PYEAMIDELLA.— Plate IV. 



The striation is so lii>-ht and minute as to escape obser- 

 vation unless the lens be used, but the flattened whorls 

 and impressed suture serve to distinguisli this nearly 

 white thin shell. It has a rounded or papillary spire. 



Species 29. (Mus. Cuming.) 



Pyramidella achates. Fyr. testa oblongo-subcylindra- 

 ced, lavi, oblmd, pallidi fulvd, aiifractihus circa octo, 

 plamdatis, ad suturam subelevatis, titedio prope sutii- 

 ram lined impressd cincfis, supra fascia alba, medio 

 et infra flammnlis fiiscis seriatim variegatis, suturd 

 profunda, aperturd oblongd, columella subrectd, iri- 

 plicatd, labro aiitice vix expanso. 



The agate Pyramidella. Shell oblong-cylindrical, 

 smooth, obtuse, pale-brown, whorls about eight, flat, 

 slightly raised at the suture, girt with an impressed 

 line in the centre near the suture, variegated with a 

 white band above, and rows of flame-like markings 

 of brown in the centre and below, aperture oblong, 

 columella nearly straight, triplicate, outer lip slightly 

 expanded in front. 



ftoULD. 



Cerithium clavulus, A. Adams, Sowerby's Thes. 

 Conch, sp. 25. 



llab. Acapulco (on the sands) ; Col. MofFatt. 



A beautifully-painted Pupiform species. 



