W. WEST AND G. S. WEST : ALGA-FLORA OF YORKSHIRE. 95 



432. Cosmarium parvulum Br^b. [Syn. C. obcuneatum 

 West 1892, and C. ohciineahivt forma West 1892.] 



N.E. — Pilmoor, near Thirsk. Carlton Bank. 



Var. pumilum West & G. S. ^^'est. [Syn. C. ietragomim 

 vzv. pumilum'West 1894; C. parvuhimyax.nndulatum 

 Schmidle 1895; cfr. Journ. Bot., Sept. 1898.] 

 Mid W. — Near Ilkley. 



433. Cosmarium tuberculatum Arch. 



[Syn. Calocylindrus tuberculatus {Kxch.) Cooke]. 

 N.W. Mickle Fell : extremely rare. 



434. Cosmarium attenuatum Bre'b. 



[Syn. Calocylindrus attenuatus (Breb). Racib.]. 

 Mid W.— Arncliffe. 



N.W. —Mickle Fell. Cowgill Wold Moss, Widdale Fell. 

 Genus COSMOCLADIUM Breb. 1856. 



435. Cosmocladium constrictum Arch. 1875. 

 N.E. — Pilmoor, near Thirsk (vi. 1898). 



Genus SPONDYLOSIUM Breb. 1844. 



436. Spondylosium pulchellum Arch. 

 Mid W.— Adel (W. B. Turner). 



N.E.— Strensall (W. B. Turner). 



S.E. — Riccall and Skipwith Commons. 



Var. pyramidatum West. 

 S.E. — Riccall Common. 



437. Spondylosium secedens (DeBary) Arch. 



[Syn. Sphcerozosma secedens DeBary]. 

 Mid W. — Bog two miles south of Clapham (vi. 98). 



438. Spondylosium pygmaeum (Cooke) West 1892. 



[Syn. Sphcerozosma pygmceum Cooke 1886]. 

 This is not Sphcerozosma pygmceum Rabenh. 1868 = Costna- 

 riiiiii pygniaum Axch. 1864. 

 N.W.— Mickle Fell. 

 S.E. — Riccall Common. 



439. Spondylosium papillosum West & G. S. West 



1895. [Syn. Spondylosium dcpressnm Kirchner, Mikr. 

 Pflanz. d Siissw., Theil I, 1891, p. 21, t. ii., f. 61]. 



