THE STARFISHES OF THE HAWAIIAN ISLANDS. 
1091 
ing spinelets, arranged with 1 on furrow margin and 2 behind in an oblique or longitudinal series; or 
when there are 4, 1 on margin, followed by 1 directly behind it, and the two outer in an oblique 
series. Occasionally the 4 are grouped on the inner half of plate, without definite order. On outer 
part of plate there is a group of 7 to 10 much smaller, subclavate spinelets, slightly larger than those 
of adjacent actinal intermediate plates. They are well spaced, and increase in length toward furrow. 
Further along ray the arrangement is usually 1 spinelet on the furrow edge and behind it, 2, a trifle 
shorter, in a longitudinal series. A fourth spinelet is sometimes present, external to these. On the 
outer side of plate are 5 or 6 unequal, smaller spinelets, their bases united by membrane. 
Madreporic body of medium size, circular, situated at the summit of an interradial sulcus. Stria- 
tions few, coarse, radiating, with wide sulcuses between the ridges. The latter are studded with 
numerous spinelets, like those of neighboring plates. Anal opening eccentric, prominent. 
Color in life, a soiled cream color. 
Locality: Type (no. 21181, U. S. National Museum) from station 4115, northwest coast of Oahu 
Island, 195-241 fathoms, coral sand, foraminifera; bottom temperature 55.1°. 
This species is characterized by its thick, short rays, and generally robust form, by the uncrowded 
condition of the plates which form a network, by the numerous delicate spicules forming groups on 
these plates, and by the adambulacral armature. The species is most nearly related to Henricia obesa 
(Sladen) from the Falkland Islands and Straits of Magellah, from which it differs in details of its 
spinulation and in the armature of the adambulacral plates. The spines of the body are much more 
delicate in robusta than in obesa, and are more numerous. 
Henricia pauperrima, new species. 
PI. xxxv, figs. 3, 4; pi. xxxvm, fig. 3, 3a-b. 
Rays 5. R=61 mm.; r=9 mm. R=6.7 r. Breadth of ray at base, 9 mm.; at 10 mm. from base, 
6 mm. Rays unequal, the shortest (possibly mutilated) 40 mm. , 
Rays long and very slender, cylindrical, tapering continually from a narrow base to a prolonged, 
bluntly pointed extremity. Disk fair sized, somewhat inflated. Interbrachial angles obtuse or 
rounded. 
Plates are larger and more crowded than in the foregoing species. They are small and form a 
close network which is very irregular. Abactinal surface, however, appears quite porous, the plates 
being in nowise so crowded as in leviuscula or sanguinolenta. Papulae are large and isolated, sur- 
rounded by small plates, which bear 8 to 12 minute, very delicate and sharp, well-spaced spinelets. 
These are much more delicate than those of last species and can not be distinguished without a glass. 
Smaller plates may bear only 4 or 5 spicules, which, however, are always spaced, not in compact 
groups. 
Adjacent to the adambulacral plates is a series of plates slightly larger than the lateral and 
abactinal plates, and like them bearing delicate spinelets. On the outer two-thirds of the ray a con- 
tinuous series of smaller (superomarginal?) plates is present, and between the 2 is a very definite line 
of papulae which extends to mouth angle. Actinal interradial plates are rather larger than abactinals. 
Adambulacral plates are rather large, only a trifle broader than long. Armature as follows: 
(1) 2 delicate, slender spinelets, placed one above the other high on furrow wall, the upper being at 
apex of plate. (2) On actinal surface 3 rather long, slender spinelets, spaced on edge of furrow, 1 in 
the center being longest. Just behind these, at the base of ray, 2 to 4 additional spinelets often stand 
in a longitudinal row, and occasionally farther along the ray there will be 1 or 2 much smaller spine- 
lets. The outer two-thirds of the plate is covered with 10 to 15 delicate, minute, well-spaced spinelets 
or spicules, similar to those arming other plates of the body. 
Madreporic body fairly large, with a few coarse, irregular, narrow ridges separated by deep sulcuses. 
Ridges bear minute spinelets. Body is situated nearly midway between center of disk and margin 
when the specimen is viewed directly from above. 
Color in life, very pale greenish-gray or dirty white; ambulacral furrows darker greenish-gray. 
Localities: Type (no. 21182, U. S. National Museum) from station 4166, vicinity of Bird Island, 
293 to 800 fathoms, coral sand, foraminifera, rocks; bottom temperature 45.6°. A young specimen 
probably belonging to this species was taken from 4044, west coast of Hawaii, 233 to 198 fathoms, 
fine gray sand. 
