IKKDALE : 0^S MISUSED GEXKltlC NAMES. 301 



Walker's figure 61 for Montagu's species. Walker's book, the 

 correct quotation for wliich is Boys & Walker, Test. min. rar., 1784, 

 is non-binomial, but in the second edition of the Essays on the 

 Microscope by G. Adams, Kanmacher added a chapter on minute 

 shells, and stated that the correct names had been given him by 

 Jacobs. A plate is given, and the figures are copies of those provided 

 by Boys & Walker. There, on pi. xiv, fig. 27, appears a copy of 

 their fig. 61, and in the text, p. 639, it is named Valuta alba. This 

 is followed by Bulla refjulhiennis, so even if it were concluded that 

 these were the same, the former lias priority. 



The correct name for the type of Retusa, then, is Voluta alba, 

 Kanmacher, Essays Micros. (G. Adams), 2iid ed., p. 639, pi. xiv, 

 fig. 27, 1798 (fo; Jacobs MS.). If it were admitted that Retuna could 

 be difPerentiated from Tornatina, then Retusa would displace 

 Turnatina in the British List, whilst Tornatina "would more probably 

 come into use, vice Retusa as used by Hedley, as quoted above. 



Phacoides, Blainville. 



This name was used by Hedley for Australian molluscs, and when 

 I first tioted it I had recognized no shells similar to Hedley's species. 

 Working through the article "Mollusques" in the Diet. Sci. Nat. 

 (Levrault), vol. xxxii, where Blainville reviewed the whole group, 

 and which is the basis of the Manuel published the following year, 

 I noticed the name. Before proceeding further it may be of interest 

 to record the actual dates of publication of these two works. Tlie 

 32nd volume of the Diet. Sci, Nat. was acknowledged in the 

 Bibliographic de la France on November 13, 1824. In the same 

 record for October 22, 1825, I find the Manuel " In 8^° de 41 feuilles 

 plus 2 tableaux et 20 planches (formant la premiere livraison des 

 planches). Ce volume contient la texte entier de I'ouvrage". On 

 December 28, 1825, is added, " Deuxieme livraison . . . Tout le 

 text a ete delivre avec la premiere livraison de planches." The date 

 of publication of the Diet. Sci. Nat. is stated by Blainville in the 

 preface to the Manuel as "commencement d'octobre de I'annee 

 derniere ". I make this note as commonly the Manuel is quoted 

 instead of the Diet. Sci. Nat., whereas tlie former is simply a reprint 

 of the latter as regards the bulk of the work, the additions and 

 corrections being separately added. 



Deducing Dall's initiative as the basis of Hedley's usage, 

 I referred to the monumental Tertiary Mollusca of Florida (Trans. 

 Wagner Free Inst. Sci. Philad., vol. iii, 1903, p. 1359), where I found 

 Phacoides used, the basis being given as Blainville, Manuel. That is, 

 however, simply a reprint of the Diet. Sci. Nat., p. 334, where 

 appears " Lucine. Lticina " ; divided into five sections, each 

 diagnosed and named thus : — 



"A. Diagnosis (Les L. Phacoides). 

 B. ,, (G. Loripede, Poll). 



C. 



D. ,, (G. Amphidesme, Lamck.) 



E. ,, (G. Fimbria, Megerle; Corbeille, Cuv.)." 



