 mm.; diameter of ray at base, G mm.; at widest portion of genital 

 inflation (25 to 75 mm. from the base), 7.5 mm. Genital region very extensivo, com- 

 prising about half the length of ray, and not conspicuously inflated; plates thin, 

 delicate, beset with one to three small prickles, pretty evenly distributed, but more 



