no TH. MORTENSEN, (Schwed. Südpolar-Exp. 
Fig. io. Schizaster ( Tripy laster) Philip pH. Actinal side. Same specimen as Figs. 8 and 
ii. 1 1 1. 
» ii. Schizaster ( Tripylaster) Philippii. Abactinal side. Same specimen as Figs. 
8 — io. I /i. 
Plate XIII. 
All the figures refer to Ctenocidaris speciosa Mrtsn. 
Fig. i. Interambulacrum of a specimen infested with Echinophyces ; the small pore in the 
middle is the transferred genital opening. 4 /i. 
» 2. Apical system of a female specimen. 2,4 /i. 
» 3. Interambulacrum, seen from the inside, from a specimen infested with Echi?iophyces ; 
most of the genital gland has been prepared away in order to show the course 
of the extraordinary genital duct. 
4 / 1- 
4 - 
Valve of globiferous pedicellaria, from 
the inside. (Comp. Fig. 
14.) 7 %- 
5 - 
Transverse section of radiole. 5 %. 
6. 
Actinal radiole of a young specimen, 
3 mm. in diameter. 35 /i. 
7 - 
» » » » grown » ; 
side view. 3 -s /i. 
8. 
» » » » » » ; 
front view. 3 ' 5 /i. 
9 - 
Valve of globiferous pedicellaria from a specimen infested with Echinophyces ; 
from the inside. I25 /i. 
10. 
Actinal radiole; front view. 3-5 j t 
1 1. 
Abactinal radiole. 3-5 /i. 
12. 
Actinal » 3 ' 5 /i. 
I 3 - 
Part of an ambulacrum. IO /i. 
14. 
Valve of globiferous pedicellaria; side 
view. (Comp. Fig. 4.) 
7 %. 
I 5 - 
Actinal radiole. 3 " 5 /i. 
Plate XIV. 
Fig. i. Part of an ambulacrum of Austrocidaris canaliculata. 16 /i. 
» 2. Auricule of Austrocidaris canaliculata; seen from the oral side. 8 /i. 
» 3. Part of an ambulacrum of Austrocidaris spinulosa. I4 /i. 
» 4. Actinal radiole » » » (Comp. F’igs. 12 — 13.) 6-8 /i. 
» 5. Valve of small globiferous pedicellaria of Austrocidaris spinulosa. Side view. 7 %. 
» 6. Apical system of Austrocidaris canaliculata , male specimen; »Altata». s /i. 
», 7 — 8. Actinal radioles of » » (comp. Fig. 11). 8 /i. 
» 9. Valve of small globiferous pedicellaria of Austrocidaris canaliculata ; »Altata». 7 %. 
» 10. Apical system and adjoining upper coronal plates of Austrocidaris canaliculata; 
»Altata», large specimen. 2-8 /i. 
» ii. Actinal radiole of Austrocidaris canaliculata. (Comp. Figs. 7 — 8.) 8 /i. 
» 12 — 13. Actinal radioles of Austrocidaris spinulosa. (Comp. Fig. 4.) 6,8 /i. 
» 14. Valve of small globiferous pedicellaria of A ustrocidaris spinulosa, side view. 7 %. 
» 15. » » large » » » » » , from the inside. 7 %. 
» 16. » » small » » » » canaliculata , side view. 7 °/x. 
