Genera and Species of Brisingids. A421 
slender, acicular; the acces- 
sory subambulacral spine, if 
present, is on the adoral half 
of the plate; adambulacral 
armature is not dense and 
crowded. Genotype, Brv- 
singaendecacnemos, Ashjprn- 
g’. Subambulacral spines of proxi- 
mal adambulacral plates with 
modified, capitate, often trun- 
cate tips; second subambu- 
lacral spine regularly present, 
prominent, and near the ab- 
oral end of plate ; adambu- 
lacral plates short, with 
crowded armature. Geno- 
type, Brisinga panopla, 
Biche toc. s a. os cus eee 
Brisinga, Asbjprnsen. 
Craterobrisinga, Fisher. 
f?. Gonads two to each ray (one 
on each side); subambulacral 
spines all delicate and acicular. 
g. The interradial (first) pair of 
adambulacral plates is joined 
by the interradial faces, and 
above them is a united pair 
of first marginal plates—four 
in all (figs. 3and 4). Geno- 
type, Brisinga moluccana, 
BIGNED. F535 4 a edhe 
g°. The interradial (first) pair of 
adambulacral plates 1s not 
joined, but separate, the outer 
end of the combined mouth- 
plates being usually inter- 
polated between the inner 
ends of these adambulacral 
plates ; first pair of marginal 
plates is not closely united 
by the interradial faces, but 
only by the adoral ends, to 
which also is closely united 
the lower end of the inter- 
radial plate, forming a rude 
reversed Y, of which the 
angle is the apex of the in- 
terbrachial angle and the 
arms are the first marginal 
plates (figs. 5 and 6); ad- 
ambulacral plates slender, 
Astrostephane, Fisher.* 
* Includes also Astrostephane acanthogenys (Fisher), from 172 fathoms 
off Lingayau Gulf, Luzon. 
The type is from 265 fathoms between 
Gillolo and Kayoa Islands, Molucca Islands. (Fisher, Proc. Biol. Soc. 
Washington, vol. xxix. p. 38, Feb, 24, 1916.) 
