464 GEOLOGICAL SURVEY OF NEW JERSEY. 



B. Baileyi, W. Sm. 



Marine. Mon mouth : Occasional on algae and in marine 

 mud. Shark River, Manasquan River, and Shrewsbury River ; 

 fossil in Ocean Beach elay. Atlantic : Atlantic City. 



B. laevis, Ehrb. 



Marine. Atlantic : Occasional on algae and piling at Atlantic 

 City. Mon mouth : Fossil in Ocean Beach clay ; abundant on 

 piling in Shrewsbury River. 



B. pulchella, Gray. 



Marine. Common on algae and in salt-water mud. Mon- 

 mouth : Manasquan River, Shark River, Shrewsbury River ; 

 fossil in Ocean Beach clay. Cape May. Atlantic: Atlantic 

 City. 



B. Rhombus (Ehrb.), W. Sm. 



Marine. Common in marine mud. Monmouth : Manasquan 

 River and Shark River ; fossil in Ocean Beach clay. 



B. turgida, W. Sm. (Cerataulus turgidus, Ehrb.) 



Marine. Rare in marine mud. Monmouth : Shark River 

 and Manasquan River ; fossil in Ocean Beach clay. 



TRICBRATIUM, Brightwell. 

 T. alternans, Bailey. 



Marine. Occasional in marine mud. Cape May. Monmouth : 

 Manasquan River and Shark River ; fossil in Ocean Beach clay. 



T. favus, Ehrb. 



Salt or brackish water. Caraden : Occasional in Delaware 

 River mud as far north as Camden ; not uncommon in Camden 

 water-supply. Monmouth : Fossil in Ocean Beach clay ; com- 

 mon in marine or brackish mud from Shark River and Mana- 

 squan River. Atlantic : Atlantic City. Cape May : Dennis 

 Creek and Cape May. 



T. punctatum, Brightw. 



Marine. Generally distributed along the coast Lewis. 



T. undulatum, W. Sm. 



Marine. Camden : Rare in Delaware River mud Lewis. 



