330 Mr. Jeffreys on Stilifer, 



British Isles. — Torbay, on Echinus esculentus, L. [E. sphcera, 

 Miill.) : Turton. Berwick^ on E. esculentus : Johnston. North- 

 umberland and Durham, on E. pictus: Alder, Howse, and Brady, 

 Cork : Humphreys. Plymouth, on E. saxatilis : Stewart, Bate, 

 and J. G. J. Shetland, on E. Drobachiensis, Miill. [E. neglectus, 

 Lam.) : J. G. J. 



(N.B. Although most Scandinavian naturalists consider the 

 Echinus neglectus of Lamarck to be the same species as the ^.Dro- 

 bachiensis of Miiller^s Prodromus to the * Zoologia Danica,^ it may 

 be doubted whether the latter species is not the E. Flemingii of 

 Ball. Miiller's description is " hemisphsericus, pallidus, spinis 

 longis, albis," which seems to agree better with E. Flemingii 

 than with E. neglectus.) 



The shell described by Professor Macgillivray, in his ' Mol- 

 luscous Animals of Aberdeen, Kincardine, and Banff,^ as Stylina 

 stylifera, and stated to have been found by one of his pupils 

 "adhering to an Actinia brought up by the lines," was the 

 young of a common West Indian land shell belonging to the 

 Cyclophorida. The habitat alone might have induced a suspicion 

 that this shell was not our Stilifer; and I had an opportunity 

 of ascertaining what it really was. 



Scandinavia. — From Bohuslan in Sweden to the coast of Nor- 

 way : Loven. Christiania-fiord, Norway, on Echinus esculentus 

 at Drobak, and on fishing-grounds at two other places : Asb- 

 jornsen. Bohuslan, in 20 fathoms, on E. neglectus: Malm. 



Fischer also states that Stilifer Turtoni is not uncommon on 

 Echinus lividus, near the mouth-opening ; but he cites no au- 

 thority for this unusual habitat. E. lividus, as is well known, 

 excavates holes in slate and gneissic rocks, within tide-marks, 

 and its lower surface is pressed closely to the stone. 



Another instance of the same kind of mollusk infesting dif- 

 ferent Echinoids is that of Montacuta substriata, which has been 

 found not only on Spatangus purpureus, but on S. meridionalis, 

 Amphidetus ovatus, Brissus lyrifer, Echinus esculentus, and Ci- 

 daris hystrix. 



2. S. astericola, Broderip. 



Hab. Lord Hood's Island, on Asterias Solaris [A. helianthus, 

 Lam.) : Cuming. 



3. S. Mittrei, Petit. 



Hab. Indian Ocean : Mittr^. 



4. S. fulvescens, A. Adams. 

 Hab. Isle of Labuan, in an Asterias : A. Adams. 



