Messrs. Barrett and M'Andrew on Echinodermata, 43 



VI. — List of the Echinodermata dredged between Di^ontheim and 

 the North Cape. By R. M'Andrew, Esq., F.R.S., and 

 L. Barrett, F.G.S. 



Echinodermata, 



Holothuriadce. — In Dubcn and Keren's list of the Norwegian 

 Echinodermata, thirteen species of this order are described. In 

 our own researches we only procured six species, of which one 

 is new ; it belongs to the genus Eupyrgus ; this same genus is 

 represented on the coast of Greenland by another small species 

 {E. scaber). The Holothuriadce are not common Radiata on the 

 Norwegian coast, only one species [Cucumaria frondosa) being 

 dredged abundantly. 



Echinida. — The species of this order procured by dredging 

 are few, but this deficiency is quite made up by the abundance 

 of individuals. The Echinus miliaris is common among the 

 Laminaria. Echinus esculentus is seen in great abundance at 

 lov/-water in the south ; in the north its place is taken by Echi- 

 nus neglectus. The three species above mentioned being found 

 in great plenty, form a very characteristic feature of the Lami- 

 narian zone. Echinus neglectus is a very variable species : spe- 

 cimens differ principally in the length of the spines, some being 

 covered with short ones of equal length, others with long purple 

 spines, or long primary and short secondary ones ; possibly these 

 may be two species. Echinocyamus angulosus, of Leske, was 

 very common in the south among NuUipora and sand. Schiz- 

 aster fragilis was met with several times on a muddy bottom, 

 generally in deep water. In Drontheim Fiord we dredged some 

 specimens in thirty fathoms, but in the north it lives in much 

 deeper water, being brought up from 100 to 150 fathoms. 

 Spatangus pwyureus occurred but sparingly, in shallow water, 

 as far north as Hammerfest, but it was very small : on one 

 occasion Montacuta was found attached to its spines. The two 

 species of Amphidetus were taken : Amphidetus cordatus is com- 

 mon in the south, and A. roseus in the north. 



Asteriada. — Eighteen species of Asteriada are included in 

 Duben and Koren's list of the Scandinavian Echinodermata; 

 only ten of these were dredged by us on the northern coast. 

 Some of the species included in the above-mentioned list were 

 procured from the southern part of the western coast ; but as 

 our researches were confined to the shore between Drontheim 

 and the North Cape, it could not be expected that we should 

 collect as many species. One species of Astropecten was often 



