THE STAEFISHES OF THE HAWAIIAN ISLANDS. 
1083 
and adambulacral plates are 3 series of regular actinal intermediate plates, but beyond the twelfth 
inferomarginal or basal third of ray' there are but 2 such. There are 8 rows of papular areas, the 
actinal row (between inferomarginal and outer actinal intermediate plates) ending within 10 to 15 
mm. of the interbrachial arc. This series contains but 2 or 3 pores to the area, and is not sunken in a 
furrow, as the marginal and dorsal areas, which comprise 4 or 5 pores, usually 4. The plates are 
covered, as in the 2 preceding species, with a membrane closely beset with fine granules. This skin 
is thinner than in sclerodermus and the granules are relatively considerably larger, yet fine, being 
■ coarsest on the convexity of the plates and only one-fourth or one-third as coarse in the bottom of the 
papular furrows. The granulation becomes very gradually coarser on actinal intermediate plates, yet 
is relatively (to the size of the spinelets) finer immediately adjacent to furrow than in tenellus, since 
the granules again grow smaller as they surround the actinal furrow spinelets. Here and there on the 
abactinal plates, and on the papular areas of intramarginal series, as well as on the actinal intermediate 
plates of proximal portion of ray, are small “spectacle-shaped” pedicellarise, occurring singly, similar 
to but smaller than those of sclerodermus. The figures will sufficiently show the form. On proximal 
portion of the ray a short series of them occurs just exterior to the actinal furrow spinelets. The jaws 
rest in similarly shaped specialized fossse, as in the 2 preceding species. 
The furrow spinelets are similar to those of the 2 preceding species. There are 2 to a plate, and 
the tip is rounded or subtruncate, projecting well above the general surface. The actinal adambula- 
cral spinelets are also flattened and obovate in outline, bent away from the furrow. They very' nearly, 
-or quite, touch the furrow spinelets, only 1 series, if any, of fine granules intervening. (Compare 
figure with sclerodermus.) These actinal spinelets are relatively larger than in either of the 2 
preceding forms and lie closer together, only 1 or at most 3 series of very fine granules separating 
them. As noted above, the adambulacral granules are smaller than those of the actinal intermediate 
plates, while in the 2 preceding species the reverse is the case. 
Madreporic body subcordiform or shield-shaped. Striations centrifugal, but very irregular and 
interrupted. The plate is perfectly flat, and is situated nearer the margin than the center. Anal 
aperture is surrounded by a number of much enlarged granules. 
Color in alcohol, dull dark brown; in life unknown; evidently darker than either of the preceding 
1 forms. 
Locality: Station 3982, vicinity of Kauai Island, 233-40 fathoms, coarse brown coral sand, shells; 
bottom temperature, 48.5°; 1 specimen, type no. 21178, U. S. National Museum. 
This is a more typical Ophidiaster than either of the 2 preceding species, on account of the 8 rows 
of papular pores. The submarginal series of either side is ventrolateral rather than actinal. But this 
form nevertheless has 3 rows of actinal intermediate plates, and the actinal surface is rather flat, not 
arched, as in lorioli. The name refers to the fluted character of the rays. 
Genus LEIASTER Peters. 
. Leiaster (subgen.) Peters, Monatsber. d. k. preuss. Akad. d. Wiss. Berlin, April, 1852, p. 177. 
Leiaster callipeplus, new species. 
Pi. xxx, figs. 1, la; pi. xxxi, fig. 3. 
Bays 5. E = 52mm.; r = 8mm.; R = 6.5to6r. Rays not all equal; shortest 47 mm. Breadth 
of ray at base, 8 mm. ; at widest part of ray, 9 mm. 
Rays subcylindrical, slightly constricted at base; of a nearly uniform caliber throughout; slightly 
broader than high, abruptly tapering to a blunt point. Rays fairly short for genus. Abactinal 
surface of disk slightly convex; interbrachial angle acutely rounded. No pedicellarise of any 
description. 
The whole test is covered by a thick, tough, smooth skin, which in the living state very effectively 
hides the plates, but in a dried state shrinks and allows the plates to be clearly seen. The papular 
areas, which are large, form 8 longitudinal series along the arms, but are irregularly scattered and 
much smaller on disk. Of these 8 series 1 is situated on either side of the ambulacral furrow, another 
on either side between the 2 marginal rows of plates, while the remaining 4 are on the convex abactinal 
surface. The actinal areas have 6 to 10 papular pores, the abactinal about 15, and all the pores are 
very small in alcoholic specimens. In many of the papular areas of dried specimens what appear to 
be 2 or 3 granules can be seen imbedded in the integument. The skeleton is composed of longitudinal, 
