Potamogeton. | NAIADACEA. 309 
bays, in a small bay near the Muckross Hotel boat-house 
and in Glena Bay: R.W.S. 1890, and in 1907. 
From about 60 feet above sea-level at Killarney, to 507 
feet in Lough Acoose, Glencar (R.W.S.). 
First record in 1841 : Dr. Taylor, Supp. Eng. Bot. 
P. perfoliatus Linn. 
Districts — II. Ill. IV. V. VI. VII. VIII. IX. 
Native. Lakes and rivers. Rather common and locally 
abundant, but rare over wide areas. Peren. June—July. 
II. In the Waterville Lakes, 1904, locality extending 
into—ITT. In Caragh Lake and the Glencar River, both 
localities extending into—IV. In Lough Acoose, 1890-1913 ; 
abundant in the Lower Lake, Killarney, and the River 
Laune, 1909.—V. In Castlegregory Lake and in some of the 
lakes about Connor Hill, 1905.—VI. In many localities in 
the Killarney Lakes and in the River Laune, 1888-1912.— 
VII. Common about Killorglin, 1904.—VIII. In the River 
Brick near Sleveen and in the Cashen River, 1902, the latter 
station extending into—IX.: R.WS. 
From sea-level, to 770 feet in Lough Camclaun near 
Connor Hill (2.W.S.). 
First record in 1884: Hart, Proc. R.I.A. 
P. crispus Linn. 
Districts — — Il. — V. VI. VII VIII. IX. 
Native. Ditches, streams, lakes and ponds. Very rare in 
the south, local in the north. Peren. June—July. 
ITI. In a pond near Knightstown, Valencia {sland, 1906 
(Miss Delap) R.W.S. 1908.—V. On the north side of Castle- 
gregory Lake and in the stream from it : Hart 1884.—VI. In 
two or three spots about the River Maine between Farranfore 
and Castlemaine, 1899, localities extending into—VII. 
Sparingly in the River Laune just above Killorglin, 1911 ; 
in the River Lee near Tralee, 1906.—VIII. Frequent about 
Banna and Lixnaw, and in ditches, &c., at Ardfert, 1888- 
1907 ; in streams and ditches about Abbeydorney and near 
the Cashen River, &c., 1904.—IX. In the Cashen River, 
1902: R.W.S. 
First record in 1884: Hart, Proc. R.I.A. 
This species has not, so far, been noticed about the 
Killarney Lakes, and only sparingly in one locality near the 
tidal portion of the River Laune, a river in which nearly all 
the Kerry Pondweeds congregate. 
