155 



6, 7, 8. Various stages in the variations from scales to leaves in the same, x Yz 

 9- Scales and leaves removed, showing an aborted flower of the season. 



10. The spadix taken from the same. 



11. The spadix of a normal flower, x 



12. A spadixj the regular spathe broken away, revealing an abnormal second 

 spatheat the base of the spadix. 



I3» The arrangement of two successive terminal stems of the plant, with their 

 leaf appendages. The leaves are successively numbered, No. III. in each case sig- 

 nifying the spathe, the position of the second spathe being indicated in the first stem. 



I4> 15* Two methods of representing the arrangement of the plant as it might 

 be expected to exist if the normal one third arrangement were adopted. In Fig. 15 

 No. II. should be on the second line, not the first. 



16. The position of the ^' flowers" and leaf buds, irrespective of leaves or scales : 

 ^j e, f represent membranous aborted spathes ; b, c, d represent the bases of the 

 stalk supporting the flowers which arrive at perfection. The remaining flowers are 

 also aborted, although it is barely possible that / or m are far enough along in the 

 series to develop into mature flowers next season. 



17* The same uncoiled and more graphically represented, 



18. A vertical section of one of the true flowers while still in the bud, x 2. 



The Fresh-water Algse of Maine.— L 



By F. L. Harvey. 



r -■ 



The species of Maine Algae enumerated below were observed 

 during the fall of 1887. 



The gatherings were taken from sheltered coves and pot-holes 

 along the Penobscot in the vicinity of Orono ; also from the clear 

 running water of spring brooks, and from Chemo Pond and stream 

 five miles east of Orono. Quite a number of species were ob- 

 served in the stagnant water of an old well on the college farm. 



As no observations have before been published upon the 

 fresh-water algae of Maine, it is thought best to include, with the 

 novelties, all the species observed, for the purpose of showing 

 geographical distribution. 



Descriptions are given of the new forms and those not ob- 

 served before in the United States. 



Some of the forms should be figured, but there are not 

 enough to make a full plate, so it is thought best to defer the il- 

 lustrations until more observations are made, and include them 

 With others in another contribution. 



The references to plates and figures are to Wolle's Desmids 

 and Fresh-water Algse of the United States, The systematic 

 arrangement of the species is that given in the same works. 



The writer is greatly obliged to Mr. WoUe for professional 



