268 ATYS. 



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

 dian iribbosity (Ehrcnb.*). 



Djedda, Red Sea. 



Bvlln nrt>i*i EHRENB., Symb. Phys., Bulla no. 5. COOKE, 

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



May bo a young A. cylindrica. 

 A. NONSCRIPTA A. Adams. PL 28, fig. 1'.'. 



Shell ovately cylindrica], 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. (Aty*) nonscripta AD., Thes. p. 588, pi. 125 f. 125. A. non- 

 srriptn Sown., 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 Sown., 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 (8owb.). 



ffabfatt unknown, 



A. amijydala 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 (Sicb.). 



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



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

 transverse stria? increasing toward the ends ; apex funnel-shaped, 

 in .perforate. Aperture narrow, widened in front, the base subtrnn- 

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

 callus. Alt. 12, diam. 5 mill. (Kid.). 



A'- />'"//, Japan. 



Aty* porcellana OLD., Proc. Bost. Soc. N. II. vii, p. 138. Sowjs. 

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



