428 Mr. W. K. Fisher on new 
with thin disk and deciduous, slender, flexible rays, thin 
delicate aes integument, and very fragile spines. 
Differing trom B. ewxilis in having 25 to 30 coste which 
extend at least three-fourths the length of ray, comparatively 
few, widely spaced, embryonic, abactinal disk-plates bearing 
1 or occasionally 2 small spinelets, a narrower, keeled, inter- 
radial plate ; second ambulacral ossicle more than half as 
long as the first, measured on the summit of the ridge ; 
furrow spinelet absent beyond the proximal 3 to 14 adambu- 
lacral plates. 
Type-locality—‘ Albatross’ station 4427, off Point San 
Pedro, Santa Cruz Island, California, 447 to 510 fathoms, 
black mud. 
Genus STEGNOBRISINGA, Fisher. 
Stegnobrisinga, Fisher (subgenus), New East Indian Starfishes, Proc. 
Biological Soc. Washington, vol. xxix. p. 33 (Feb. 24,1916). Type, 
Brisinga (Stegnobrisinga) placoderma, Fisher. 
Diagnosis—As given in foregoing synopsis. 
‘The numerous prominent coste will at once separate this 
genus from Freyella and Freyellidea. ‘he genus Astrolirus 
differs in having the first adambulacral plates and _ first 
marginal plates arranged as in Brisingella, and in having 
slenderer adambulacral plates, which, proximally, are not 
higher than long. 
Brisinga gracilis, Koehler, may be a Stegnobrisinga, but 
certain necessary anatomical details are not yet known—for 
example, the number of gonads. 
ASTROLIRUS, gen. nov. 
Diragnosis.—As given in foregoing synopsis. 
The type, Brisinga panamensis, Ludwig, is the only species 
known. The genus has much the same relation to Stegno- 
brisinga that Lrisingella bears to Brisinga, with the exception 
of the gonads, which are two to each ray in Stegnobrisinga, 
and two, or as many as four in very large examples, in 
Astrolirus. 
Genus FREYELLA, Perrier, restricted. 
Freyella, Perrier, Ann. sci. nat., Zool. vol. xix. art. 8, 1885, p.5. Type, 
Freyella spinosa, Perrier, first species. 
Diagnosis.—As given in foregoing synopsis. 
‘This group includes those species of the old genus Freyella 
in which the gonads. are numerous and arranged in series 
