VOL. XIV, T 

 1891. J 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



176. Natica unifasciata Lam. 



329 



? = N. maroccana Chein. var. 



Two specimens. 



Panama. 



Carpenter inclndes this, and no doubt properly, in bis synonomy of 

 Natica maroccana Chem. (Maz. Cat. sp. 570) as variety b. It is by no 

 means a certainty as to wliether Chemnitz's name or Lamarck's was 

 originally applied to West American shells. There will be less con- 

 fusion, however, to let these names remain as they now stand than to 

 make a change that will probably bring us no nearer to the facts. 



177. Natica (Ruma) otis B. & S. 



One specimen, bleached, but perfect. 

 Payta. 



178. Sigaretus concavus Eve. 



= S. Graiii Desh. 

 = iS. cymhia Mke. 

 = «S. maxim IIS Phil. 



Several specimens. 

 Payta. 



Varies much, as do many of the related Naticas. Tryon credits this 

 species to San Pedro, California. (Manual, Vol. viii, p. 55.) 



Two examples. 

 Payta. 



179. Patella araucania Orb. 



180. Acniaea scutum Orb. 



One beach shell from each place. 

 Payta; Chatham Island. 



181. Acmaea Preteri Orb. 



A single specimen. 

 Payta. 



The solitary beach shell which is here catalogued, though much 

 rubbed, nevertheless exhibits the characteristics of this species. 



182. Turbo magnificus Jonas. 



Several specimens. 

 Callao; Payta; Manta. 



This form suggests a smooth-surfaced variety of the more northerly 

 tesseUatus or fiuctuosus. 



183. Turbo (? Senectus^ squamiger Reeve. 



Several examples ; beach. 

 Payta ; Manta. 



This is a rare species, and it may belong in the group Callopoma. 

 The national collection series exhibits an extended range, stretching 



