BRITISH FRESH WATER ALCLE. 
123 
front view. Frond and projection uniformly verrucose. Both 
frond and projection fringed with colourless, equidistant, un- 
branched, subulate spines. 
Amongst moss in stream flowing out of Loughrigg Tarn and 
elsewhere. 
Staurastrum tuberculatum, Bennett Journ. Roy. Micr. Soc. 1886 , 
p. 12 , t. 2 ,/. 24 . 
Frond moderately large, 70 y long by 55 fi broad; each frus- 
tule nearly hexagonal in shape, 37 y broad at the apex, 30 p at 
the isthmus ; the terminal and upper lateral edges nearly straight 
or slightly convex, the lower lateral edges concave. The whole 
margin, except the lower lateral edges, rough with pearly granules, 
which are larger at the corners. Surface of frond tuberculated. 
Bog pool. Loughrigg. 
Staurastrum quadri-spinatum, Turner Naturalist 1886 , p. 35 , t. 1 ,/. 4 . 
Medium size, much longer than broad; frond smooth or lightly 
punctate ; each angle of the segments bearing four stout divergent 
spines; ends of segments slightly concave; sinus wide, expanding 
rapidly. 
Size. 34 p long, 26 p broad ; isthmus 8 p ; spines 10 p. 
Trelleck Common, Monmouth. 
BRITISH SPHH1ROPSIDEHC. 
Provisional List of Species hitherto found in the British 
Islands. 
By M. C. Cooke. 
( Concluded from p . 108 .) 
MELANCONIEiE, Berl. 
Without perithecia, nestling beneath the cuticle through 
which the sporules partly issue in erumpent black or coloured 
masses or tendrils, sporules various, hyaline or coloured. 
A. Hyalospor^i. Sporules hyaline. 
Gen. 1 . GLCEOSPORIUM, Besm. Sacc. Syll. hi., 699 . 
Pustules subcuticular, disciform or pulvinate, at length 
often erumpent. Conidia ovate-oblong, continuous, hyaline, 
often oozing out in tendrils or globules. 
A. On leaves of Dicotyledons. 
606 . Glceosporium aquilegi®, TJium. Sacc. Syll. 3660 . 
On Aquilegia. Kew. 
607 . Glceosporium ficariae, BerTc. Sacc. Syll. 3661 . 
On Ficaria. Forden. 
