POSTSCRIPT. 257 



but the short stalk, and carinated back valve, will at all 

 times sufficiently distinguish the L. anserifera. This latter 

 circumstance, of the black valve being carinated, induced 

 Bruguiere and Mr. Wood to consider the toothed variety 

 as a distinct species. 



Lepas sulcata. p. 72. 



Variety. The front margin of the upper pair of valves 

 fringed with four or five projecting sharp spines, giving it 

 jnuch the resemblance of the cartilage side of Venus Dione : 

 and the edges of the back valve serrate or slightly toothed 

 towards the base. 



Lepas punctata. p. /8. 



Variety. On a long stalk, like the L. elongata. 

 This variety we found abundantly on the projecting rock 

 which separates the Dawlish and the Warren sands. 



Miii-ex antiquus, Variety, reversed, p. 89. 



Lister's figures have every appearance of fossile shells ; 

 .and it is probable that Lister himself considered them as 

 such ; as at pi. 907- f. 27- he remarks, that the Murex per- 

 versus was the only left-handed marine shell which had 

 ever come under his inspection : **sola cochlea e marinis 

 est, quantum hactenus vidi, qure e dextra sinistrorsum tor- 

 quetur :" and at lot 2004 of the Portland Catalogue, a re- 

 versed Murex is mentioned as a petrifaction from Harwich, 

 Linn<$ and Grnelin, however, admit a recent reversed spe- 

 cies, much allied to Murex antiquus, under the name of 

 M. contrarius, referring to Lister's plate 950, for a reprer 

 sentation of it. In the Portland Catalogue it is exhibited 

 as a variety only, as the lot 4020 is described, " Murex 

 antiquus, L. and a reversed one, extremely scarce, nameci 

 by L. Murex contrarius : " but its country is not mentioned. 

 This lot was sold to Mr. Dillon for two guineas, 



Nerita sulcata. p. 124. 



Litter, pi. 607. f. 41? 



Lister marks this as English, describing it, <s lineis un r 

 datis rarioribus per obliquum depictus." His figure exhi- 

 bits a grooved appearance, but his words may imply ncn 

 2 3 thing 



