Cushman: Desmids from New England 609 



ii. Closterium striolatum Ehrenb. 



Length 275 // ; breadth 27 // ; apex 12/i. Common, St. 

 Anthony. 



12. Closterium parvulum Nag. 



Length 115//; breadth 10 //. Common, St. Anthony. 



13. Closterium toxon West. 



Length 290-325/*; breadth 9-9.5//; apices 6 //. Fairly 

 common, St. Anthony. 





DOCIDIUM Breb. 1844 



14. Docidium Baculum Breb. 



Length 340 ft; breadth 21 // ; apex 13.3/*. Common, St 

 Anthony. 



PLEUROTAENIUM Nag. 1849 



15. Pleurotaenium coronatum (Breb.) Rabenh. 



Length 558 // ; breadth 60// ; apex 42 //. Common, Bay of 







Islands. 



16. Pleurotaenium Ehrenbergii (Breb.) DeBary. 

 Length 405//; breadth 30 // ; apex 22 //. Occasional, St. 



Anthony. 



TETMEMORUS Ralfs. 1844 



17. Tetmemorus Brebissonii turgidus Ralfs. 



Length 174-198//; breadth 40-44//. Abundant, Roseau Rue. 

 Tetmemorus Brebissonii minor DeBary, 

 Length 78 t u; breadth 18//; isthmus 13.5//. Common, St. 

 Anthony. 



Tetmemorus Brebissonii minimus W. & G. S. West. 



Length 62-65 M 5 breadth 1 5-16 //. Abundant, Rose au Rue. 



On second examination, the form from this locality, reported 



in the previous paper as T. minntus DeBary, should be placed here. 



18. Tetmemorus granulatus (Breb.) Ralfs. 



Length 190-204//; breadth 42-53//. Common at Bay of 

 Islands and St. Anthony. 



19. Tetmemorus laevis (Kiitz.) Ralfs. 



Length 133//; breadth 25 //. Common, Rose au Rue. 



