&AEINE BOTANY. 87 



7. JfTopJctrkn, the Hopkirk. 



8. Itamulosa, small-branched. 



9. Percursa, running. 



XCIV. Viva. Name from the Celtic word ul, water. 



1. Latissima, wide ulva. " Green Stoke." 



2. Lactuca, lettuce. " Oyster Green." 



3. Zinza, the Linza. 



Family XXI.— Oscillatorle.* 



XCY. Rivularia. In allusion to the fresh-water habitats 

 of many of the species. 



1. Nitida, shining rivularia. 



2. Applanata, flat. 



3. Atra, black. 



4. Plicata, folded. 



XCYI. Schizothrix. Name derived from two Greek words, 

 signifying to divide and a thread. 



1. Cresswellii, the Cresswell schizothrix. 



XCYII. Calothrix. Signifying beautiful hair, the filaments 

 being very slender and delicate. 



1. Confervicola, conferva-like calothrix. 



2. Zitteola, yellowish. 



3. Scopuloram, clustered. 



4. Fasciculata, bundle-like. 



5. Pannosa, wrinkled. 



6. Hydnoides, swelling-formed. 



7. Ccespitula, turf-like. 



XCYIII. Microcoleus. Name from two Greek words, sig- 

 nifying a small branch. 



* The plants of the two remaining Families being generally 

 Microscopic, we haye not illustrated them. 



