the Echinodermata of the Arctic Expedition. 469 



generalizations invalid. To mention one instance alone. 

 Writing on the results of the ' Porcupine ' dredgings in 1869, 

 which have not yet been published in full, Sir Wyville Thom- 

 son, in his ' Depths of the Sea,' remarks : — Between Scotland 



and Fffiroe " we find every one of the Echino- 



derms hitherto found on the coast of Scandinavia and Green- 

 land, with the single exception, I believe, of Ophioglypha 

 Stuwitziiy a shallow-water Greenland form, among the 

 ophiurids, and of one or two holothurids, which have yet 

 evaded us " {I. c. p. 43). It is tantalizing that Sir Wyville 

 Thomson gives no record of the special Asteroids in his 

 agreeably written narrative. 



Table showing the general Geographical Distribution of the variotis 

 Species above mentioned; together ivith an Indication of those ob- 

 tained by the previous Arctic Explorers, Captains Parry and 

 Penny. 



O 



o 



w 



Cucumaria frondosa 



Strongylocenti-otus drobacbiensis 

 Asteracanthiou gi'onlandicus . . . . 



polaris 



palfeociystallus 



Stichaster albulus 



Crossaster papposus 



Solaster endeca 



furcifer 



Pteraster militaris 



Ophiogl}'pha Sarsii 



robusta 



Stuwitzii 



Ophiocten sericeum 



Ophiopliulis bellis 



Amphiura Holbolli 



Ophiacantha spimilosa 



Astrophyton arcticuinf 



Anteduii Kschrichtii 



celtica 



The following were not obtained by this expedition : 



Ctenodiscus crispatus. 



Cucuiuaria IIyndm<ani = C. Korenii, Ltk. 



Chirodota brevis, //*a7<?y,=Myriotrochu3 Rinkii, Stp. 



Ophiura glacialis, Forbes. 



t This was dredged by Sir John Ross in 1818. 



