fine net-work of elevated Imes; aperture rounded; canal 

 nearly an oblique fissure." Gould. 



Pasithea nigi'a Totten Sill. Joum. vol. 26. p. 369. 

 t. 1. f. 7. 



Cerithium reticulatum Totten ib. vol. 28- p. 352. 

 f. 8. 



Cerithium reticulatum C. B. Ad. Bost. Joum. 2. 

 p. 273. 



Cerithium Sayi Menke Gould Inv. Mass. p. 278. f. 

 183. 



Cerithium Sayi De Kay Nevr York p. 128. f. 167. 



Cerithium Sayi Stimps. Shells of N. Engl. p. 37. 



Bittium nigrum Gould ed. 2. p. 321. f. 590. 



Cerithium Sayi Mke. Sow. Thes. p. S6S. Nr. 82. 

 f. 149—151? 



Cerithium Sayi Sow. Eeeve Icon. 1865. f. 110. 

 Hab. Nantucket, Marthas Vineyard, New Bedford etc. 

 (Gould.) 



„The youngs are always reddish black, with a 

 very different aperture. The second years growth is 

 usually distinctly indicated by its much lighter colour. 

 (Gould.) 



234. Bittium iota C. B. Adams. 



„T. minima, atro-rubra; sutura profunda; anfr. 10 

 plicis decurrentibus tribus, (anfr. ultimi 4,) et plicis 

 longitudinalibus minoribus, intersectionibus nodiferis in- 

 structis; canali brevissimo. (Ad.) 



Spira3 long. 0,^35 poU. ; long. tot. 0,,^ poU. lat. 0,03 

 poll. 



Cerithium jota C. B. Ad. Bost. Proc. 1845. p. 5. 



Cerithium Sayi Menke Sow. Thes. Nr. 82. p. p. 



Cerithium Sayi Sow. Reeve Icon. f. 124. 

 Hab. Janzaica (C. B. Ad.) 



DifFert a prfficedente t. multo minore. 



Mal. Bl. XXIII. 1876. 7 



