336 vii. cladophorace^e (West). [Cludophora 
2. CLADOPHORA Kiitz. (1843). 
1. C. crispata (Roth) Kiitz. Phyc. Gener. 264 (1843); Cooke, 
Brit. Fresh w. Alg. 143, t. 55, fig. 3 ; W. et G. S. West in Journ. 
Bot. 1897, p. 36. 
A form with the filaments not more than 1 to 1| cm. high ; 
branching subdichotomous, subsecund towards the apex; cells 
6-12 times longer than broad. 
Luanda. — From the bottom of the well at Welwitsch's house in 
Loanda ; Jan. 185'J. No. 144. 
2. C. amplectens Welw. ex W. et G. S. West in Journ. Bot. 
1897, p. 36. 
Loanda. — Ad imam basin truncorum Rhizqphorarum tempore 
refiuxus oceani aeri expositarum ad littora Loandensia frequens ; 
Nov. 1803. No. 23. 
Tbis species belongs to the section (Egagropila, and has ratber a 
peculiar habit ; Welwitsch likens the appearance of a tuft to that of 
a child's head. 
3. Cladophorse sp. 
A minute fragment, insufficient for accurate determination ; 
filaments about 1*5 mm. in length, branched repeatedly and 
irregularly ; cells 1^ to 3 times as long as broad, mostly some- 
what inflated, terminal cells acutely conical. Crass, cell. 33 to 
56 ft. I.e. 
Pungo Andongo. — On Helices in Lagoa de Quibonda ; Sept. 1857. 
No. 200. 
VIII. PITHOPHORACE^. 
1. PITH0PH0RA Wittr. (1877). 
1. P. radians W. et G. S. West in Journ. Bot. 1897, p. 36. 
Luanda. — Copiose in aquariis aquae subdulcis iusulae Cassanga prope 
Morro da Cruz; April 1854. No. 197- '' Stirps vegetationis sua? 
luxuria et vitas fugacitate seque insignis." 
The nearest species to this is P. (Edogonia (Mont.) Wittr., from 
which it differs in its much greater thickness, in having no branches 
of a third order, in never having binate spores, and in the intercalary 
spores being much less inflated. 
IX. TEMNOGAMETACE.E 
W. et G. S. West in Journ. Bot. 1897, p. 37. 
1. TEMNOGAMETUM W. et G. S. West, I.e. 
1. T. heterosporum W. et G. S. West, I.e. 
Huili.a. — Forming dense intricate masses with Gonatonema trqpicum, 
Zygnema spontanmm, and Stigeocloniuml sp., Morro de Lopollo ; Feb. 
I860. No. 172. 
This is a remarkable plant more pai'ticularly on account of its 
special conjugating cells ; these are short, and cut off either singly 
or in pairs at intervals along the filaments. In the former case the 
conjugation is scalariform ; these special cells in two contiguous 
