270 ATYS. 



This is a small, grain-like, horn-colored species, with the apex 

 small and truncate, and the outer lip hardly produced beyond it. 

 (Ad.). 



A. VOLVULINA A. Adams. 



Shell cylindric-ovate, rimate, acuminate and transversely striated 

 at both ends, the strife distant ; white, thin, opaque, shining. Aper- 

 ture narrow ; inner lip obliquely .flexuous, thickened in front ; 

 outer lip regularly arcuate. (Ad.^). 



Tsu-Sima, Japan, 26 fins. 



Alicida volvulina AD., Ann. Mag. N. H., (3), ix, p. 159. 



A little, white shining species, acuminate at both ends, like a 

 Volvula, but with the sunken spire and twisted outer lip of an Atys. 

 (Ad.-). 



A. EXIGUA A. Adams. PI. 28, fig. 24. 



Shell small, elongately oval, posteriorly narrowed, white, shining, 

 longitudinally substriated, under the lens very minutely striated ; 

 aperture narrow, linear, anteriorly dilated ; outer lip posteriorly 

 produced, flexuous; inner lip subcallous. (Ad.}. 



Port Lincoln. 



B. (Atys) exigua AD., Thes., p. 589, pi. 125, f. 129. A. csiyua 

 Sown., C. Ic., f. 19. 



A. PARVULA A. Adams. PI. 28, fig. 18. 



Shell small, oval, white, shining, transversely entirely striated, 

 stride close together ; outer lip arched, posteriorly produced, ante- 

 riorly dilated ; inner lip slightly tortuous, subtruncated. (Ad.~). 



Port Liwohi. 



B. (Atys) parvula AD., Thes., ii, p. 590, pi. 125, f. 130. A.par- 

 ru/'i Sown., C. Ic., f. 25. 



A . HORDEACEA A. Adams. PI. 28, fig. 25. 



Shell small, oval, white, shining, transversely strongly entirely 

 striated, strife rather wide apart ; outer lip arched, posteriorly pro- 

 duced, anteriorly rounded; inner lip anteriorly strongly twisted, 

 subtruncated. (Ad.~). 



Port Lincoln, Australia. 



B. (Aty) / AD., Thes., p. 590, pi. 125, f. 131. A. hor- 



daceaSo\\\.., C, Ic., t. 4, f. 20. 



