274 Th. Mortensen. 



Amphiura Sundeualli Michailovskij. 1903. Echinod. Russ. Exped. 

 Spitzbergen, p. 34, 73. 



Station 63. Stormbugt. 10 — 20m. 1 specimen. 



20. Ophiacantha bidentata (Retz.). 



Ophiacantha spinulosa Lütken. 1857. Grønlands Echinod. p. 53. 



— _ — 1858. Additam. ad hist. Oph. I. p. 65. 



Tab. II. Fig. 14 a -b. 

 — Lyman. 1865. Ophiuridæ & Astrophytidæ. 

 p. 23. 



— — Duncan & Sladen. 1881. Mem. Ech. Arctic 



Sea. p. 68. PI. IV. Figs. 11— 13. 



— bidentata Grieg. 1893. Norske Nordh. Exp. Ophiu- 



roidea. p. 22. 



— — Gr>ieg. 1900. Ophiuriden d. Arktis. Fauna 



Arctica. p. 267. 



— — Grieg. 1902. Nordlige Norges Echinod. p. 13. 



— — Th. Mortensen. 1903. Echinoderms from East 



Greenland, p. 86. 



— — Michailovskij. 1903. Echinodermen Russ. 



Exp. Spitzbergen, p. 36. 



— — Grieg. 1907. Echinodermata. II. "Fram" 



Exped. p. 21. 



— — Кое h 1er. 1909. Échinodermes. Monaco. 



XXXIV. p. 184. PI. VI. Fig. 3. 



Several specimens from Stations 9, 15, 57, 63, 64, 68, 71, 72, 95, 

 96, 99, 104.1 One specimen (Stat. 63) is 4-rayed. 



Several of the specimens (e. g. from Stations 15, 63, 96, 104) have 

 ripe sexual products. The eggs are rich in j^olk and large, ca. 08 mm 

 in diameter. This large size may be taken as a nearly decisive 

 proof that this species has not pelagic larvæ. The eggs in the same 

 ovary are very different in size, from ripe to quite young, which 

 fact is likewise in accordance with the suggested non-pelagic habit 

 of the larvæ. 



21. Oijhioscolex glacialis M. Tr. 



Ophioscolex glacialis M. Sars. 1861. Overs. Norges Echinod. p. 7. 

 Tab. I. Fig. 6— 7. 



— — Grieg. 1893. Norske Nordh. Exp. Ophiuroidea. 



p. 27. 



— — Grieg. 1900. Ophiuriden d. Arktis. Fauna 



Arctica. p. 268. 



' For the localities of the stations see the list p. 300. 



