ALG OF THE BIRKET QARUN, EGYPT 243 
spermum Hansg., Vaucheria sessilis (Vauch.) DC., Cylindrospermum 
indentatum nob., Anabena oscillarioides var. tenuis Lemm., an 
other Alge. I have seen but two laments of it, and the peculiar 
a maximum diameter of about 
53. Phormidiwm ambiguum Gon Attached to bottom of boat 
no. 422). 
54. P. Coriwm (Ag.) Gom. In drying-up salt-lagoon (nos. 438 
and 439). 
55. P. fragile (Menegh.) Gom. In swampy ponds (no. 389). 
(n 56. P. tenue (Menegh.) Gom. In ponds near mouth of Wady 
o. 393). 
57. Oscillatoria proboscidea Gom. a trich. 125-13». In 
algal scum on surface of stagnant eg (no. 4 
8. O. formosa Bory. In ponds near mouth of Wady 
(no. 389). 
59. O. animalis Ag. With tire nage: species (no. 389). 
o a (Kit 
60. O. ; 
Oscillar. 18938, p. 249. The sichbfiog were all subacute and 
uncinate, and the curious “inflated cells’ were very numerous. 
Crass. trich. 7-5-8 p. (Fig. 11.) Associated with 0. proboscidea 
no. 47 
61. a ci Ag. With the preceding species (no. 471). 
a. Forma trichomatibus subbrevibus multe 
contortis; cellulis diametro 13-2-plo ag elgg Crass. trich. 
2. In ponds near mouth of Wady (no. 393). 
This form occurred amongst the ei tots matrix of Cylindro- 
spermum indentatum, Nodularia spumagena, and Spirulina major, 
forming closely coiled filaments of no great length, which re- 
Spirulina major Kiitz. Crass. trich. 1-1-2 »; diam. spir. 
25 »; anfractibus 3-2 » inter se distantibus. In ponds near 
393 
0. . 
63. S. subtilissima Kiitz. Crass. trich. 0-7 »; diam. spir. 
28 »; anfractibus 1-7-1'8 # inter se distantibus. On stones in 
shallow water (nos. 426 and 430). In a pure str atum, thrown up 
on beach (no. 444) and floating in shallow water (no. 451). Also 
1 
xissima G. 8. Wes ear 1 nee 8s Exped.” 
Journ. Linn. Soc. Bot. Cam 1907, p. 178, t. 9, £.6. Forma 
trichomata in spiram regularem pi eed 5-8 B da anfracti- 
bus 15-17 » inter se distantibus. Crass. trich. 0:7 »; long. tot. 
trich. 19-45 p. (Figs. 2-4.) In drying-up salt-lagoon (nos. 438 
and si 
Egyptian form differs from the Tanganyika specimens in 
the “hgh greater width of the spirals, which are also very 
slightly closer together. 
65. Asterocystis smaragdina (Reinsch) Forti, Syll. Myxo phy- 
cearum, 1907, p.691. [Callonema smaragdinum ‘Reinsch, Contrib 
