450 Prof. P. M. Duncan and W. P. Sladen on 



variable, that we propose to describe it fully in a separate 

 monograph. — P. Martin Duncan.] 



Localities. To avoid repetition, the following are the posi- 

 tions of the collecting-stations in Grinnell Land mentioned in 

 this rej)ort : — 



Floeberg Beach (the Avinter quarters of H.M.S. ' Alert '), 

 lat. 82° 27' N., long. 61° 42' W. 



Discovery Bay (the winter quarters of H.M.S. ' Discovery'), 

 lat. 81° 41' N., long. 64° 45' W. 



Richardson Bay, lat. 80° 5' N. 



Cape Fraser, lat. 79° 44' N. 



Hayes Point, lat. 79° 42' N. 



Dobbin Bay, lat. 79° 40' N. 



Cape Louis Napoleon, lat. 79° 38' N. 



Franklin-Pierce Bay, lat. 79° 25' N. 



Synonymy. It has not been the intention in the following 

 citations to supply a complete list of all the different authori- 

 ties by whom the various determinations have been maintained, 

 but simply to give such references as will be found sufficient 

 to indicate the history or title-warrant of the nomenclature 

 employed. It is hoped that the method of " authorization " 

 which is here adopted will serve not only as an " index of 

 registration," but likewise accord acknowledgment to the 

 original describer — the name of the latter being enclosed 

 within parenthesis, and followed by that of the naturalist 

 who first used the combination as here given. 



Although the present report is chiefly confined to a descrip- 

 tion of the Echinoderms obtained north of lat. 78° N., it has 

 been thought desirable and interesting to include the record of 

 a dredging made by Captain Feilden during the outward 

 voyage, on July 2, 1875, in lat. 65° N. The station was 26 

 miles from the Greenland coast, and the depth 30 fathoms ; 

 bottom rocky, with rounded pebbles. The following Asteroids 

 and Ophiurans were taken here : — Aster acanthion polarisj 

 M. & T. ; Solaster encleca (Linn.), Forbes; Ojyhioylypha 

 robusta (Ayr.), Lym. ; OiMoglypha Stuwitzii (Liitk.), Lym. ; 

 OjpMo'pliolis hellis (Linck),Lym. 



hist of the Echinoderms collected during the Arctic 

 Expedition 0/1875-76. 



HOLOTHTJRIOIDEA. 



Cucumaria frondosa yGunn.), Forbes. 



EcniNOIDEA. 



Strongylocentrotus drobachiensis {0. F. M.), A. Ag. 



