Mr. Jeffreys on British Mollusca. 121 



for his assistance in determining many of the species now pro- 

 posed to be added to the British fauna. 



Acephala Lamellibranchiata. 



Teredo Norvegica, Forbes fy Hani. Brit. Mall. vol. i. p. 66. 

 Guernsey, in piles (Dr. Lu/cis). 



Pholas parva, i. 111. Guernsey, with P. dactylus, in submarine 

 wood and peat (Dr. Lukis). 



P. Candida, i. 117. Guernsey, with the last two (Dr. Lu/cis). 



Saxicava arctica, i. 141. Guernsey, with 8. rugosa; but I am 

 not satisfied as to the distinctness of the two species. 



S.? fragilis (Nyst), Wood's Crag Moll. p. 288. tab. xxix. figs. a-e. 

 S. rugosa, juv. ?, B. M. i. 149. pi. 6. f. 1-3, and iv. 248. In trawl- 

 refuse from Plymouth ; and I have it also from the Hebrides and 

 Aberdeen. Mr. Searles Wood, who is now satisfied as to the identity 

 of his fossils with the recent species, has mentioned that several dead 

 valves were obtained from the beach on Stone Point, at Walton-on-the» 

 Naze ; and Mr. M 'Andrew dredged it in Vigo Bay, — so that it has 

 an extensive range. There can be no question of its being quite 

 distinct from S. rugosa, if indeed it belong to the same genus. 



Panopsea Aldrovandi, i. 1/8. A pair of this magnificent shell 

 w r as brought to me many years ago, as having been taken in a trawl- 

 net oif the Cornish coast ; and I have no reason to doubt the possi- 

 bility of its being a British shell, any more than the Triton cutaceus 

 and nodiferus, which (as will be presently seen) are now satisfactorily 

 proved to be inhabitants of our southern coast. 



Nesera costellata, i. 199. Shetlands (Mr. Barlee). 



Thracia villosiuscula, i. 224. Guernsey. 



T. convexa, i. 29. Part of a valve in dredged sand from Skye. 



Solecurtus candidus, i. 263. Herm and Guernsey, in sand, at half- 

 tide mark (Dr. Lukis). 



Psammobia vespertina, i. 2/1. Guernsey (Dr. Lukis & J. G. J.). 



P. Ferroensis, i. 274. Guernsey (Dr. Lukis & J. G. J.). 



Diodonta fragilis, i. 284. Guernsey. Only part of a valve, but 

 sufficiently characteristic for distinction. 



Tapes decussata, i. 379. Guernsey (Dr. Lukis). 



T. aurea, i. 392. Guernsey (Dr. Lukis). 



Cytherea chione, i. 396. Guernsey; rare (Dr. Lukis). 



Cyprina Islandica, i. 441. Guernsey (Dr. Lukis). 



Circe minima, i. 446. Plymouth. 



Astarte arctica, i. 464. The single valve, which was dredged by 

 Mr. M'Andrew in the outer haaf-grounds, Zetland, and recorded in 

 the ' British Mollusca,' is evidently fossil ; and Mr. M'Andrew agrees 

 with me as to this. The late Professor Macgillivray's specimen was 

 taken with valves of Pecten Lslandicus, and has also the same Ter- 

 tiary origin. My specimen, which was presented to me by the late 

 Dr. Fleming, from St. Andrew's Bay, is in the same condition ; and 

 there is no satisfactory evidence of this species having been found on 

 our coasts in a fresh or recent state. 



