62 Yorkshire Naturalists' Union : Annual Report, 1909. 



vegetation of disused quarries, which is an important contribution 

 to the study of " succession." We are glad to note that survey 

 methods have been employed in the study of the distribution 

 of Mollusca. The paper by Messrs. Kendall, Dean and Rankin 

 on " the Geographical Distribution of Mollusca in South Lonsdale," 

 is an interesting conti-ibution to the subject, and might, we think, 

 be applied with advantage in other branches of zoology 



The following were elected for 1910 : — 

 ^ Chairman — J. F. Robinson, Hull. 



Convener and Representative on Executive and on Committee 

 of Suggestions — T. W. Woodhead, Ph.D., Hudders- 

 field. 

 Other Members — S. Margerison, Calverley, Leeds; C. Waterfall, 

 Hull ; W. B. Crump, Halifax ; H. H. Corbett, Don- 

 caster ; J. Hartshorn, Leyburn ; J. W. H. Johnson, 

 Thornhiil ; W. E. L. Wattam, Huddersfield ; P. F. 

 Lee, Dewsbury ; F. Elgee, Middlesbrough ; H. J. 

 Wilkinson, York ; W. Jackson, Goole ; Wm. G. 

 Smith, Edinburgh ; and W. Robinson, Hull. 



Yorkshire Bryolcgical Committee. — Mr. C. A. Cheetham 

 reports : — One or more members of this Committee have attended 

 each of the LInion's meetings. 



Although additional species to the county list are few, the 

 general distribution is still being investigated, and many mosses 

 which have been apparently extremely rare, are being shown to 

 occur more frequenth'. 



Mr. T. C. Thrupp, of Doncaster, found Tortula cernua Lindb. 

 near Conisboro' ; previously its only known British station being 

 Aberford. 



Dicranodontiuni longirostre var. alpinum Schp., with its former 

 solitary Ingleboro' station, is now shown to be more frequent. 

 Mr. -A. Wilson found it at Greygarth, West. Lanes., close to our 

 borders. It is also abimdant in Buckden Woods, and on the 

 moors above ; in the extreme corner of the West Riding it grows 

 on the north slopes of Baugh Fell ; just across the boundary on 

 Wild Boar Fell there are sheets of it ; again at the head of the 

 Ure it is plentiful, this latter locality adding the moss to the North 

 Riding list. 



Mnium orthorrhynclium B. and S., is not so rare as stated in 

 our West Riding Flora. It is generally to be found in the Moun- 

 tain limestone gills. It grows in Bishopdale, and thus is an 

 addition to the North Riding hst. 



Another interesting addition to the Yorkshire hst is Barhula 

 gracilis Schwaeg. This was pointed out by Mr. W. E. Nicholson 

 from specimens misnamed B. Hornschuchiana Schlutz. It is 

 fairty common on the Magnesian Limestone at Knaresbro'. 



At the Cusworth Park (Doncaster) meeting, Phasciim Flcerkea- 

 mtm W. and M., was added to the West Yorks. list. At Market 



Naturalistj 



