172 THE FRESH-WATER ALGAE OF ESSEX.
Hyalotheca dissiliens, Sm. Cooke, t. 3, f. 1. In ponds,
High Beach (A.H.H.); Snaresbrook.
H. mucosa, Mert. Cooke, Desm., t. 3, f. 2. In pools, High
Beach (A.H.H.) ; Feering (E.G.V.).
Desmidium swartzii, Ag. Cooke, Desm., t. 5, f. 2. In
pools, High Beach (A.H.H.); Loughton (Q.M.C.).
Docidium ehrenbergii, Ralfs. Cooke, Desm., t. 6, f. 1. In
pools, Snaresbrook.
D. nodulosum, Breb. Cooke, Desm., t. 6, f. 3. In pools,
Loughton (Q.M.C.).
D. baculum, Breb. Cooke, Desm., t. 7, f. 4. In ponds,
Snaresbrook.
Closterium lunula, Ehr. Cooke, Desm., t. 8, f. 4. In ponds,
High Beach (A.H.H.); Kelvedon (E.G.V.).
C. acerosum, Ehr. Cooke, Desm., t. 9, f. 1. In ponds,
Kelvedon (E.G.V.) ; Epping ; Snaresbrook.
C. gracile, Breb. Cooke, Desm., t. 13, f. 8. In pools, High
Beach.
C. ehrenbergii, Men. Cooke, Desm., t. 12, f. 2. In ponds,
Chingford; Kelvedon (E.G.V.).
C. moniliferum, Ehr. Cooke, Desm., t. 12, f. 3. In ponds,
Kelvedon (E.G.V.).
C. jenneri, Ralfs. Cooke, Desm., t. 13, f. 4. In ponds,
Loughton (Q.M.C.); Snaresbrook.
C. leibleinii, Kutz. Cooke, Desm., t. 13, f. 1. In pools,
High Beach ; Walthamstow.
C. dianae, Ehr. Cooke, Desm., t. 13, f. 3. In pools, High
Beach ; Walthamstow.
C. striolatum, Ehr. Cooke, Desm., t. 11, f. 1. In pools,
Loughton.
C. intermedium, Ralfs. Cooke, Desm., t. 11, f. 2. In pools,
Snaresbrook.
C. lineatum, Ehr. Cooke, Desm., t. 12, f. 1. In pools,
Walthamstow.
C. rostratum, Ehr. Cooke, Desm., t. 14, f. 3. In ponds,
High Beach (A.H.H.): Kelvedon (E.G.V.).
C. setaceum, Ehr. Cooke, Desm., t. 14, f. 4. In ponds,
Chingford (Q.M.C.).
C. linea, Perty. Cooke, Desm., t. 15, f. 2. In pools, Snares-
brook.