ANNOTATED LIST. 45 
times the diameter of adjacent granules.” The arrangement of the abactinal plates of 
the rays proximally, in regular longitudinal series, would appear to be another good dis- 
tinctive character. The only known specimen of this interesting species was taken by the 
Albatross in 24 fathoms, in the vicinity of Siasi, Sulu Archipelago. It has R=41 mm. 
Fromia hemiopla. 
Fisher. 1913. Proc. U.S. Nat. Mus., 46, p. 213.—1919. Bull. 100 U. S. Nat. Mus., p. 377; pl. 95, fig. 3; pl. 105, 
fig. 2; pl. 106, fig. 3; pl. 107, figs. 2, 4. 
The Albatross took this well-marked species at Tonquil Island, Gumila Reef, south 
of Zamboanga, Mindanao, in the Philippines. Dr. Fisher has seen the type of the following 
species (hadracantha) and thought it was probably hemiopla, so it has seemed to me unrea- 
sonable to separate them widely. But his figures show that the actinal papule are better 
developed than in hadracantha and one might be led thereby to look for hemiopla in the 
previous section of the genus near pacifica. The type of hemiopla has R=36 mm. 
Fromia hadracantha! sp. nov. 
(Plate 31, Figures 3 and 4.) 
R=30 mm.; r=6 mm.; br=6 mm. R=5rand also 5br. Abactinal surface flat; 
rays narrow, tapering, with vertical sides, nearly 2.5 mm. high. Abactinal skeleton made 
up of more or less nearly circular plates, the largest about 1.5 mm. in diameter; on each 
ray are 3 fairly regular longitudinal series but the lateral series are of smaller plates than 
the median; the plates of the lateral series alternate with those of the median, and only 
the latter reach the tip of the ray; whole abactinal surface covered by a very fine granula- 
tion, 80 to 90 granules to the square millimeter; the granules around the papular pores are 
larger than those near center of plates. Superomarginals 15 or 16, decreasing in size 
distally, quite uniformly longer than wide, except at base and near tip of ray; beginning 
on the seventh there is a minute tubercle which becomes more conspicuous on the last 
plate or two where it is also accompanied by a few granules, coarser than usual, but never 
conspicuous. Terminal plate rather large, truncated conical, bare, except that the basal 
part is encroached on by the fine abactinal granulation and the tip carries 6 to 8 tubercle- 
like granules. Inferomarginal plates 18 to 20, not corresponding well to the superomar- 
ginals, but of about the same size, except distally; beginning on the eleventh, the granules 
at center (or distal to it) are coarse and soon one may be called a tubercle; on the distalmost 
plates, there are 2 or 3 of these tubercles, but one is usually larger than the others. Actino- 
lateral plates greatly reduced, the series adjoining the adambulacral extends to middle 
of ray or beyond, but the second series consists only of an unpaired interradial plate with 
3 much smaller plates on each side. Granulation on actinolateral plates no coarser than 
on marginals. Papule abundant and conspicuous above, extending to tip of ray, but few 
and small actinally and between the marginals; on each side of a ray one can find 6 to 9 
actinal papule, adjoining the inferomarginals and there are about as many along the upper 
margin of the same plates. No pedicellarie anywhere. Madreporite moderate, slightly 
convex, separated from the superomarginals by less than its own breadth. 
Adambulacral plates moderate, averaging about 2 to each inferomarginal. Armature 
of 2 (rarely 3) thick, blunt, subequal furrow spines which are not at all broad or flat or 
spatulate; 1 conspicuous subambulacral spine, much wider, stouter, and sometimes longer 
than furrow spines, occasionally accompanied by a second much smaller spine or high 
tubercle; and a few granules like those on the actinolateral plates, only 1 or 2 of them are 
somewhat larger. Oral plates with 3 or 4 marginal spines, longer, more cylindrical and 
more pointed than the furrow spines, and 1 or usually 2 suboral spines a little smaller than the 
1 édpé¢ =stout; dxav8a=spine, in reference to the very stout subambulacral spines. 
