A HISTORY OF SURREY 



this county in a paper by the writers which appeared in the Journal of 

 the Royal Microscopical Society for 1897.' 



Hormiscia subtilis, De Toni, var. tenerrima, 

 Kirchn. Esher Common, Richmond Park 

 and Wimbledon Common 



subtilis, De Toni, var. variabilis, Kirchn. 



DevirsJumps(Frensham),Esher and Esher 

 West-end Commons 



Microthamnion Ktitzingianum, Nag. Esher 

 Common, Richmond Park and Puttenham 

 Common 



Gonatonema Boodlei, West and G. S. West. 

 A species new to science of a very in- 

 teresting and rare genus ; Mitcham 

 Common 



Spirogyra Spreeiana, Rabenh. Esher West-end 

 Common 



decimina, Kfitz. A distinct new variety ; 



Frensham Little Pond 



Penium subtile, West and G. S. West. A 

 species new to science ; abundant on 

 Thursley Common 



Closterium siliqua, West and G. S. West. 

 New to science ; Esher West-end Com- 

 mon 



Cosmarium Subcucumis, Schmidle. Esher 

 West-end and Wimbledon Commons 



ocellatum, B. Eichler and Gutw., var. in- 



crassatum, West and G. S. West. A 

 new variety ; Thursley Common 



bioculatum, Breb., var. hians, West and 



G. S. West. A new variety ; Putten- 

 ham and Thursley Commons 



aspherosporum, Nordst., var. strigosum, 



Nordst. Puttenham Common 



geometricum, West and G. S. West. 



Puttenham Common 



helcangulare, Nordst. Thursley Common 



Heimerlii, West and G. S. West. Thursley 



Common and Mill Pond east of Chapel 

 Wood 



sphagnicolum, West and G. S. West. A 



species new to science ; Thursley Common 



difficile, Lutkem. Thursley Common 



Sinostegos, Schaarschm., var. obtusius, 



Gutw. Puttenham Common 



Portianum, Arch., var. orthostichum, 



Schmidle. Puttenham Common 



Nathorstii, Boldt. Mill Pond east of Chapel 



Wood 



subbroomei, Schmidle. Mill Pond east of 



Chapel Wood 



Cosmarium Ungerianum, De Bary, var. sub- 

 triplicatum, West and G. S. West. 

 A new and very distinct variety of a 

 very rare species not previously known 

 from the British Isles ; Mill Pond east 

 of Chapel Wood 



ellipsoideum, Elfv., also its var. minus, 



Racib. Both on Thursley Common 



subarctoum, Racib. Esher West-end Common 



gonioides, West and G. S. West. Thurs- 



ley Common 



Staurastrum trachytithophorum, West and 

 G. S. West. A species new to science ; 

 Thursley Common 



tunguscanum, Boldt. Puttenham Common 



nodosum, West and G. S. West. A 



species new to science; Thursley Com- 

 mon 



Staurastrum rostellum, Roy et Bisset, var. erostel- 

 lum, West and G. S. West. A new and 

 very distinct variety ; Thursley Common 



tetracerum, Ralfs, var. validum, West 



and G. S. West. A new variety; in 

 Mill Pond east of Chapel Wood 



Heimerlianum, Lutkem., var. spinulosum, 



Lutkem. Thursley Common 



margaritaceum, Meneg., var. subcontortum, 



West and G. S. West. A new variety ; 



DeviFs Jumps (Frensham) 

 Arthrodesmus Incus, Hass., var. subquadratus, 



West and G. S. West. A new varietyi; 



Chobham Common 

 Sphaerozosma vertebratum, Ralfs, var. latius, 



West and G. S. West. A new variety ; 



Esher West-end Common 

 Hyalotheca neglecta, Racib. A rare species ; 



very abundant on Thursley Common 

 Chlamydomonas Kleinii, Schmidle. Barnes, 



Chobham, Esher and Wimbledon Commons 

 Dactylococcus dispar, West and G. S. West. 



A species new to science ; occurring on 



old wood at Dorking 

 Scenedesmus granulatus, West and G. S. West. 



A species new to science ; Richmond 



Park 

 Rhaphidium polymorphum, Fresen., var. 



mirabile. A very remarkable new 



variety ; Wimbledon Common 



polymorphum, Fresen., var. tumidum. A 



new variety ; Puttenham Common 



1 As the British Desmids and British Freshwater Algte by Mr. C. Cooke only contain a part of the 

 species now known for Britain, the writers have also used standard works such as Bornet and Flahault's 

 Revision des Nostocac^es Hetencystites, Gomont's Monographic des Osc'tHar'tites, as well as standard Swedish, 

 German, Italian and Polish works ; also published works of the writers themselves, as well as using the 

 original figures contained in such standard works as Ralfs British Desmidiea. 



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