THE NAUTILUS. 55 



XVIII, fig. 2, the same authors had redescrihed and figured this 

 8h«'ll accepting A'jatha as a valid subgenus of Pyraniidella. They 

 gave full references and concluded with "P. {A.) virgo A. Ad. is 

 the type of Agatha; we do not know why Adams changed this to 

 Myonia and Amiithis as we have been unable to find the name pre- 

 occupied." 



The references they give provide the solution ot their puzzle. 

 When A. Adams described Agatha virgo^ he did not introduce a new 

 genus, as after the description he wrote " may well be regarded as 

 the queen of a genus of which all the species are lovely." This 

 indicates that a genus with a number of species known to him and 

 already described was in his mind. This is confirmed later by the 

 remark " Myonia virgo is a third species of Meiies^ho."^ These two 

 papers were written from Japan, and immediately upon receipt of 

 the first one he corrected the error thus, " generic name should hare 

 been Myonia not Agatha.'^ ^ 



He then introduced Amathis* and designated as type Myonia virgo 

 A. Ad. From the preceding it seems that Amathis should be 

 utilized, but a puzzling complication is introduced by the fact that 

 later Adams himself forgot his work and reintroducing Agatha re- 

 marks "of which A. virgo A. Ad. is the type."* 

 Dk Folin's Names. 



De Folin introduced many genera of his family Chemnitzidee and 

 these names are noted in Dal I and Bartsch's work. The history of 

 these names as well as the interpretation appears very imperfectly 

 known, and it would have been well had Dall and Bartsch gone 

 carefully into the literature. They appear to have handled the con- 

 chological work splendidly, and it is disappointing to have to find 

 fault with tiieir quotations. In a series entitled '' Les Fonds de la 

 Mer," which was issued in parts from 1867 onwards and is appar- 

 ently complete in three volumes, De Folin described a number of 

 Pyramidellids. New generic names were introduced without indica- 

 tion of their novelty. 



At the same time De Folin drew up a classification of the Chem- 

 nitzida which was published in tlie Ann. Soc. Linn. Maine et Loire, 

 Vol. XII, pp. 191 et seg., 1870. This appears to have escaped Dall 



» Annals, Ser. Ill, Vol. VI, 1860, p. 422. * Loc. cit., Vol. VII, 1861, p. 295. 

 *Loc. cit., Vol. VIII, Iftei, p. 142. *Loc. cit., Vol. VIII, 1861, p. 303. 



*ioc. cil.. Ser. IV, Vol. VI, 1870, p. 127. 



