CLOSTERIUM.
167
S c h l e s . 1878, p . 1 3 7 ; W o l l e , D e s m . U . S . 188-1-, p . 3 9 , t. G, f. 4 , 5 ; C o o k e ,
B r i t . D e s m . 1886, p . 2 2 , t. 13, f. 8 ; H a n s g . P r o d r . A l g e n f l . B & h m . 1888,
p . 178 ; D o T o u i , S y l l . A l g . 1889, p . 8 1 8 K o y & B i s s . S c o t t . D e s m . 189-1,
p . 2 1 1 ; N o r d s t . I n d e x D e s m . 1896, p . 1 3 2 ; W e s t & G . S. W e s t , N e w
. a n d I n t . E r e s h w . A l g . 1 8 9 0 , p . 1 5 1 , t. 4 , 1'. 4 7 ; A l g . S. E n g l a n d , 1897,
p . 5-1; A l g a - f l . Y o r k s . 1900, p . 5-1; A l g . N . I r e l a n d , 1902, p . 2 5 ; F r e s h w .
A l g . C e y l o n , 1 9 0 2 , p . 138.
CI. junddum
B a l i ' s , f o r m a gracillima-lxvissima
Babenh. Blor. Europ.
A l g a r . I l l , 18G8, p . 127.
CI. gracile f o r m a tenuissima H e i m e r l , D e s m . A l p . 1 8 9 1 , p . 5 9 1 .
Arthrodia gracilis K u n t z e , B e v i s . g e n . p l a n t . 1 8 9 1 , p . 8 8 3 .
Closlerium Umneticum L e m m . B h y t o p l a n k t o n siiehsis. T e i c l i e , 1899, p . 2 8 ,
t. 2 , f. 3 9 - 1 1 ; vide W e s t & G-. S. W e s t , N o t e s A l g . I I , 1900, p . 2 9 0 .
;
Cells small, slender and linear, 28-40 times longer
than their diameter, almost straight for more than half
their length, margins parallel, gradually narrowed and
gracefully curved towards the apices, which are obtuse;
cell-wall smooth and colourless; choroplasts sometimes
subundulate, with 5 to 7 pyrenoids; terminal vacuoles
with one to several moving granules.
Zygospore globose, angular-globose, or subquadrate
with rounded angles, smooth.
Length 130-190
breadth 3"-l-Gyx; breadth of
apices 1*2-2*4/A; diam. zygosp. 20-25*7 ^x.
ENGLAND.—Cumberland ! Westmoreland ! W . , N.,
a n d E . Y o r k s ! Lancashire! Cheshire (Hon).
Essex!
Cambridge! Oxford (zygosp. from near Goring) !
Middlesex!
Surrey!
Hants, (zygosp. from New
Forest)! Devon! Cornwall! (Marquancl); zygosp.
from Penzance (Joshua).
WALES.—Fairly general!
SCOTLAND.—Ross!, Sutherland!, Inverness!, Nairn,
Aberdeen (with zygosp.), Kincardine, Forfar ! , Perth ! ,
Argyll (Boy Sf Bissett).
General in Outer Hebrides !
Orkneys! Shetlands !
IRELAND.—Donegal!
Mayo !
Galway !
Kerry !
Dublin and Wicklow (Archer). Antrim! D o w n !
Geogr. Distribution.—France.
Germany.
Austria
and Galicia. Hungary. Portugal. Norway. Sweden.
Denmark.
N., Central, and S. Kussia.
Finland.
Faeroes. Iceland. Siberia. Greenland. Ceylon. Siam.
Sumatra.
New Zealand.
Australia.
E. Africa.
United States. Brazil. Paraguay.
Patagonia,.