402 



Proceedings of the Royal Physical Society. 



Fam. IX. POURTALESIID^. 



# 



27. Pourtalesia miranda. 



28. ,, Jeffrey sii. 



29. ,, fhyaU. 



The following species should, I think, be excluded from 

 the list • — 



1. Arachnoides placenta. 



This rests only upon a single specimen, said to have been 

 obtained by Jameson, in very deep water, off the Island 

 of Foula, Shetland ; for the rest the species (and indeed 

 the whole genus) is confined to the tropical and south 

 temperate regions of the old world. In default of further 

 evidence, it is not unreasonable to assume that some mistake 

 must have occurred with reference to Jameson's example. 



2. Pourtalesia miranda. 



Considerable uncertainty hangs about the locality *' Shet- 

 land Channel" given by Agassiz for this species. The 

 station to which he refers^ ("off Kockall, 1215 fathoms") is 

 the one at which Gwyn Jeffreys dredged the two specimens 

 which presented characters " too undefined for satisfactory 

 definition," but which became the types of Pourtalesia 

 jphyale? 



Of the species just enumerated, the following thirteen are 

 also found in Norweo;ian waters : — 



Cidaris papillata. 

 Strungyloccntrotus drohachiensis. 

 Ecldnus esculentus. 



, , acutus. 



, , elegans. 



, , noTvcgicus. 



,, miliar is. 



Echinocyamus pusillus. 

 Schizaster fragiiis. 

 Brissopsis lyrifcra. 

 Spatangus purpureus. 

 Echinocardiu'ni cordatum. 

 , , Jiavescens. 



The following eleven are also common to the Mediter- 



ranean : — 



Cidaris 2}apillata. 

 Strongyloccntrotus lividus. 

 Spha^r ecldnus granu laris. 

 Echinus acutus. 

 , , vielo. 

 miliaris. 



Echinocyamus pusillus. 

 Brissopsis lyrifcra. 

 Spatangus pitrpureus. 

 Ech inocard iuvi cordatum. 

 , , Jiavescens. 



^ Rev. Echin., p. 561. 



- ''Porcupine" Ecliiu., p. 719. 



