268 ATYS. 



end truucated. Alt. 5, diani. 3 lines. There is the trace of a me- 

 dian gibbosity (Ehreiib.). 



Djedda, Red Sea. 



Bulla suecisa 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, longitudinal]}" stri- 

 ated, i^osteriorly subtruncated, anteriorly produced ; outer lip 

 rather straight ; inner lip anteriorly strongly truncated, ending in 

 a tooth-like plait (Ad.). 



B. (Aty.^) nonscri2^ta Ad., Thes. p. 588, pi. 125 f. 125. — A. non- 

 scripta 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 unhiown. 

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



A. AMYGDALA Sowcrby. 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 (Sowb.). 



Habitat unhioum. 



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 strire 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. (Gld.). 



Kayosima Bay, Jajmn. 



Atys porcellana Gld., Proc. Bost. Soc. N. H. vii, p. 138. — Sow^b. 

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



