264 ATYS. 



p. 585, pi. 124, f. Ill, and SOWB., Conch. Icon. f. 3 (not of Quoy & 

 Gaimard). Atysfreyi BRANCSIK, Jahresh. Trencs. Com. xiii, p. 80. 

 Atys oborata MKI:., Mai. Bl. 1854, p. 46; Moll. Nov. Holl. p. 75. 



Large specimens of this species are thinner than smaller adults ; 

 and examples of any size frequently develop an obtuse keel above 

 the middle. Adams' A.ferruginosa (pi. 28, figs. 14, 15) is longitu- 

 dinally marked with brown. Brancsik has described specimens 

 from Nossi-be as A.jreyi (pi. 32, fig. 37) ; they are solid and free 

 from spiral incised lines in the middle ; but some from Singapore 

 before me agree in this, which seems to be only an individual vari- 

 ation. The ^4. obovata of Menke (ovoidea Adams and Sowb), shown 

 in fig. 16 of pi. 28, is a stunted form of this species. 



A. MUSCARIA Gould. PI. 28, fig. 20. 



Shell minute, ovate-elliptical, thin, greenish, ornamented with 

 transversely arranged brown dots, cut with striae above and below ; 

 vertex funnel-shaped, imperforate. Aperture narrow, effuse in 

 front, lip produced backward, toothed; coiumella short, twisted. 

 Alt. 4, diam. 2 mill. (Gld). 



China Sea* (Stimp.). 



Atys muscaria GLD., Proc. Bost. Soc. N. H. vii, p. 138. Sown., 

 Conch. Icon. f. 5. 



A. TORTUOSA A. Adams. PL 33, figs. 66, 67. 



Shell ovoid, produced at both ends, yellowish, pellucid, umbili- 

 cated, anteriorly and posteriorly transversely striated ; outer lip 

 posteriorly strongly twisted; inner lip anteriorly straight, with a 

 single fold {Ad.). 



Camaguin, Philippines (Cuming) ; Torres Strait (Brazier). 



B. (A.) tortuosa AD., Thes. p. 587, pi. 125, f. 120. SOWB., C. Ic. 

 t. 2, f. 15. BRAZIER. P. L. S. N. S. W. ii, p. 87. 



A. AMPHORELLA A. Adams. Unfy/ured. 



>hell ovoid, ventricose, somewhat gibbous in the middle, rimate, 

 thin, smooth, shining, buff, narrowed anteriorly, subacuminate poste- 

 riorly ; inner lip nearly straight, slightly truncated in front ; outer 

 lip arcuate, posteriorly produced, tortuous, rounded .!</., Ann. 

 Mag. (3), ix, p. 158). 



Lo-shan-kow and Shan-tuna, China. 



A tijs tortuosa A. Adams, is the nearest approach to this species 

 which, however, is not striated, and the outer lip has not the spiral 



