VERTIGO. 367 



I hope I may be excused saying a few words here 

 about the correct name of this species, as regards myself. 

 It is an invidious and unpleasant task to vindicate one^s 

 own supposed discoveries ; but it is at the same time 

 useful to the cause of Science, and in some respects re- 

 sembles the duty of a parent in defending his children. 

 As our Continental neighbours and friends would say, 

 " il faut faire une reclai^ation." 



In the ^ Linn can Transactions' for 1830 I proposed 

 the present species and gave it the name of ''angustioVy'' 

 accompanied by a full description, in Latin, of its specific 

 characters. I also noticed particularly the contour of 

 the shell, the shape of the aperture or mouth, and the 

 position of the teeth, in comparison with those characters 

 in V, pusilla. In the following year Michaud described 

 and figared the same species in his Supplement to Dra- 

 parnaud^s posthumous work, under the name of V. nana. 

 In the ^ Isis ' for 1837, Held also described the shell 

 and gave it the name of V. liamata. In 1838 Professor 

 A. Miiller again described and figured it in ^ Wiegmann's 

 Archiv ' as V. plicata. And, in order that this mite of 

 a shell should have as many names as any Spanish 

 Hidalgo, Rossmassler in 1839 redescribed and figured 

 it in his ' Iconographie,' and adopted Charpentier's MS. 

 name of V. Ve^ietzii. This last name has been used by 

 the authors of the ' British Mollusca ' ; and Held^s 

 name of plicata has been adopted by Moquin-Tandon, 

 under an erroneous impression (originating apparently 

 in a typographical error in Rossmassler's work) that 

 the number of the ' Isis ^ which contained the latter 

 name was published in 1828, and not in 1838. I have 

 ascertained, by an examination of Michaud's and Char- 

 pentier's types, that their species are the same as mine. 

 I have also no doubt of the Turho vertigo of Montagu, 



n2 



