92 THE NAUTILUS. 



Callocardia morrkuana (Liusley). At 1 and 5. 



Venus mcrccnaria Liimaeus. Becoming less common. 



Venus mercenuria notata Say. True form very rare. 



Gemtna gemrna (Totten). Generally distributed. 



Gemtna gemma purpurea (H. C. Lea). Different habitat 

 than preceding. 



Petricola pJioladiformis Lamarck. Generally distributed. 



TelUna tenera Say. Fine specimens at 1. 



TelUna tenella (Verrill). One valve at 1. 



Tellina versicolor De Kay, Fine specimens at 5. 



Macoma balthica (Linnaeus). Commonest at 2. 



Tagelus gihbus (Spengler). At 5. 



Etisis directus (Conrad). Generally distributed. 



Siliqua costata (Say). Found only at 5. 



Spisula solidissinm (Dilhvyn). Very abundant at 4. 



Spisula solidissima similis (Say). Occasional. 



Mulinia lateralis (Say). Generally distributed. 



Mya arenaria Linnaeus. Generally distributed. 



Corbula contracta Say. Found only at 5. 



Barnea truncata (Say). At 1, 3 & 5, but especially common 

 at 3. 



Zirfaea cripata (Linnaeus). One valve at 5. 



Teredo navalis Linnaeus. At 5. 



Gasteropoda. 



Dentalium sp? Fragment at 5. 



Pyramidella fusca (C. B. Adams). Several specimens at 5. 



Pyramidella winkleyi Bartsch? Two or three specimens 

 which seem to be this species. 



TurhonUla nivea (Stimpson). Only at 5, where it is the 

 commonest Turhooiilla. 



TurhonUla aequalis (Say). I have referred 7 of my speci- 

 mens to this species. 



Turbonilla vinea Bartsch. Two specimens from 5. 



TurhonUla areolata Verrill. One specimen, but with six 

 rather than five spiral rows of pits, from 5, 



Turho^iUla interrupta (Totten). This is the typical form, 

 not as described by Bartsch, but as described by Bush. The 



