170 PROCEEDINGS OF THE ACADEMY OF [1888. 



Upper Ter-tiary Invertebrates from West side of Chesapeake Bay. — 

 Dr. Otto Meyer made some remarks on Upper Tertiary inverte- 

 brates. Dr. Benjamin Sharp had given him for examination a 

 specimen of Balanus eoncavus Bronn, which had been collected by 

 Dr. J. Alban Kite, on the west side of Chesapeake Bay. The 

 Balanns has a diameter of two inches. Its tergum has a long 

 spur as in the specimens of Balanus eoncavus from the English Crag ; 

 the parietes, however, are smooth, while the Crag specimens are rib- 

 bed. The scutum is less elaborately sculptured than a scutum of 

 the same species from Yorktown Va. in his collection. 



The inside of this Balanus was filled with sand containing shells 

 etc. From this sand he had picked out the following species. 



GASTROPODA. 



Crucibiilum costatum Morton, Adeorbis concava H. C. Lea, sp., 



Crepidula fornicata Lam., Cerithiopsis terebralis Adams, 



Natica sp. = G. clavulus H. C. Lea, sp. 



Caecum trachea Montagu, Eulima eborea Conr., 



= C. annulatum Emmons, Urosalpinx cinereus Say, 



= C. pulchellum Stimpson, Pleurotoma marylandica Conr.? 



Nassa trivittata Say, Tornatella ovoides Conr. 

 Trochus lens H. C. Lea, sp., 



LAMELLIBRANCHIATA. 



Pecten eboreus Conr., Cardium sp., 



Lucina crenulata Conr., Mactra sp., 



Venus cortinaria Rogers, Aligena laevis H. C. Lea, 



'Corbula cimeata Say, Aligena Sharpi n. sp. 



BALANIDAE. 



balanus eoncavus Bronn. 

 ■Cythere sp. 



OSTRACODA. 



FORAMINIFERA. 



(Determined by Mr. A. Woodward.) 

 Miliolina seminuluni Linn, sp., Gaudryina pupoides d'Orbigny. 

 Polymorjohina compressa d'Or- 

 bigny, 



These determinations were made partly from fossil specimens in 



Dr. Meyer's collection, partly from recent species in the collection 



■X)f the Academy and he is obliged to the Conservator of the Con- 



,chological Department of the Academy, Mr. H. A. Pilsbry, for 



giving him the opportunity to compare them with the recent 



forms. The names are not intended to be the final ones, for most 



..species of shells have not only been described as recent forms but 



-..they have frequently had other names as fossils given them, and 



.sometimes quite a number of names, and it will be a very great 



rtask to determine the final synonymy of the tertiary and recent 



species. 



