28o YORKSHIRE NATURALISTS AT MARKET WEIGHTON. 



itself. Hydrocharis morsiis-rajicE^ Typha latifolia^ T. angusfifolia, 

 Narthecmm ossifraguin, on boggy ground. Apera spica-venti seen 

 growing by the road-side near Sancton ; it is a species that hkes a 

 sandy soil, and is only recorded as occurring in eighteen of the 

 vice-counties ; Baker, in his ' North Yorkshire,' records it from the 

 vale of York at Catton, Alne, and Sutton-on-the-Forest, and it is also 

 reported by Teesdale from Bulmer near Castle Howard. The Ferns 

 seen included Lastrea Jilix-jnas, L. spinulosa^ and L. dilatafa, the 

 latter of which was by far the most abundant, and is the most 

 common fern in the woods on the chalk wolds. Athyrium jilix- 

 fcemina, Lomaria spicaiit^ Pteris aquilina, and Polypodium vulgare 

 were also seen. 



Two members, interested in Mosses, spent the time at their 

 disposal in Houghton Wood, as the most likely place in the district 

 for the growth of these plants. They were fortunate in finding one 

 moss i^Hypnum imponens Hedw.) which has only hitherto been 

 recorded for Riccall Common in the East Riding. In the wood the 

 trunks of the trees were very free from cortical mosses, no Orthotricha 

 were seen, and Cryphcsa, which has been found growing on trees in 

 the neighbourhood of Sledmere, was not met with. 



The following Mosses and Hepaticae were gathered, all but one 

 of them, however, of general distribution in moist shady woodlands : — 



Mosses. 



Sphagnum cymbifolium Ehrh. Eurhynchium prselongum Dill. 



Sphagnum acutifolium Ehrh. Rhyncostegium confertum Dicks. 



Dicranum scoparium L. Plagiothecium sylvaticum L. 



Dicranum bonjeani DeNot. Plagiothecium denticulatum L. 



Ceratodon purpureus L. Plagiothecium undulatum L. 



Webera nutans Schreb. Amblystegium serpens L. 



Mnium undulatum Hedw. Hypnum purum L. 



Leucodon sciuroides L, Hypnum schreberi Ehrh. 



Thuidium tamariscinum Hedw. Hypnum cupressiforme L. 



Eurhynchium striatum Schreb. Hypnum imponens Hedw. 



This last moss is very closely allied to H. cupressiforme^ differing in 

 the narrower cellular tissue of the leaves, etc. It was found growing 

 amongst heath adjoining Houghton Wood. It has been gathered on 

 Strensall Common by Wilson and other muscologists, and is men- 

 tioned in the ' Catalogue of British Mosses ' as occurring in only 

 three vice-counties. 



Hepatic^. 



Radula complanata (L.). Lophocolea heterophylla Schrad. 



Cephalozia divaricata Sm. Ptilidium ciliare Nees. 



Lophocolea bidentata (L. ). 



The Geological Section was numerously attended and also 

 represented by all its sectional officers, the report being given by 



Naturalist, 



