THE FRESH-WATER ALGAE OF ESSEX.
175
S. orthospira, Nag. Cooke, t. 33, f. 2. In pools, Troyes
Wood, near Witham (E.G.V.).
S. orbicularis, Hass. Cooke, t. 34, f. t. In ponds, Kelvedon ;
Maldon (E.G.V.).
S. bellis, Hass. Cooke, t. 34, f. a. In ponds, Kelvedon;
Braxted (E.G.V.). Var. neglectum, Hass. In ponds, Feering (E.G.V.).
S porticalis, Vauch. Cooke, t. 35. Var. quinina, Hass. In
ponds, Kelvedon (E.G.V.) ; Epping. Var. decimina, Hass. In
ponds, Rivenhall (E.G.V.) ; Epping.
S. condensata, Vauch. Cooke, t. 36, f. 1, In pools, Kel-
vedon (E.G.V.).
S. longata, Vauch. Cooke, t. 36, f. 2. Var. communis, Hass.
In ditches, High Beach (A.H.H.) ; Kelvedon ; Easthorpe (E.G.V.) ;
Walthamstow ; Snaresbrook. Var. turpis, Kutz. In ditches, Kel-
vedon (E.G.V.) ; High Beach.
S. flavescens, Hass. Cooke, t. 37, f. 1. In pools, High
Beach (A.H.H.); Massing Heath (E.G.V.). Var. gracilis, Hass.
In pools, Wanstead Flats (A.H.H.); Kelvedon (E.G.V.).
S. insignis, Hass. Cooke, t. 38, f. 1. In streams, Kelvedon
(E.G.V.).
S. quadrata, Hass. Cooke, t. 39, f. 1. In pools, Kelvedon
(E.G.V.).
S. weberi, Kutz. Cooke, t. 39, f. 2. Var. inaequalis, Hass.
In pools, High Beach (A.H.H.) ; Walthamstow.
S. tenuissima, Hass. Cooke, t. 39, f. 3. In pools, High
Beach ; Walthamstow ; Kelvedon (E.G.V.).
Zygogonium ericetorum, D. By. Cooke, t. 42, f. 2. On
heaths, Tiptree Heath (E.G.V.).
Mesocarpus parvulus, Hass. Cooke, t. 42, f. 3. In ponds,
Epping (A.H.E); Kelvedon (E.G.V.).
M. scalaris, Hass. Cooke, t. 42, f. 1. In ditches, Abridge;
Kelvedon (E.G.V.).
M. pleurocarpus, D. By. Cooke, t. 43, f. 1. In pools,
Feering (E.G.V.) ; Walthamstow.
Staurospermum gracillimum, Hass. Cooke, t. 43, f. 3.
In bog pools, High Beach (A.H.H.); Snaresbrook.
S. capucinum, Kutz. Cooke, t. 44, f. 1. In ponds, High
Beach (A.H.H.); Snaresbrook.
S. viride, Kutz. Cooke, t. 44, f. 2. In ditches, etc., Royden
(A.H.H).