Bd II: 4) 
THE ECHINOIDEA. 
91 
pedicellariæ (PI. XIX Figs. 16, 21) are of the Brisaster- type, very coarse, the blade 
short, somewhat widening towards the point and ending in about 10 — 14 rather 
coarse teeth. * The basal part is broad, the sides may be somewhat reenteringly 
curved. The neck is very short or not at all developed. The tridentate pedicella- 
riæ (PI. XIX Figs. 7, 49) are elongate, narrowed in the lower part, about half the 
length of the blade or a little more in the larger, comparatively less in the smaller 
ones; the outer part is spoonshaped widened, the two parts being rather sharply 
limited. These pedicellariæ reach a size of up to 1 mm. length of head. The 
neck is well developed. Quite small ones have the blade simply leafshaped, differing 
from the triphyllous pedicellariæ only in being more elongate, while in the latter 
the blade is almost round. Another slightly different form of tridentate pedicellariæ 
(PL XIX Fig. 15) has the outer widened part of the blade somewhat more coarsely 
serrate in the edge; it is, however, not very sharply distinguishable from the other 
form. — The sphæridiæ are smooth, but rather much grooved in the point. 
The colour seems to be violet; at least there are traces of this colour on the 
specimens before me. 
The Swedish South Polar Expedition has taken two specimens of this species 
at Station 2 (37°50' S. 56° 1 1 ' W. 100 m. Coast of North Argentina); the P’uegian 
Expedition has taken some (broken) specimens at Puerto Condor (54° S. 70°8' W.). 
Its geographical distribution, as hitherto known, is along the South American Coast, 
from the La Plata on the Atlantic to Calbuco on the Pacific side; it is not known 
from greater depths than about 100 m. — According to MEISSNER (Hamb. Magalh. 
Sammelreise) it also occurs at Fernando Po (Gulf of Guinea). That this statement 
rests on a wrong identification is certain. I have examined the specimen on which 
the statement is founded, and find it to be probably S. Edwardsi Cotteau. It is 
a young specimen and not very perfectly preserved, the identification is therefore 
not beyond doubt; but it is certain that it belongs to the high forms, Schisaster 
s. str., and has nothing to do with Sch. Philippii. 
Regarding the affinities of Sell. ( Tripylaster ) Philippii I may refer to what has 
been said above (p. 68) and to the »Ingolf» Echinoidea II. p. 1 2 1 — 122. 
Amphipneustes Lorioli KOEHLER. 
PL XI, Figs. 17, 19. PI. XIX, Figs, i — 2, 6, 10—12, 17, 22, 26. 
Amphipneustes Lorioli Koehler. 1901. Résultats du Voyage du S. Y. »Belgien» en 1897 — 1899. Zoo- 
logie. Échinides et Ophiures, p. 12. Pis. II. Fig. 12, V. Fig. 37, VI. Figs. 42 — 43. 
One specimen of this very interesting Echinoid was taken by the Swedish South 
Polar Expedition at Station 11 S. 56 48' W. 400 m.; Graham Region). It 
* Döderlein (loc. cit.) describes these pedicellariæ as having the outer edge »schwach gezähnelt», 
which does not appear to me very appropriate, at least not for the larger samples. 
