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. 



(Acl). 



A. VOLVULINA A. Adams. Unfigured. 



Shell cylindric-ovate, rimate, acuminate and transversely striated 

 at both ends, the strife distant ; white, thin, opaque, shining. Aj^er- 

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

 outer lip regularly arcuate. (^Id.). 



Tsu-Sima, Japan, 26 fms. 



Alicula volvuUna 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) exlgua Ad., Thes., p. 589, pi. 125, f. 129.—^. e.vujua 

 SowB., C. Ic, f.'l9. 



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



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

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

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



Port Lincoln. 



B. {Atys) parvula Ad., Thes., ii, p. 590, pi. 125, f. 130. — A.par- 

 vula SowB., C. Ic, f. 25. 



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



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

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

 duced, anteriorly rounded ; inner lip anteriorly strongly twisted, 

 subtruncated. {Ad.). 



Port Lincoln, Australia. 



B. {Atys) hordeacea Ad., Thes., p. 590, pi. 125, f. 131. — A. hor- 

 dacea SowB., C. Ic, t. 4, f. 20. 



