NOTES BOTANY, MAMMALIA. 



173 



Washed up at high-water mark also were numerous freshwater 

 shells, which are carried down from the ditches which drain the 

 marshes, into the sea, and are then thrown up by the high tides 

 upon the sand. The following freshwater shells were found in this 

 situation : — 



Sphcerium corneum L. One small specimen seen. 



Bytlmiia tentaculata L. A few noticed. 



Valvata piscinalis Mull. Not very plentiful. 



Planorbis spirorbis Mull. Very plentiful. 



Planorbis vortex L. Abundant. 



Planorbis carinatus Mull. Fairly common. 



Planorbis complanatus L. Large numbers seen. 



Planorbis cor?ieus L. Six specimens seen. 



Planorbis con tortus L. A few seen. 



Physa fontinalis L. One specimen observed. 



Limncea peregra var. ovata Drap. One noticed. 



Of aquatic Beetles, Helophorus aquaticus L., Gyrinus natator L., 

 and Ilybius fuliginosns L. were observed, the Helophorus and Ilybius 

 being still alive. A case of Limnephilus flavicomis, a water-boat- 

 man (Notonecta glauca), and a Water Scorpion (Nepa dnerea) were 

 also found upon the sand. 



NOTE— BOTANY. 



Flora Of Strensall and District.— In addition to the plants enume- 

 rated by Mr. A. R. Waller, at pp. 133-145 of the Naturalist, permit me to record 

 the following (from personal observation) : — 



Thalictrum flavum L., Alchemilla vulgaris L., Poterium sanguisorba L. 

 Strensall Village and Common. 



Geraniiim pyrenaicum L. , Vicia bobartii Forst. Near Towthorpe. 



Potamogeion compresstis Sm. , Barbarea stricta Andrz. By the river Foss. 



Salix alba, S. caprcea L. , S. aurita L. 



Rubus idcezis L., R. affinis, R. rhamnifolhis, R. discolor (W. and N. ). 



Rosa mollis Sm., R. tomentosa Sm. and var. subglobosa, R. rubiginosa L., 

 R. arvensis Huds., and the following forms of Rosa canina, lutetiana, dumalis, 

 arvatica, tomentilla, subcristata, watsoni, blondtzana (Ripart) from Hazel Bush 

 and Malton Road. — H. J. Wilkinson, York, May 13th, 1886. 



NO TES— MAMMALIA. 



Noctule in Durham. — Supplementing the notice in April Naturalist, 

 I may mention that Mr. C. E. Morgan, of the Flatts, near Bishop Auckland, 

 shot a Noctule flying over the pond at the Flatts last summer. — T. H. Nelson, 

 Bishop Auckland, April 17th 1886. 



Otters in Durham. — Several were seen up the Bedburn, a tributary of 

 the Wear, in the spring and summer of 1884, and one was killed near Hamsterley 

 (this probably is the one noticed by Mr. Fawcett, in the Naturalist for April). I 

 have occasionally observed the footprints of Otters by the side of the Bedburn 

 during the past two or three years. — T. H. Nelson, Bishop Auckland, 17th 

 April, 1886. 



June 1886. 



