APPENDIX. 259 



Vol. ii. p. 445. Propilidium ancyloide. 



In the interior of this shell there may be discerned, by the aid 

 of a lens, a minute plate (as in Puncturella) at the extreme apex, 

 which separates the spiral portion from the conical. 



Vol. ii. p. 472. Fissurella. 



The Fissurella Zetlantica and F. marginata of Brown (111. 

 Conch. G. B. pi. 12, f. 8, 9, 12, 13,) are not published by him as 

 veritable species (at least they are not referred to in the descrip- 

 tive portion of his work), but given as copies of the Patella Zet- 

 lantica (Turt. Diction, p. 142), and marginata of Dr. Fleming's 

 article on British shells, in the " Edinburgh Encyclopaedia " (pi. 

 204, f. 5, 6). The author has virtually withdrawn these from 

 our Fauna by the absence of all reference to them in his sub- 

 sequent, and very superior work ("British Animals"). Assu- 

 redly they are no Fissurellce and were probably (if the habitation 

 of mollusks at all) no more than fragments, or single valves of 

 Anomias. 



Vol. ii. p. 515. Trochus tumidus. 



The Trochus fuscus of English conchology (Adams, Microsc. 

 pi. 14, f. 24.— Mont. Test. Brit. p. 289.— Mat. and Rack. Trans. 

 Lin. Soc. vol. viii. p. 154) is solely derived from a wretched 

 figure in Walker's " Testacea Minuta," which was not improbably 

 designed to represent the T. tumidus. 



Vol. ii. p. 535. Margarita atjrea. 



Through the kindness of Sir Walter Trevelyan we have been 

 enabled to determine this species, by an examination of the 

 typical example. It is a Mediterranean species, described by 

 Philippi (Moll. Sicil. vol. i. p. 179 ; vol. ii. p. 151) as the Turbo 

 sanguineus of Linnoeus, and by Michaud (Bullet. Lin. Soc. Bor- 

 deaux, vol. iii. 1829, and Descript. Nouv. Coq. 1829, p. 6) as 

 Monodonta Bellvri. 



