ADDITIONAL NEW MOLLUSKS FROM SANTA ELENA 



BAY, ECUADOR 



By Paul Bartsck 



Curator, Division of Molhisks, United States National Museum 



In the Proceedings of the United States National Museum ^ I had 

 occasion to publish a short paper entitled " New mollusks from 

 Santa Elena Ba}^, Ecuador." In this 12 new species of Pyramidellids 

 and two of Melanellids collected by Dr. A. A. Olsson in Santa Elena 

 Bay, Ecuador, were described. The finding of so many novelties in 

 the little sending stimulated Doctor Olsson to further search and a 

 second sending, a mere teaspoonful of shells collected on the coast 

 southeast of Punta Santa Elena, Santa Elena Peninsula, Ecuador, 

 yields the many new forms here described, as well as some of those 

 contained in the last sending. 



Even with the addition of these species, we venture to say that only 

 a small fraction of the Pyramidellid and Melanellid fauna that the 

 region affords are made known, for in the equivalent geographic 

 faunal areas to the north these groups are wonderfully diversified, 

 and the material nov/ at hand promises that careful search will dis- 

 close a large number of additional forms. It is to be hoped too that 

 some one farther south will do a little sifting in suitable places so 

 that we may know something of the fauna of minute things which 

 so far has failed the attention of naturalists. 



The species described in the paper cited above are : 



Pyramidella {LoHgchaeus)clcnensis. Turbonilla {Pyrgiscus) nielea. 



Turbonilla {Chemnitzia} tJieone. Turhonilla (Pyrgiscus) evadna. 



Turbonilla {Chemnitzia) ccnoa. Turbonilla (Bartschella) semela. 



Turbonilla (Turbonilla) axeli. Odosfomia (Chrysallida) olssoni. 



Turbonilla (Strioturbonilla) evagone. Odostomia (Chrysallida) mclitta. 



Turbonilla (Strioturbonilla) nychia. MelaneUa (Melanella) olssoni. 



Turbonilla (Strioturbonilla) thyne. Melanella (Balds) elenensis. 



The only other mollusks belonging to these two families that have 

 been described from Santa Elena Bay were gathered by Hugh 



1 Vol. 66, art. 44, pp. 1-9, pis. 1-2, 1924. 



No. 2646.— Proceedings U. S. National Museum, Vol. 69, Art. 20. 



3098—26—1 1 



