97(5 ^"" ^ÎORTENSEN. 



Strongylocentroiiis drøbachiensis D uncan & Sladen. 1881. Mern. Ech. 



Arctic Sea. p. 19. PI. И. Figs. 1—3. 

 — Ludwig. 1886. Echinodermen d. 



Beringsmeeres. p. 281. 

 — Rankin. 1901. Echinoderms. West 



Greenland, p. 170. 



— chlorocentrotus De Loriol. 1901. Notes pour servir 



à l'étude des Echinodermes. IX. p. 40. 

 PI. III. Fig. 5. 



— drøbachiensis Grieg. 1902. Nordl. Norges Echino- 



dermer. p. 32. 



— — Th. Mortensen. 1903. 'Ingolf" Echi- 



noidea. I. p. 162. PI. I. Figs. 5-6. 

 PI. II. Figs. 3-5. PI. XVI. Figs. 4, 9, 

 11, 13, 17, 21, 23. PI. XX. Figs. 3-6, 

 12 13, 16, 18, 20, 25, 26, 29. 



— — Michailovskij. 1903. Echinoder- 



men Russ. Exped. Spitzbergen, p. 13. 

 _ _ Clark. 1904. Echinoderms of the 



Woods Hole Region, p. 563. PI. 9. 

 _ — Döderlein. 1905. Arktische Seeigel. 



Fauna Arctica. p. 380. 



— — Grieg. 1907. Echinodermata. II. 



"Fram" Exped. p. 23. 



Several specimens from Stations: 20, 57, 58, 60, 63, 68, 69, 70, 

 71, 72, 96.1 



In the "Ingolf" Echinoidea I. p. 120 I suggested that the Stron- 

 gylocentrotiis chlorocentrotus Brandt would prove to be distinct from 

 drøbacliiensis, founding my opinion mainly on a specimen in the 

 collection of the Copenhagen Museum which might perhaps be the 

 true chlorocentrotus. It is, however, said in conclusion that "nothing 

 definite can be said of Str. chlorocentrotus, until the type specimen 

 has been reexamined". 



Recently Lambert & Thiéry (Notes Echinologiques. II. Sur les 

 genres d'Échinides proposés par Brandt en 1835. Bull. Soc. Sei. nat. 

 Haute-Marne. 1909. p. 38) maintain that "on ignore d'ailleurs ce que 

 pouvait être exactement cet E. chlorocentrotus, insuffisamment décrit 

 et d'origine inconnue. C'est sur une simple supposition de Postel 

 qu'Ai. Agassiz l'indique à Sitka, car Brandt nous dit "patria ignota, 

 locum enim natalem Mertensius non annotavif'.'" 



Wishing very much to have this matter settled through a 

 renewed examination of the type specimen I Avrote to the Director 



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



