SPECIES OF risiDimr. 37 



DISTRIBUTION. 



81 

 01 



NS CA 

 HB SS 



RW RE EL BF AN 



Wl El PN AS 



M AM PM FF Kl 



DN 86 PC KF 



1 CT B RF LL ED HD 



AY LA PE BW NN 



WD EO LD AN WT KB DF SK RX SN 



TY AR 00 CU WL HY DM 



WM 1L LE MO ML MY EY 



EM RO CV LH SL WY 8Y L M 



WG NG LF WH ME C J DB FT CH DY NM LS 



SG KG L D OU MN MG SP ST LR CB WN EN 



1 NT QC CW Wl CD RA HF WO ww NO HU WS ES 



NK LK 8T KK WX PB C M BR GE ox JLK M HT HE 



SK MC EC WA GM MM GW NW a* m fci 



WC L NS SJ NH sji^WK E K 



NO SS DT SH IX EX 



EC SD IW 

 SC WC 



C! 



Pisidium cctsertanum. 



(Recent occurrences are shown in red: fossil occurrences by a line 

 below the symbols. For the explanation of the symbols see p. 20.) 



RECENT. 



ENGLAND. 



LONDON. 1C. 



Barnes Common [B. B. W.] ; Blackheath [B.M. 98.5.20: 



22517-35 pars] ; East Finchley [J. E. C.]; Hendon [J. E. C.] ; 



North End [B. B. W.]. 

 BERKSHIRE. BK. 



Cothill [H. C. N.] ; Wendover Canal [C. 0.]. 

 BUCKING H AMSHIRE. BX. 



Denham [J, E. C.] ; Weston Turville [J. E. C.]. 



