92 WEST: ADDITIONS TO THE ALGyE OF WEST YORKSHIRE. 



*Cosmarium ochthodes Nordst. Cullingworth, both in a pool at 

 the bog and in a large trough close to the village. Baildon ; 

 Penyghent ; G. S. West. Wigton Moor. 



*Cosmarium kjellmanni Wille. Rombald's Moor; W. and 

 G. S. West. 



*Cosmarium isthmochondrum Nordst. Cautley Spout ; near 

 Keighley. 

 Cosmarium moniliforme Ralfs. Leeming ; W. and G. S. West. 

 Calocylindrus connatus Kirch. Cullingworth. 

 Calocylindrus cucurbita DeBary. Thornton Moor; Rom- 

 bald's Moor; W. and G. S. West. Doncaster. 



^Calocylindrus thwaitesii (Ralfs). Cullingworth; Frizinghall. 

 Thornton Moor ; Adel Bog ; Rombald's Moor ; W. and 

 G. S. West. Baildon ; Penyghent ; G. S. West. 



^Calocylindrus attenuatus (Breb.). Amcliffe. 



^Calocylindrus debaryi (Archer). Adel Bog; W. and G. S. West. 



^Calocylindrus pseudarctoum Nordst. et Wittr. Rombald's 



Moor ; W. and G. S. West. This was abundant, together with 



Closterium subulatum (Kiitz.), in washings of Btdbochccte 



setigera Ag. and Potamogeton polygcmifolius Pour. It exactly 



corresponds with Cooke's figures as regards form, but not as to 



dimensions. Measurements:— 



Rombald's Moor Nordstedt's. Cooke's 



Examples. Figures. 



17 — 24 /x 17 — 21/x 29 — 32^/x — Length. 



13 — 17 \x 14 — 16/i 19 — 24 fi — Breadth. 



12J — 15^ 13? — 15^ 17 — 21 [x — ,, of isthmus. 



*Xanthidium antilopaeum Breb. Wigton Moor. 



Arthrodesmus incus Hass. Cullingworth Bog. 



*Var. convergens Archer. Cullingworth Bog. 



Arthrodesmus convergens Ehr. Wigton Moor. Every living 



specimen of this had a gelatinous investment most delicately 



striated. Penyghent ; G. S. West. 



Staurastrum dejectum Meyen. Cullingworth Bog. 



*Var. mucronatum Ralfs. Cullingworth Bog. 



*Var. apiculatum Breb. Ingleborough. Adel Bog; W. and 



G. S. West. 



Staurastrum dickiei Ralfs. Wigton Moor. 



^Staurastrum subcruciatum Cooke et Wills. Wigton Moor. 



This was very sparingly seen ; the form and size agreed exactly 



with the figure of Cooke, both in front and end view. 



