164 Addvess to the Lincolnshive Naturalists’ Union. 
PILULARIA GLOBULIFERA L. 
1g10, Roebuck. + 2. 
which is a new record for the whole county of Lincoln. 
Some Mosses and Chare were also collected on the margin 
of the pond and submitted to Mr. William Ingham, who named 
them as follows :— 
SPHAGNUM CYMBIFOLIUM (Warn.) var. GLAUCESCENS (Warn.) 
SPHAGNUM SUBNITENS Run & Warn. var. VIRESCENS Warn. 
HYPNUM GIGANTEUM Schp. 
HYPNUM ADUNCUM (Hedw.) var. INTERMEDIA Schr. 
Mr. Ingham added that there were a Nutella and a Chara, 
stating that the latter is probably C. vulgaris, and the former 
probably N. flexilis, but they cannot be named definitely in the 
absence of fruiting examples. 
It was on the Myriophyllum spicatum that Mr. Peacock found 
small examples of the Limnea. 
Although one of the associates was found with the Limnaa 
there was no trace of the other, the Aplexa hypnorum. But our 
investigations were made in August and September, and the 
Aplexa is an early spring species. It is abundant enough in the 
county, and I found it myself plentifully in ditches in April so 
near as the Isle of Axholme. 
As for the physiographical characteristics of the place where 
we found the Limneaa, Mr. Cobban, who is pre-eminently 
qualified from his intimate local knowledge and his geological 
acquirements, tells me that the pond is situate on the sandy 
commons north of Scunthorpe, amongst the blown sands, the 
home of the pigmy flints—at an elevation of 145 feet O.D. Here, 
masked by bracken and herbage, which again is surrounded by 
the wild arid sandy waste, it nestles a veritable haunt of nature, 
quite untouched by the hands of the husbandman and the busy 
workers of the iron and steel works so close at hand. The pool 
is a drinking place for many birds, some rare, all interesting, and 
in winter the haunt of wild fowl. The pool is situated on the 
lower portions of the Marlstone Rock beds where they join with 
the Middle Lias clays, which underlying clays hold up in a 
natural depression the water exuding from the marlstones. 
