612 Cushman: Desmids from New England 



COSMARIUM CONTRACTUM ELLIPSOIDEUM (Elfv.) W. & G. S. West 



Length 33.5 /*; breadth 27/1; isthmus 8 ft. Common, St. 

 Anthony. 



39. Cosmarium Hammeri Reinsch. 



Length 41 fx ; breadth 32 jx ; isthmus 12 fx. Occasional, Bay 



of Islands. 



40. Cosmarium Nymannianum Grun. 



Length 43 jx ; breadth 20 fx ; isthmus 8 [x. Common, St. 

 Anthony. 



41 • Cosmarium granatum Breb. 



Length 27 /x ; breadth 20 fi ; isthmus 7 //. Common, St. 



Anthony. 



42. Cosmarium pseudonitidulum Nordst 



Length 53/*; breadth 42//; isthmus 12 [X. Occasional, Bay 

 of Islands. 



43. Cosmarium pyramidatum Breb. 



Length 87//; breadth 56//; isthmus 19 fx. Common, St 

 Anthony. 



44. Cosmarium pseudopyramidatum Lund. 



Length 50-56 /i; breadth 31-33/4; isthmus 9-10//. Very 

 common, Rose au Rue. 



45. Cosmarium venustum (Breb.) Arch. 



Length 37 fx ; breadth 26 fx ; isthmus 6.5 [x ; apex 1 5 //. Com- 

 mon, St. Anthony. 



46. Cosmarium connatum Breb. 



Length 72 ft ; breadth 56 (i ; isthmus 45 ft. Rare, St. Anthony. 



47. Cosmarium impressulum minor Turner. 



Length 16 jx ; breadth 12 fx ; isthmus 3.5 //. Common, Rose 

 au Rue. 



48. Cosmarium subspeciosum Nordst. 



Length 50 fx ; breadth 40/* ; isthmus 18.5 //. Occasional, St 

 Anthony. 



