Bd. VI: 4) THE ECHINOIDEA. I7 



by me. — The small globiferous pedicellariœ occur in two main forms: one short 

 (Ingolf Ech. I. PI. VIII Fig. 6), the other elongate, narrow (PL XIV Figs. 16 — 17), 

 somewhat recalling tridentate pedicellarise; probably it is this form which has been 

 figured by Doderlein in his »Japanischen Seeigeb Taf. IX Fig. 6 e and m, and 

 probably also the figure k represents such an elongate globiferous pedicellaria, since 

 tridentate pedicellariae have otherwise not been met with in canaliculata, either by 

 Clark or by myself. The two forms of the small globiferous pedicellariae are con- 

 nected by all transitions, and upon the whole they vary considerably. — In the 

 young ones only small globiferous pedicellariae are found; they are, from their first 

 appearance in the embryos, mainly of the same shape as in the grown specimens. 



The spicules of the tube-feet are of the usual form and, as usual, arranged so 

 as to leave a bare space for the tentacle-nerve. The lower tube-feet have a com- 

 paratively large sucking disc, with four rosette plates; in the abactinal tube-feet the 

 sucking disc is not developed, and the spicules are few and small; in the tube-feet 

 on the peristome the disc is small and irregular, and the spicules near the disc 

 generally developed into larger, irregular plates. — The walls of the intestine, the 

 genital organs and the organs of Stewart contain no spicules. The latter organs are 

 small and inconspicuous; the genital organs are also small, with only comparatively 

 few, but rather large eggs. (The size of the eggs cannot be given, since the exa- 

 mined specimens contained only unripe eggs.) 



The large primary tentacles of the embryos contain no spicules, only a small 

 ring in the point. 



The auricles (PI. XIV Fig. 2) are divergent, otherwise not peculiar. Ambulacral 

 prominences distinct. 



The colour is recorded by Agassiz (Rev. of Ech.) to be of a brilliant orange. 

 The specimens preserved in alcohol show only a reddish tint at the base of the 

 radioles, otherwise they are straw-coloured. 



The viviparous habit of the species (carrying its eggs and young on the apical 

 area, contrary to E. initrix which carries them on the peristome) is well known and 

 need not be further mentioned. None of the specimens in hand carry young ones. 



The species was taken by the Swedish South Polar Expedition at the following 

 localities: 



St. 43. Falkland Islands (51' 33' Lat. S. 58' 9' Long. W. Port Louis). Low water; 



stony bottom with algae. Several small specimens. 

 » 52. — — (51' 40' Lat. S. 57' 44' Long. W. 17 m. Port William). 



2 small specimens. 

 » 53. — — (51° 40' Lat. S. 57' 44' Long. \V. 12 m. Port William. 



Sand and gravel). 2 specimens. 



3 — 100133. Schwtdische Sudpolar-Expedition igoz —iqoj. 



