48 Yorkshire Naturalists’ Union: Annual Report, 1914. 
Bishop Monkton ; River Wharfe in plankton between Otley and 
Pool. 
! Gallionella ferruginea Ehr.—Strensall Common. 
Chlamydothrix ochracea (Mig) Kiitz.—Of frequent occurrence 
in waters as an ochrey filamentous deposit. 
*Clonothrix fusca Roze.—Balne Beck, Wakefield. (C. gracillima 
W. & G. S. West, has already in the Alga-Flora of Yorks., p. 148). 
*Thiothrtx nivea (Vauch) Win.—Calder and Hebble ‘Canal at 
Horbury ; Cooper Bridge; River Aire at Leeds; Balne Beck, 
Wakefield. 
Beggiatoa alba (Vauch) Trev.—Frequent in polluted waters, 
also in sulphur waters, e.g., drinking trough near bridge at 
Knaresbrough. 
* Beggtatoa leptomitiformis (Menegh) Trev.—In borehole water 
Bradford ; Balne Beck. Wakefield. 
*Chromattum okenw (Ehr.) Perty.—A purple, sulphur bac- 
terium, Baildon; Cooper Bridge. Abundant in Grimston Park, 
Tadcaster. 
§ Hillhousia nurabilis G. S. West, and v. palustris G. S. West. 
—The type has only recently been described and is entirely new 
to science ; the variety was obtained from a pond near Thornhill 
and is the only record. 
Fusarium aurantiacum Sacc.—Warley, near Halifax. 
Sporotrichum lanatum Wallr.—Greetland, near Halifax, Nat., 
LO dps arae: 
*Mucor circinelloides Van Tiegh.—Frequently develops in 
subcultures of aquatic fungi. 
*Acremonium spicatum Bon.—Developed on culture plates. 
Nat., I9gI1, p. 166. 
Dematium pullulans de B.—Developed on culture plates. 
*Aspergillus fumigatus Fres.—Developed on culture plates. 
Aspergillus niger Van Tiegh.—Readily develops in cultures 
infected from dark patches in dates and figs. Nat.. 1909, p. 221. 
Aspergillus griseus Lk.—Identified by C. Crossland on culture 
plate. Naturalist, 1909, p. 221. 
*Sachsta suaveolens Lind.—On culture plates. 
~ Monilia variabilis Lind. 
Leptomitus lacteus Ag.—R. Don, at Ickles Bridge ; River Nidd 
at Knaresbrough. 
Thamndium elegans Lk.—On culture plates. 
Saprolegnia sp. ?—Attacked fish in Lake, Thornes House, 
Wakefield. 
Oospora lactis Sacc.—Very frequent, first noticed in River 
Aire at Apperley Bridge, March 1908. 
t Oscillatoria formosa Bory.—Balne Beck, Wakefield. 
Naturalist 
