186 



1 10. Cosmarmm ovale, Ralfs., p. 57, PL XIII. — Swamp back 

 of college woods. Aug. Very abundant. 1 16x203 //, some 



longer than recorded. 



111. (:". /zV/£-/«»z, Ralfs, p. 61, PL XVI.— With above. lOX 



■ 



18 }x. Common. Aug. 



112. C. nitidiilum, De Not, p. 62. PI. XVIIL— Moosehead 



Lake. July. Gathering by Dr. Young, 



113. C. Iceve, Rab., p. 62, PI. XV.— Form and size of this 

 species but the cytioplasm differently arranged. IS >^ ^^ ^' 

 Moosehead Lake. Dr. Young. July. 



114. C. undnlat7im, var. crenidatmn^ Wolle, p. 6^1, Pk XVI. 

 — Guagus Stream, July. Augusta. Dr. Young. 



115. C triplicatnm, Wolle, p. 73, Pk XIX.— Swamp back of 

 college woods. Our form is not typical, but too near to separate. 



116. C, conspersum, Ralfs, p. 75, PI, XIV. — Spring brook, 

 Orono. Our specimens are exactly like Wolle's fig. in form, but 

 only 32 /^ diam. Further study may prove it to be a new species. 



117. C. Portianwn, Archer, p. 77, Pk XIV. — Swamp back 



of coUeije woods. Aug, 



■With 



118. C, ornatiini, Ralfs, p. 82, Pis. XVIII and XLIX. 



the above. Also from Moosehead Leike. Dr. Young. Diame- 

 ter 32 /x. 



119. C. subcrcnatupi, Hantzsch., p. 84, Pk XVIII.— Swamp 



back of college woods. July. 



120. a biretiim, Breb., p. 86, PI. XVIL— Pool by road to- 

 ward Pushaw Pond. June. Small form, only 37 ;i diam, 



C. Broomii, Thwaites, p. 86, Pk XVII.—Recorded before (No. 

 40), but the forms observed this season were small, only 20X27 

 //, with the sinus more open and the neck longer than WoUe's ng- 

 Frog pond, Orono. July, 



121. C pseudopectinoides, Wolle, p. 89, Pk XIX.— Form of 

 this species but only 23 // diameter. Moosehead Lake. Dr. 



Young. J 



122. Xa 



Half 



cells nearly hemispherical, broadest at the ends. Ends truncate 

 and bearing the four pairs of spines. Sinus more open. Differs 

 from Deloonte's varietv of 



X, crista I Hin fig- 



cearum Subalpinarum " by being broadest at the ends and 



