Bd II: 4) THE ECHINOIDEA. 91 



pedicellariae (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- 

 riae (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 pedicellariae 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 pedicellariae only in being more elongate, while in the latter 

 the blade is almost round. Another slightly different form of tridentate pedicellariae 

 (PI. 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 sphaeridiae 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. 561 1 ' W. 100 m. Coast of North Argentina); the Fuegian 

 Expedition has taken some (broken) specimens at Puerto Condor (54' S. yo°S' W.). 

 Its geographical distribution, as hitherto known, is along the South American Coast, 

 from the Ea 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 5. Edzvardsi 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, Schizaster 

 s. str., and has nothing to do with Sch. Philippii. 



Regarding the affinities of ScJi. (Tripylaster) PJiilippii I may reter to what has 

 been said above (p. 68) and to the »Ingolf» Echinoidea II. p. 121 — 122. 



Amphipneustes Lorioli KOEHLER. 

 PI. XI. Figs. 17, 19. PI. XIX. Figs. 1—2. 6. 10— 12, 17, 22. 26. 



Amphipneustes Lorioli KOEHLER. 1901. Resultats du Voyage du S. V. *Belgica» en 1897 — 1899. Zoo- 

 logie. Echinides 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 (65^19' S. 56 48' W. 400 m.; Graham Region). It 



* Doderlein (loc. cit.) describes these pedicellariae as having the outer edge »schwach gezahnelt», 

 which does not appear to me very appropriate, at least not for the larger samples. 



