1104 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
each bears a slender spinule, as in the type. The principal dimensions of the 5 specimens are as 
follows: 
Measurements of specimens of Zoroaster spinulosus. 
Station. 
Radius. 
Minor 
radius. 
Width of 
arm at 
base. 
Proportion 
of r to R. 
3892 
"Tl7 
mm. 
11 
m ”l2 
1:10.7 
4007a”! 
122 
10 
1:13.5 
4007b . . 
90 
8.5 
10 
1:10.6 
4112.... 
150 
10.5 
12 
1:14,3 
4139 
118 
8.5 
10 
1:13.8 
Color in life: Abactinal surface buff; actinal surface orange buff to orange within furrow. 
Localities: Type (no. 21187, U. S. National Museum) from station 3892, north coast of Molokai 
Island, 328-414 fathoms, fine gray sand; bottom temperature, 42.5°. Taken also at 4007, south coast of 
Kauai Island, 508-557 fathoms, gray sand and foraminifera; 4112, Kaiwi Channel, between Molokai 
and Oahu islands, 447-433 fathoms, fine sand; 4139, southwest coast of Kauai, 512-339 fathoms, gray 
sand and rocks; 5 specimens in all. 
The rays of this form are much slenderer than in the Z. diomedfe group and also longer. The 
species is particularly characterized by the armature of the adambulacral plates, by the absence of 
tubercles from the superomarginals, by the presence of 1 slender spinule on each of the superomar- 
ginals and on each plate between the latter and the adambulacral series. There are besides numerous 
pedicellarise on the general surface of the body, particularly in the neighborhood of the papular pores. 
Family HEUASTERID 42 Viguier, 1878. 
Heliasteridse Viguier, Anatomie du Squelette des Stell<Srides. <Arch. Zool. ExpiSr. et G6ner. t. vn, 1878, p. 111. 
Genus HELIASTER Gray. 
Heliaster Gray, Ann. N. H., ser. 1, vol. vi, 1840, p. 179. Type Asterias lielianthus Lamarck. 
Heliaster multiradiata (Gray). 
Asterias ( Heliaster ) multiradiata Gray , Ann. N. H., ser. 1, vol.vi, 1840, p. 180. 
This species is reported from the Hawaiian Islands (Sladen, Challenger Asteroidea, p. 556) , but 
was not secured by the Albatross expedition. I seriously doubt the validity of this record, as the 
habits of the species are such that it would not easily escape detection. 
Family ASTERIID 7 E Gray, 1840, emend. 
Asteriidse Gray, Synopsis of the Genera and Species of the Class Hypostoma ( Asterias Linnaeus), 
vol. VI, 1840, p, 178. 
Key to Hawaiian species of Asteriidse. 
<Ann. N. H., ser. 1 
a. Abactinal spines arranged in 3 definite longitudinal series, large and isolated, bearing thick wreaths 
of pedicellarise. Armature of adambulacral plates consisting of 2 spines. 
Coscinasterias ( Distolasterias ) euplecta 
aa. Abactinal plating forming a quadrate meshwork. The plates numerous, small, and imbricating by 
their 4 lobes, leaving open spaces through which protrude the single papulse. Each plate 
bears 1 to 3 small spinelets of uniform size and several crossed pedicellarise. Armature of 
adambulacral plates consisting of either 1 or 2 spines Hydrasterias verrilli 
Genus COSCINASTERIAS Verrill. 
Coscinasterias Verrill, Trans. Conn. Acad. vol. I, pt. 2, 1869, p. 249. Type, C. muricata— Asterias calamaria Gray. 
Stolasterias Sladen, Challenger Asteroidea, 1889, pp. 563, 583 (subgenus). 
The genus is here used not in the very restricted sense of Perrier (Exped. Travailleur et Talisman. 
Echinod. 1894, p. 108) , but as equivalent to the subgenus Stolasterias of Sladen (Challenger Asteroidea, 
1889, pp. 563, 583). It thus includes — besides calamaria — tenuispina, gemmifera, volsellata, stichantha, 
eustyla, glacialis, and other similar forms. 
Stolasterias Sladen (type Asterias tenuispina Lamarck) is antedated by Coscinasterias Verrill (type 
Asterias calamaria Gray) , and hence becomes a synonym of Coscinasterias as used in this broader sense. 
