86 . YORKSHIRE NATURALISTS' UNION. 



381. Cosmarium nasutum Nordst. 

 Mid W. — Bog, two miles south of Clapham. 



N.^^^ — Cowglll Wold Moss, Widdale Fell (with zygospores). 



Zygospores globose, with rather few mamilliform protuber- 

 ances (about nine in the periphery); each protuberance furnished 

 with a short, thick, somewhat uncinate spine. Diameter: zygos- 

 pores without spines, 34 — ZSV\ ^^'i^h spines, 45 — 47 /a. 



This is another of the rare alpine species of the genus, and 

 its occurrence in Yorkshire is noteworthy. 



382. Cosmarium alatum Kirchn. 

 Mid W. — Boston Spa. 



N.E. — Pilmoor, near Thirsk. 



383. Cosmarium orbiculatum Ralfs. 

 S.W. — CuUingworth. 



N.W.— Mickle Fell. 



N.E.— Strensall (W. B. Turner). 



384. Cosmarium moniliforme (Turp.) Ralfs. 

 Mid W. — Ilkley (W. H. Dikes). Penyghent. 

 N.W.— Leeming. Mickle Fell. 



N.E. — Strensall. Pilmoor, near Thirsk. 

 S.E. — Riccall Common. 



Forma panduriformis Heimerl, 

 N.E. — ^Pilmoor, near Thirsk. 

 . S.E. — Riccall Common. 



385. Cosmarium subexcavatum Nob. [Syn. C. exca- 

 vattim Nordst. var. ellipticuin Wille, ofvers. af K. Vet.- 

 Akad. Forh. 1879, no. 5, p. 47, t. xiii., f. 46 ; C. 

 istk??nian West var. Willei West, Journ. Linn. Soc, 

 Bot., vol. xxix., 1892, p. 160; DyspJmictiuin Willei 

 Schmidle in Hedwigia, Bd. xxxiii., 1894, p. 94]. 



This plant differs so considerably from C. excavatiim Nordst. 

 that it must necessarily be considered as a distinct species. 

 Schmidle evidently arrived at the same conclusion but placed it 

 under the genus Dysphitictium. The specific name ' Willei ' 

 could not be utilized, as there is a C. Willei Lagerh, 



Trans. Y.N.U,, 1897 (pub. Dec. 1900). Bot. Series, Vol. 5. 



