CusiTMAN : Desmid flora of Nantucket 561 



EuASTRUM Ehrenb, 1832 



E. DiDELTA (Turp.) Ralfs. Long. 125//: lat. 65/^: lat. lob. 

 poL'26/i: isthm. i8/i, Gibb's Pond. 



E. AFFiNE Ralfs. Long. 112 ji\ lat. 68 /i: lob. poL 28 /i: 

 isthm. 19//. Wigwam Pond. 



E. PfNNATUM Ralfs. Long. 100 /j. Wigwam Pond. 



E. ABRUPTUM forma minor W. & G. S, West Long. 25-33 

 jx\ lat. 22//: lob. pol. 14//: crass. 14/^: isthm. 4.5/^. Gibb's 

 and Wigwam Ponds. 



E. OBLONGUM (Grev.) Ralfs. Long. 160-170 /i: lat. 72-84//: 

 lob. pol. 45-47/^: isthm. 20—23/^. Hummock Pond and pond 

 near Old North Cemetery. 



E. BiNALE Ehrenb. Long. 19/^; lat. 15.5//: lob. pol. 13//: 

 isthm. 3.8//. Wigwam and Tom Never's Ponds. 



* E. FissuM W. & G. S. West, forma. Long. 40/^: lat 2>1>I^' 

 isthm. 6//. Wigwam Pond. 



E. ELEGANS (Breb.) Kiitz. Long. 43-48/4: lat, 30-32 />«; lob. 

 pol, 24-25 />«: isthm. 8/^ Gibb's and Tom Never's Ponds; also 

 pond near Old North Cemetery. 



MlCKASTERIAS Ag. I 827 



M. TRUNCATA (Corda) Breb. Long. 95/^: lat 87 /i: lob. puh 

 65 /i : isthm. 22 /i. Squam Pond. 



M.AMERICANA RECTA Wolle. Long. ii5,«: lat. 90;^: lob. 

 pol. S^ii: isthm. 28 /i. Pond near Old North Cemetery. 



CosMARiUM Corda. 1834 



C. ORNATUM Ralfs. Long. 34-48 /i: lat. 34-36/^: isthm. 11- 

 l2/i. Wigwam and Copaum Ponds. 4 



C. AMOENUM Breb. Long. 47/^: lat. 25 /i. Wigwam and 



Almanac Ponds. 



C. TAXiCHONDRUM Lund. Long. 44//: lat. 42 /i; isthm. 



I2.^fjt. Wigwam Pond. 



C. coNNATUM Breb. Long. S9/i: lat. 43 /i: isthm. 40 /i. 



Almanac Pond. 



* C. PHASEOLUM forma ELEVATUM Nordst. Long. 32 /i: lat. 



25/i: isthm. 8/i. Great Miox's Pond. 



C. PYKAMiDATUM Breb. Long. 78-100// : lat. 50-62/^ : isthm. 



