70 THE NAUTILUS. 



labelled amtissitata while genuine avmssitata came as toreuma. I 

 am by no means satisfied in my own mind, however, that the two 

 last named are not one and the same species. 



If. encosmius is a very distinct and easily recognized species and 

 varies very little compared with other species of the genus. The 

 figures in Reeve (Conch. Icon. pi. xvi, p. 36) are good and so are 

 all those in the Manual of Conchology (vol. xiii, plate 71). 



Mr. Pilsbry in the Manual points out that Reeve applied the 

 name P. variegata to two different species. The first described in 

 Conchologia Systematica which appears to equal rota of Graeliu 

 and the other in Conchologia Iconica twelve years later, this last 

 being the species Mr. Pilsbry now names H. encosviius on the 

 ground that the name variegata is preoccupied by Blainville for an 

 unidentified species from Botany Bay. 



So far, so good, but Mr. Pilsbry next proceeds to quote as a syno- 

 nym for his encosmius, H. variegatiis Dall, Amer. Jour, of Conch., 

 vi, p. 277, but this was Reeve's first variegatiis -= rota Gmel., as 

 Dall himself surmised. Consequently Dall's localities (which 

 Pilsbry has copied) are clearly incorrect when applied to encosmius- 



My own impression is that the true H. encosmius Pilsbry (-.z^vari- 

 egatus Rve., Conch. Icon., pi. xvi, f. 36) is a sjiecies restricted to 

 Japanese and Chinese waters, while the localities " Suez (Fischer) 

 and Red Sea and Gulf of Akaba (Smithsonian Cabinet)," given 

 by Dall and copied into the Manual are correct for rota Gmel. (= 

 variegatiis Rve., Conch. Syst. ii, pi. 136, p. 1). 



The remaining locality given in the Manual, viz., "Australia" 

 (Rve.), is also, I think, an error, although I have received from 

 dealers specimens of encosmius which they assured me had come 

 from there. 



I should have mentioned above that although Dr. Dall in his 

 paper in the American Journal of Conchology is writing evidently 

 of rota, not of encosmius, he quotes both of Reeve's figures as 

 though referring to the same species. 



[Co MM II NIC AT EI). 1 



AMERICAN ASSOCIATION OF CONCHOLOGISTS. 



Philadelphia, Sept. 28, 1892. 

 Since the publication of the list of members, there have been 

 admitted to the Association, the following ncAV members : 



