210 Yorkshire Naturalists at Roche Abbey. 
of the Abbey ruins, by some for the first time, proved an object 
lesson, testifying to the value of the local Permian limestone as 
a building material. 
After lunch the geologists visited the well-known quarry 
just above the Abbey, and then the Maltby Main Colliery for 
the examination of spoil heaps. At the quarry referred to 
specimens of chalk-like dolomite rock were secured and its 
regular bedding was noted, as was also the effects of exposure 
on the surface of the stone, which soon wears a sombre grey 
aspect. Dendritic spots, probably of manganese dioxide, 
were observed to be prevalent in some parts, and along certain 
planes solution of the double carbonate had probably taken 
place, with subsequent deposition and crystallization. Leaving 
the Abbey quarry, a tramp of rather more than two miles 
brought the party to the coal pit in the seclusion of Maltby 
Wood. Here the Permian strata have been pierced, and the 
Barnsley seam of the Middle Coal Measures successfully 
reached at a depth of 820 yards. It was the shale over this 
coal seam brought to the-surface, and deposited on the spoil 
heaps, which proved an attraction to the geologists, and the 
remainder of the day was spent in its examination, permission 
having been granted by the Manager, Mr. T. L. Soar. 
The following were among the specimens collected :— 
Lepidodendron sp. Sigillaria tessellata Brongt, S. scutellata 
Brongt, Stigmaria, Calamites sp., Annularia sphenophylloides, 
Zenker, sp. Sphenophyllum cuneifolium, Sternb. sp. Sph. 
majus, Bronn, and leaflets of Neuropteris gigantea (?) Sternb. 
Septarian nodules of clay-ironstone were also seen among the 
pit debris. 
Micro-ZooLocy and Botany.—Mr. H. Moore writes :— 
The search of Mr. G. Howard and myself in various ponds 
did not yield much, and inasmuch as no Myriophyllum was met 
with there are no tube-building Rotifers to record. 
The following species were noted, viz :— 
ROTIFERA, | INFUSORIA. 
Notholca acuminata. Stentor polymorphus. 
Notholca scapha. Euglena viridis. 
Synchaeta pectinata. Svnura uvella. 
Actinophrys sol. 
——$_—— Aycella vulgaris. 
Hydra fusca. 
Also a few specimens of Volvox globator from Maltby 
Common pond. 
W.. Bak. We 
-O: 
Mr. W. Denison Roebuck describes ‘ Limaw cinereo-nigey var. strobelt 
Lessona, new to Britain,’ in The Journal of Conchology, for April 1st. 
The specimen was taken at Berkhamsted, Herts. In the same issue Mr. 
FF. J. Musham has a paper on the land and freshwater mollusca of Iona. 
Naturalist, = 
