14 



point rarely inflated above and abruptly pointed. Fruit at the divi- 

 visions of the leaves, oogonia single or aggregated ; terminal cells of the 

 coronula elongated; coronula evanescent; oospore 

 440 to 480 long, 360 to 375 broad with 6 or 7 angles 

 which are not prominent, the surface perfectly smooth 

 (even under the highest lenses). Antheridium 530- 

 580 in diameter. The first division of the leaves 

 is about 400 in diam. ; the dilated terminals are from 

 800 to 900 in diam. at the widest part. 



This unique species, of which but few specimens 

 exist, was sent by Prof. Macoun, of Canada, as having 

 been collected by Mr. John Moser, at Canaan Forks, 

 New Brunswick. Mr. Moser, however, when applied 

 to had no recollection of having collected it, and has not been able to 

 re-discover the plant, after careful search in that vicinity. It is possi- 

 ble that the locality may be wrong, since its appearance associates it 

 with N. clavata, A. Br., and the explorations of the route of the Cana- 

 dian Pacific may have brought the plant to light. 



It is, however, quite distinct from N. clavata, A. Br., not only by 

 apparently, but not truly belonging to the helrophyllce, but by the pecu- 

 liarity of the coronula of the sporophydium and the peculiarities of the 

 mature spore, which is larger and has a perfectly smooth surface (never 

 seen in N. clavata, A. Br.). 



NITELLA MACOUNII, Allen ; Tolypella Macounii, Allen. Bull. 

 Torrey Bot. Club, XIV., p. 212, plates 72 and 73, Nitella Macounii, 

 Allen, idem XV., p. n. 



Plant small, 2 to 4 inches long, densely tufted and much branched. 

 Stem about 250 in diam., bearing verticils consisting of about eight 

 leaves. Leaves all divided, but dissimilar, part bear fertile nodes and 

 are twice divided, the terminals being one-celled, a few do not bear 

 nodes and consist of a long two-celled terminal. This same dissimi- 

 larity pertains at the first node of the leaf, which bears leaflets with a 

 secondary node, and then a simple two-celled terminal. These two- 

 celled terminals, whether springing from a stem-node or a leaf-node, 

 are usually as long as or even longer than the other terminals. The 

 first segment of the leaf is 190 to 200 in diam. ; the second, about 140 

 to 150 in diam. ; the terminals 120 in diam. ; and terminate abruptly 

 in a sharp point. The last node of the leaf bears generally 3 to 4 

 terminals with an antheridium and two or three oogonia. The fertile 

 leaves are usually but once or twice divided, while the sterile leaves are 

 usually 2 to 3 times divided. Some ultimate nodes, especially the sterile 

 leaves, bear four long terminals, all of which are two-celled, but the 



