^MARSHALL : ADDITIONS TO "BRITISH CONCHOLOGY." "Jl 



herrings sent to me from the west coast for examination tilled with 

 h"ttle else than these pteropods, numbers of which appear to have 

 been swallowed wholesale, as some of the shells were practically 

 uninjured."^ 



It had long been a moot point whether L. retroversa possessed an 

 operculum. Gwyn Jeffreys and others had failed to detect one, 

 although the former was "kindly assisted in the examination by 

 Dr. Carpenter, when many specimens were sacrificed on the altar of 

 science ;" but Dr. Pelseneer declares that it really is provided with 

 an operculum, and his authority must be considered conclusive. 

 (Sars has gone further and figured it). It is now believed that all 

 the Limacina possess opercula, but that they are shed when the 

 animal becomes aged. Dr. Pelseneer also says that "the surface 

 exhibits longitudinal stride distinctly recognisable," although it has 

 been generally described as without sculpture. Few shells are 

 really smooth except to the unaided eye, but from a minute 

 examination of fresh specimens with a Coddington lens, and in a 

 strong light, I could detect longitudinal flexuous strife, which are 

 more clearly discernible under a microscope. 



Some dead shells of L. helicoides Jeff, were dredged in the ' Por- 

 cupine' Expedition of 1869 in the Atlantic off Ireland, 1215 fathoms. 

 Dead shells of another pteropod (doubtfully referred to Peracle diversa 

 Monts.) were also dredged off the south of Ireland in 1889 in the 

 ' Flying Fox ' cruise. 



Cavolinia trispinosa Lesueur has been dredged by the ' Por- 

 cupine' off Valentia, by the 'Flying Fox' off the south of Ireland, and 

 by the Royal Irish Academy cruise in S.W. Ireland, besides Jeffreys' 

 record of a specimen having been " washed ashore at Youghal with 

 Spirula auslralis." Pelseneer also quotes "Triton Expedition" for 

 this species, though it is not recorded in Jefl'reys' Report of that 

 cruise. 



Clio pyramidata E. — Dredged plentifully off the south coast of 

 Ireland in the 'Porcupine' Expedition of 1869, and in the 'Flying 

 Fox' cruise of 1889. 



Cephalopoda Cuvier. — A summary embracing the most recent 

 researches into this Family was published by Canon Norman in the 

 "Annals" for 1890. 



A pearly nautilus, otherwise " Portuguese man-of-war," containing 

 the animal, was washed ashore at Jersey some years ago, and is now 

 in the Jersey Museum. 



t Ann. Rep. Fish. Bd. Scotland, 1898, p. 156. 



