552 CusHMAN : Desmid flora of Nantucket 



15-16/i. Bog pond near Old North Cemetery; Copaum and 



Tom Never's Ponds. 



*C. BiREMUM Nordst Long. 13/i; lat. 12//. Wigwam and 



Tom Never's Ponds. 



C. INTERMEDIUM Delp. Long.* 48 /i: lat 42 /Jt: isthm. 14 fi. 



Reedy Pond, 



* C EXIGUUM Arch. Long. 23-24/i: lat. 13/^: isthm. 3-3.5 

 fi. Copaum Pond; also pond near Old North Cemetery. 



"*" C. GRANATUM SUBGRANATUM Nordst. Long. 2 1-23 /^ : lat 

 16-17 /i: isthm. 3.5-4.5/^. Copaum. Great Miox*s and Reedy 

 Ponds. 



C. Meneghinii Breb. Long, 19/^: lat 15, «: isthm. 4«. 

 Great Miox*s Pond. 



Xanthidium Ehrenb. 1834 

 X. ANTiLOPAEUM (Breb.) Kiitz. Long. c. spin. 71/i: s. sp. 



r 



46/^: lat. c. sp. 71/i: s. sp. 46 /i: isthm. 14//. Almanac Pond. 



Arthrodesmus Ehrenb, 1838 



A. ocTOCORNis P^hrenb. Long. c. sp. 2 5//: s. sp. 14/i: lat. 

 c. sp. 22//: s. sp. 14.5/^: isthm. 4//. Almanac and Pest House 

 Ponds. 



A. Incus (Breb.) Kiitz. Long. s. sp. 25 «: lat. c. sp. 84/i: 

 s. sp. 22 f2: isthm. y /i. Tom Never's Pond. 



Staukastrum Meyen. 1829 



S. macrocerum Wolle. Long. 46/i: lat. c. proc. 86/^: s. 

 proc. 22/.J. Wigwam Pond. 



S. STRiOLATUM Nag. Lat. 28/^. Wigwam Pond. 



* S. DiSTENiruM Wolle. Lat. c. proc. 34 /i. Pest House Pond. 



S. Lewisii Wood. Long. c. sp. 38/i: s. sp. 19 /^r lat. c. sp. 

 34/i: s. sp. 15.5/i: isthm. 4/7. Ahnanac and Wigwam Ponds. 



S. PYGMAKUM Breb. Long. 35/z: lat. 31/i: isthm. io,«. 



Gibb's Pond. 



S. Ravenei.ii Wood. Lat. c. sp. 50/^: s. sp. 45/^: isthm. 

 14 «. Great Miox's and Pest House Ponds. 



w 



Sphaerozosma Corda. 1835 



S. EXCAVATUM Ralfs. Long. cell. 7.5/i: lat y/x: isthm. 3.5 

 ft. Wigwam Pond. 



