Mr TV. E. Tloyle on Loligopsis and some other Genera. 313 



Astartc mdcaia (Da Costa) var. Scotica. 



Newhaven not common. 

 Tellina pusilla, Philippi. 



A single valve west of May Island, 20 



fathoms. 

 Lyonsia Norvegica (Chemn.). 



A single broken valve at Newhaven. 

 Odostomia rufa (Philippi) var. fulw-cincta (Thomps.). 



One living and several dead specimens, 



west of May Island, 20 fathoms. 

 Natica Montacuti, Forbes. 



Living specimens rather rare at Newhaven ; 



west of May Island, dead. 

 There was also exhibited a glass float, which had been 

 sunk accidentally to the bottom of Granton Quarry — in salt 

 water — for a few months. It was partly covered with As- 

 cidians, including several large specimens of Ascidia scahra, 

 Mlill. 



XXIV. On Loligopsis and some other Genera. By William E. 

 HOYLE, Esq., M.A. (Oxon.), M.K.C.S., E.RS.E., Naturalist 

 to the " Challenger " Commission. 



(Read 17th December 1884.) 

 [Published by pennission of the Lords Commissioners of the Treasury.] 



An attempt to deal with the numerous and somewhat 

 heterogeneous forms which have at various times and by 

 different observers been referred to the genus Loligopsis 

 hardly requires any apology. If any were needed, it would be 

 sufficient to say that 18 species have been at different times 

 so placed, and that by different observers these forms have 

 been referred to no less than eight distinct genera,^ and that 



1 Since this paper was read, Dr PfefFer {Ahhandl. Naturioiss. Verein Ham- 

 burg, Bd. viii., Heft 2, 1884) has added another species to this list, and one 

 more to the number of genera in which the previously described species have 

 been placed. Of Dr Pfeffer's Loligopsis Schneehageni, I can only at present 

 remark that it seems to me to have no claim to stand in that genus as 

 defined by Lamarck ; if the genus be taken as defined by d'Orbigny, then its 

 proper position would most likely be the genus Taonius, but there are some 



