268 ATYS. 



end truncated. Alt. 5, diam. 3 lines. There is the trace of a me- 

 dian gibbosity (Ehrenb.*). 



Djedda, Red Sea. 



Bidla succisa EHRENB., Symb. Phys., Bulla no. 5. COOKE, 

 Ann. Mag. (5), xvii, p. 131. 



May be a young A. cylindrica. 

 A. NONSCRIPTA A. Adams. PL 28, fig. 19. 



Shell ovately cylindrical, white, subpellucid, longitudinally stri- 

 ated, ' posteriorly subtruncated, anteriorly produced ; outer lip 

 rather straight ; inner lip anteriorly strongly truncated, ending in 

 a tooth-like plait (Ad.~). 



B. (Atys) nonscripta AD., Thes. p. 588, pi. 125 f. 125. A. non- 

 seripta SOWB., C. Ic. f. 23. 



A. ATTENUATA Sowerby. PL 28, figs. 26, 27. 



Shell minute, narrow, white, thin ; finely spirally striated at both 

 ends ; aperture narrow ; outer lip subtruncated, columella oblique, 

 subtortuous (Ad.). 



Habitat unknown. 



A. attenuata SOWB., C. Icon. t. 5, f. 29. 



A. AMYGDALA Sowerby. PL 33, figs. 71, 72. 



Shell subcylindrical, thin, dull white, concentrically finely stri- 

 ated near the ends ; longitudinally striated, rather narrow towards 

 the apex, rather inflated in the middle ; aperture narrow ; colu- 

 mella arched ; outer lip raised, acuminated (Soivb.). 



Habitat unknown. 



A. amygdala SOWB., C. Icon. t. 2, f. 6 a, b (1869). 



Resembling Atys elongata, it is yet, nevertheless, less cylindrical 

 than that species, and is slightly striated in the longitudinal direc- 

 tion (Sowb.). 



A. PORCELLANA Gould. PL 28, fig. 23. 



Shell small, thin, ovate-cylindrical, milk-white, grooved with 

 transverse striae increasing toward the ends ; apex funnel-shaped, 

 imperforate. Aperture narrow, widened in front, the base subtrun- 

 cate ; columella deeply arcuate, subperforate, provided with a strong 



callus. Alt. 12, diam. 5 mill. (<?.) 



Kagosima Boy, Japan. 



Atys porcellana GLD., Proc. Bost. Soc. N. H. vii, p.. 138. SOWB. 

 (as of Guildiug), Conch. Icon. f. 30. 



