REPORT OF THE ECHINOIDEA—MORTENSEN 99 
Remarks.—The specimens are 51-65 mm. long; they are quite typical 
annandalet. 
As this species was hitherto known only from the Indian Ocean, 
mainly the western part, it is of considerable zoogeographical interest 
that it is here shown to occur also in the Philippines, which implies 
that it must be more widely distributed in the Malay region. 
CLYPEASTER (CORONANTHUS) PATERIFORMIS, new species 
Station 5276, Malavatuan Island, Luzon (lat. 13°49’ N., long. 120°15’ 
E.) ; 33 meters; July 17, 1908. One specimen. 
Type.—U.S.N.M. No. E.7148, from station 5276. 
Description.—Test almost circular, 70 mm. long, 69 mm. wide; only 
between the paired petals the edge is nearly straight. It is very low, 
height only about 9mm. The oral side is markedly concave, the shape 
of the test recalling, indeed, a sacrificial dish (patera) as expressed in 
the species name. 
The petals are very short, the whole petaloid area only 28 mm., or 
much less than half the test length. The frontal petal is slightly the 
longest. The petals are leaf-shaped, broad adapically, pointed and 
closed distally. The ridges between the pore-pairs carry 4-7 primary 
spines (tubercles). 
The primary spines of the oral side are about 3 mm. long, not or only 
slightly widened distally; the marginal spines form a distinct fringe. 
The spines around the peristome are not curved or widened. The ab- 
oral primaries are 1 mm. long, not club-shaped. Miliary spines not 
peculiar. The apical system is central; the genital pores are covered 
by fairly large genital papillae. The periproct is small, 2 mm. in 
diameter, covered with small spines as usual in Clypeaster, it is 7 mm. 
distant from the edge of the test. The peristome is small, transverse- 
oval; it is hardly at all sunken. 
The tridentate pedicellariae have very slender valves, which meet 
only distally where they are widened and deeply serrate. The ophi- 
cephalous pedicellariae have a rather long narrow basal part, without a 
circle of thorns. Triphyllous pedicellariae not peculiar. The sucking 
disk of the tube feet is well developed. 
The color is a uniform brownish. 
Remarks.—This species appears to be the nearest related to Clype- 
aster telurus, with which it agrees in the important character of the 
great distance between the periproct and the edge of the test. It dif- 
fers, however, from tel/urus by its round outline, the not club-shaped 
aboral primary spines, the smaller petaloid area, and the different 
shape of the tridentate and ophicephalous pedicellariae. There can 
be no doubt of its specific distinctness. 
