112 BULLETIN 100, UNITED STATES NATIONAL MUSEUM 
The specimen from station 5116 is smaller, 70 mm. long, 63 mm. broad, 
and 45 mm. high; it is very badly broken and incomplete, but it was 
found possible to glue the fragments together so as to form a tolerably 
good specimen. Of the two specimens from station 5527 one is a very 
fine one, 75 mm. long, 70 mm. broad, and 61 mm. high; the other is 
slightly larger but badly broken and incomplete. 
The two specimens from station 5527 are lighter in color than the 
others; they are brownish whereas the others are dark purplish. One 
might be tempted to regard them as forming another species than 
relictus, or a variety of the latter; but I do not think it justifiable on 
the basis of the material now available to separate them from the 
typical relictus. Itis important that they do not differ from the typical 
relictus in the shape and characters of the test. In regard to the pedi- 
cellariae it is noteworthy that the ophicephalous type varies consider- 
ably, the valves being either broad as in the type or slenderer, with the 
blade distinctly narrower than the basal part; but the same is found 
in the specimen from station 5116, which is dark purplish hke the 
type. Wemust therefore acknowledge as a fact that the ophicephalous 
pedicellariae of S. redictus may vary considerably in the shape of the 
valves, the various forms occurring in one and the same specimen; but 
in some specimens only the broad-valved form occurs, as appears to 
have been the case in the type specimens. 
Globiferous pedicellariae (described by de Meijere as a particular 
kind of ophicephalous pedicellariae) I have found in the specimen 
from station 5425 but, unfortunately, not in the other specimen; if they 
had been found and proved to differ in shape from those of the type 
and of the specimen from station 5425, that would have been an im- 
portant argument for regarding these hght-colored specimens as dif- 
ferent from the typical relictus. 
Family PALAEOSTOMATIDAE 
Genus PALAEOSTOMA A, Agassiz 
PALAEOSTOMA MIRABILE (Gray) 
Leskia mirabilis Gray, Ann. Mag. Nat. Hist., ser. 2, vol. 7, p. 184, 1851. 
Palaeostoma mirabilis A. AGAssiz, Revision of the Echini, p. 583, pl. 32, figs. 
13-15, 18738.—H. L. Clark, Catalogue of the Recent sea-urchins in the British 
Museum, p. 193, 1925. 
Palaeostoma mirabile LovEN, On Pourtalesia, p. 27, pl. 16, figs. 184-196, 1883.— 
DE MEWERE, Siboga HWehinoidea, p. 172, 1904.—KoruHter, Echinoderma of the 
Indian Museum, HWehinoidea, pt. 1, Spatangidés, p. 36, pl. 3, figs. 1, 2, 6, 8, 9; pl. 
17, figs. 19-29, 1914. 
Locality—Station 5206, Badian Island (lat. 11°32’ N., long. 
124°41’ KE.) ; 59 meters; April 14, 1908. One dead test, 12 mm. long. 
