ROEBUCK MEMORIAL NUMBF.R. 



195 



ENGLAND. 



Trent. 



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Mersey. 



Humbep. 



Tyne. 



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53 54 55 56 57 



53 54 55 56 ... 

 53 54 55 56 57 



... 59 



58 59 

 58 59 



61 62 63 M 



61 62 63 64 

 61 62 63 64 



53 54 55 56 57 ! 58 59 60 | 61 62 63 64 65 

 53 54 ... 56 57 58 59 60 i 61 ... 63 64 ... 



53 54 60 



57 60 



53 54 55 56 57 60 



53 54 55 56 57 ."58 59 60 



53 54 55 56 57 

 53 54 55 56 57 



53 54 55 56 57 

 ... 54 55 56 ... 



53 54 ,55 56 57 

 53 54 55 56 57 

 53 54 .55 56 57 



53 54 55 56 57 

 53 ... 55 56 57 

 53 54 55 56 ... 

 53 54 . 



53 



54 55 



56 57 



53 



54 55 



56 



57 



53 



54 55 









54 55 





57 



53 



54 ... 



56 





53 



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57 



53 



... 





56 





o i-H m o 



I-H 00 t-H 



58 59 ... 

 .58 59 ... 



60 



58 59 60 

 58 59 60 



58 59 ... 

 58 59 60 

 58 59 60 

 58 ,59 ... 

 58 59 60 

 58 59 60 

 58 59 60 

 .58 ... 60 



60 



58 59 60 

 58 59 60 

 58 59 60 



58 



58 59 60 

 58 ... 60 

 58 59 60 

 58 59 ... 



... 62 ... 64 ... 



... 62 63 64 ... 



61 62 63 64 65 



... 62 63 64 ... 



... 62 63 64 ... 



61 62 63 64 ... 



... 62 



61 62 63 64 65 



61 62 63 64 65 



... 62 



63 64 ... 



61 62 



63 64 65 



61 62 



63 64 ... 



... 62 



63 64 ... 



61 62 



63 64 65 



... 62 



63 64 ... 



... 62 



63 64 ... 



... 62 



... 64 ... 





... 64 ... 



... 62 



63 ... ... 



61 62 



63 64 ... 



61 62 



63 64 ... 





... 64 ... 



61 62 



63 64 ... 



... 62 





61 62 



63 64 ... 





63 64 ... 



CO 1-H I— I T-H ^ 



66 67 

 66 67 



66 



68 



... 67 ... 



66 67 ... 

 66 67 68 



... 67 ... 

 66 67 68 

 66 67 68 



66 67 68 

 66 67 68 

 66 ... 68 



66 ... 68 



... 67 68 



66 67 68 



66 67 68 



... 67 68 



69 70 

 69 70 



69 

 69 



69 



69 70 

 70 

 70 



69 70 

 69 70 



69 70 

 69 70 



69 70 

 69 70 

 69 70 

 69 70 



69 70 



'.'.'. 70 

 69 70 

 69 70 



71 



Lakes. 





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Name of Specie.s. 



Record.? in italics require 

 confirmation. 



B. leachii 



Viviparida 

 Paludina contecta 

 I', vivipara 



Valvatidae 

 V'alvata piscinalis 

 V. macrostoma 

 V. cristata 



Assemaniidse 

 Assemania grayana 



Pomatiidse 

 Cyclostoma elegans 



Aciculidse 

 Acme lineata 



Neritidse 

 Neritina fliiviatilis 



Dreissenidse 

 Drcissena polymorpha 



Unionidae 

 Unio pictorum 

 U. tumidus 

 Marg. margaritifera 

 Anodonta cygnea 

 A. anatina 

 Pseudanodonta sp. 



Cyrenidae 

 Sphccrium rivicola 

 S. corneum 

 S. lacustre 

 S. pallidum 

 Pisidium amnicum 

 P. casertanum 

 P. henslowanum 

 P. hibernicum 

 P. liiljeborgi 

 P. milium 

 P. nitidum 

 P. obtusale 

 P. parvulum 

 P. personatum 

 P. pulchellum 

 P. subtrimcatum 

 P. supinum 

 P. tenuilineatum 



Total 'specits 163 



