112 THE NAUTILUS. 



Alectrion obsoleta was everywhere very abundant, the shell reach- 

 ing a length of an inch, and occasionally having the surface 

 largely eaten away. One was found with a prominent, biangu- 

 late carina just above the center of the body whorl so that it 

 appears immediately above the suture on the penultimate whorl, 

 becoming obsolete half way around that whorl. The other 

 shells found, not including the countless fragments, were: 



Macoma balthica (Linne) few, mostly young. 



Mya arenaria Linne few, mostly young, 



Odostomia impressa (Say) few. 



Odostomia trifida (Totten) fairly common. 



Odostomia bisturalis (Say) few. 



Crepidula fornicata Linne occasional. 



Paludestrina minuta (Totten) rare. 



Lacuna vincta fusca Gould one. 

 The fossil shells include: 



Mya arenaria (Linne) few. 



Crepidula fornicata Linne few. 



Crepidula glauca convexa Say few. 



Crepidula plana Say rare. 



Bittium alternatum (Say) The only specimen found meas- 

 ures 7.25 mm. in length by 2.5 mm. in width and has 

 eight closely crowded spiral bands on each of the last two 

 whorls. 



Alectrion obsoleta (Say) abundant. 



Alectrion trivittata (Say) few. 



Urosalpinx cinerea (Say) occasional. 



At the base of the sand-spit there is a small influx of sand 

 where the waters of the bay have been cutting across during 

 the last two or three years, and a new fauna is being introduced 

 consisting of: 



Venus mercenaria Linne young. 



Gemma gemma purpurea (H. C. Lea) abundant. 



Mya arenaria (Linne") few. 



Ensis directus (Conrad) few. 



Crepidula fornicata Linn few. 



Alectrion obsoleta (Say) occasional. 



