BY C. HEDLEY. 707 



Zool. Astrolabe, iii., 1834, p.328, P1.68, f. 11-14; Id., Angas, Proc. 

 Zool. Soc, 1865, p. 185. Subemarginula australis Shirley, Proc. 

 Roy. Soc. Q'land, xxiii., 1911, p.96. 



In 1819, De Blainville described a shell from the collection of 

 Valenciennes, as Emaryi7iula suhertiarginata. He noted it as 

 an aberrant member of the genus, and, in a subsequent review, 

 formed a section "C" to receive a species, emargiiiata, with the 

 peculiarities of suhemarginata. That the second name was a 

 substitute for the first, is shown by the reference of its popular 

 equivalent, Emarginule echancree, in the explanation of Concho- 

 logical Plates 68, both to Vol.xiv.(s?A6emar^?'nato) and Vol.xxxii. 

 [emarginata). 



Transferring the scheme of classification of Emarginula from 

 the Dictionary to the Manual, Blainville bestowed upon section 

 "C" a popular designation, "Les Submarginules." His arrange- 

 ment was copied by Rang. This popular French term has uni- 

 versally, but erroneously, been accepted as the introduction of 

 the generic name '''■Subemarginula.'^ Actually, Gray* seems to 

 have been the first to give Blainville's coinage a Latin form, in 

 1847, while Herrmannsenf was perhaps the first to advance it 

 acceptably. 



Meanwhile, Hemitonia was interposed in correct form by 

 Swainson, in 1840, with tricostata Sowerby, as the type.j But 

 Scudder stated that IIemitom,a was anticipated, in 1820, by 

 Ratinesque, for a mollusc. Accepting this statement, which I 

 cannot verify, we proceed to consider the next candidate. 



Recognising " Les Subemarginules" "as a very natural group," 

 Recluz proposed, in 1843, "to give this new genus the name of 

 Montfortia, in honour of Denis de Montfort." His evident 

 intention was to treat snbemargiuata as the type, and this, if it 

 is necessary, it is now declared to be. 



Blainville was unacquainted with the origin of his shell, 

 Adams assigned it to Honduras, and Pilsbry to the Florida Keys 



*Gray, Proc. Zool. Soc, 1847, p. 147. 



fHerrmamisen, Index Geii. Make, ii., 1849, p.520. 



J Swainson, Treatise on Malacology, 1840, p. 356. 



