154 ASHFORD : LIST OF CHRISTCHURCH MOLLUSCA. 



Sphaerium corneum. — In all suitable places. R. Stour 

 from Christchurch to Heme ; R. Avon, from Christchurch 

 to Sopley, and many ditches communicating; also at 

 [Ringwood, Holmsley, Brockenhurst]. Adults with fry, 

 2 — 3 mm. in early May. 



Pisidium amnicum. — River Stour at Tuckton, length 8 mm., 

 breadth 10-5 mm. ; Somerford Brook sparingly ; [Ring- 

 wood, Brockenhurst abundant and fine, Holmsley]. Adults 

 with eleven to fourteen fry each, i — 2 mm. broad, and 

 distinctly striated, on 13th May. 



P. fontinale. — River Avon at Christchurch, Winkton, and 

 [Ringwood] ; R. Stour at Christchurch. Two with um- 

 bonal projections {henslowana) at Tuckton (J. H. Ashford) 

 and a itw puIcheUa from both rivers at Christchurch. 



P. pusillum. — River Stour, Christchurch, Wick, Tuckton; 

 Somerford Brook ; a smaller, rather more glossy and in- 

 equilateral form abundant in 18S2 in the chalybeate 

 streamlet, running down Boscombe Chine, since covered 

 in ; R. Avon and ditches, Christchurch and Winkton ; 

 [Ringwood, Brockenhurst]. 



P. nitidum. — Three specimens from R. Stour, Christchurch, 

 and R. Avon, Winkton, identified by Mr. J. W. Taylor. 



Anodonta cygnea. — River Stour at Tuckton Bridge, generally 

 undersized, occasionally attaining 5 inches. [Beaulieu, 6 

 inches]. 



Neritina fluviatilis. — River Stour, Christchurch to Tuckton. 

 Very abundant above Tuckton Bridge, Sept. 1884, in great 

 variety of markings ; about 4 per cent, being pure yellow 

 without spots {cerina), 14 per cent, presenting a most in- 

 structive graduated series connecting the latter with the 

 type, a few marked with three bands {trifasciafa), and two 

 with transverse bands {undulaia) ; R. Avon at Winkton 

 and [Ringwood]. 



Bythinia tentaculata.— Widely distributed. R. Stour from 

 Christchurch to Heme Court ; R. Avon up to Sopley, also 



J.C, v., Jan,. 1S87. 



