FITZGERALD : SHELLS OF HARROGATE AND DISTRICT. 2 1 



often brought to Starbeck adhering to timber that has been 



used at docks etc. Mr. Blakey gave me some in 1886, but 



my attempts to introduce it have not as yet proved 



successful. 

 Bythinia tentaculata (L.). — Local. Plentiful in Staveley 



ponds ; and in pond at Copgrove Park, where, like all the 



moUusca in this pond, it grows to a large size ; occurs in 



sub-fossil state on the banks of the river Tutt. 

 Piano rb is nitidus (Miiller.) — I obtained three specimens 



from Staveley Ponds during last August. Asp Ponds, 



Knaresborough, (W.N.). 

 P. albus Miiller. — Abundant in suitable localities throughout 



the district. Pond, Ribston Park ; Lake, Ripley Park ; 



Starbeck Reservoir ; Staveley Pond ; Fullwith Stream ; 



wayside Pond, Nidd Bridge. This species grows to a very 



large size in the Crimple Stream.* 

 P. spirorbis Miiller. — Local but abundant where it occurs. 



Pond between Nidd Bridge and Knaresborough ; Pond 



near Knaresborough ; Ditch near Roecliffe ; Ditch near 



Ferrensby (W.N.). 

 P. vortex (L.). — Very local. Occurring in a ditch near Weeton 



(Y.N.U. Trans, part 9). 



* During the latter end of August 1887, I sent some of these to Mr. Wm. 

 Nelson, the Curator of the Conchological Society. At a meeting of the 

 Leeds Naturalist's Club and Scientific Association, held on August 29th, Mr. 

 Wm. Nelson the chairman directed the attention of the members to some 

 extra large specimens of P. alhts, and referred to Dr. J. Gwyn Jeffreys' 

 " British Conchology," in which (Vol. I, p. 84) the author mentions some 

 specimens received from his friend the Rev. A. Merle Norman, as being the 

 finest examples of the species he had seen, and which measured over y^ of an 

 inch across. The locality is stated, but erroneously, to be Kibworth, Durham ; 

 it should be Kibworth, Leicestershire. The specimens exhibited by the chair- 

 man were collected by Mr. F. R. Fitzgerald near Harrogate, and were full 

 larger than those mentioned by Dr. Jeffreys' being 9 mill, across. Other 

 equally large examples of /^. albus (var. draparnaldi) were shown from Sandal 

 near Wakefield, and compared with specimens of the typical form and normal 

 size, from Mollin Lake near Ilarewood, vide Leeds Mercury. These 

 shells were also exhibited at a meeting of this society by Mr. Wm. Nelson 

 (F.R.F.). 



