THE NAUTILUS. 81 



f Shell oval, umbonal region inflated, beaks prominent, pos- 



1 ,, j terior ridge rounded propinqua. 



I Shell subquadrate, umbonal region compressed, beaks flat- 

 tened, posterior ridge biangulate biemarginata. 



C Shell larger, solid, margin of marsupial expansion simple. 18. 



17. < Shell much smaller, thinner, margin of marsupial expansion 



( dentate 19. 



Shell subquadrate, marsupial expansion small, posterior mar- 

 IQ J gi subtruncate, umbonal region greatly inflated, sampsoni. 

 Shell oval, marsupial expansion larger, posterior margin 

 regularly rounded, umbonal region less inflated . rangiana. 



Shell obovate, marsupial expansion extending below the base 

 line, beaks depressed, dorsal slope rounded . florentina. 

 19. ( Shell subtriangular, marsupial expansion not extending be- 

 low the base line, beaks prominent, dorsal margin ele- 

 vated . deviata. 



SHELLS FROM THE BAY OF CADIZ REGION. 



BY MAXWELL SMITH. 



While on a recent visit to Spain I arranged to spend three days 

 on the shores of the Bay of Cadiz in hopes of contributing toward 

 the knowledge of its molluscan fauna. With the limited time at my 

 disposal only a superficial inspection of the beaches could be made, 

 but the results were so satisfactory, although yielding only a com- 

 paratively small series of species, that I felt that I was indeed amply 

 repaid. 



By comparing the list which follows this article it will be seen that 

 the material brought together is a curious mixture of Mediterranean, 

 African and Atlantic shells. Just what lives in the bay, and what 

 not, can only be determined by .careful dredgings. 



Through the kindness of Mrs. Whishaw, of Seville, her summer 

 home, an old palace dating from the 16th century, was placed at our 

 disposal. This was located on the shore of the Bay of Cadiz at the 

 town of Port Saint Mary, or Puerto de la Santa Maria as it is called 

 in Spanish. 



It was on April 30 of this year that we left the heat of Seville and 

 rode by train through this rich wine-growing section of the country 

 down to the bay. Port Saint Mary was found to be a typical Spanish 



