172 THE FRESH-WATER ALG.i: OF ESSEX. 



Hyalotheca dissiliens, Sm. Cooke, t. 3, f. i. In ponds, 

 High Beach (A.H.H.); Snaresbrook. 



H. mucosa, Mert. Cooke, Desm., t. 3, f. 2. In pools, High 

 Beach (A.H.H.) ; Peering (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. i. In 

 pools, Snaresbrook. 



D nodulosum, Breb. Cooke, Desm., t. 6, f. 3. In pools, 

 Loughton (Q.M.C.). 



D. baculum, Pireb. 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.A^). 



C. acerosum, Ehr. Cooke, Desm., t. 9, f. i. In ponds, 

 Kelvedon (E.G. A\) ; 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. A'.). 



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. i. 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 ((J.M.C). 



C. linea, Perty. Cooke, Desm., t. 15, f. 2. In pools, Snares- 

 brook. 



