86 PROCEEDINGS OF THE ACADEMY OF [1889. 



Mr. Mazyck, of Charleston, S. C, has also published a note upon 

 H. berraudensis, since my own paper was issued, and I am indebted 

 to him for a copy of it. H. bermudensis is recognized by Mazyck 

 as the type of a new genus, Juno, which of course becomes a synonym 

 of Pcecilozonites. 



Mr. C. F. Ancey has likewise bestowed a subgeneric name upon 

 H. bermudensis; and I suppose that for some years to come we will 

 have an annual harvest of " genera " for one or another member of 

 this little group ! I would suggest that P. circumfirmatus or P. 

 reinianus be selected as "types" for future "genera," as the syn- 

 onymy of bermudensis is becoming inconveniently cumbersome! 



The synonymy of Pcecilozonites is as follows : 



Helix Pfeiffer, Monographia Heliceorum Viventium i, p. 188, and 

 of most authors. 



Hyalinia Pfeiffer-Clessin, Nomenclator Hel. Viv. p. 69. 1881. 



Hyalosagda Pfeiffer-Clessin, Noment. Hel. Viv. p. 75. 



Sagda (Hyalosagda) Tryon, Manual of Conchology, 2d series, iii, 

 p. 9. 



Trochomorpha Albers, Die Heliceen, 1850, p. 116. 



Caracolus Albers-Martens, Die Heliceen, 1860, p. 156. 



Zonitesf and Microphysaf W. G. Binney, Ann. N. Y. Acad. 

 Sci. iii, p. 86, 105. 



Pcecilozonites Bottger, Jahrb. f. Min. Geo!, u. Paleont. 1884, 

 ii Bd., p. 139. 



Pcecilozonites (" Sandb") Tryon, Manual of Conchology, 2d series, 

 iii, p. 19, 95. 



Bermudia Ancey, Conchologists' Exchange, i, p. 53, 1887. 



Juno Mazyck, Proc. Elliott Soc. Nat. Hist., 1888, p. 210 (issued 

 Mar. 19, 1889). 



Pmcilozonites Pilsbry, Proc. Phila. Acad. Nat. Sci. 1888, p. 285. 



H. bermudensis Pfr. is the type of the three genera — Pa'cilozonites, 

 Bermudia and Juno. 

 Bythinella sequicostata Pilsbry. PI. Ill, fig. 16. 



Shell sub-imperforate, narrow, elongated, composed of about 6? 

 very convex whorls, separated by profound sutures ; the spire is long, 

 tapering, a trifle obtuse at the apex. The color is corneo-olivaceous ; 

 the whorls are slightly marked by delicate growth-lines. The spire 

 has longitudinal low, fold-like ribs, which are sometimes nearly ob- 

 solete upon the body-whorl. Aperture oval or somewhat quadrate 

 in outline, less than one-third the length of the shell ; peristome 



