KENDALL: THE MOLLUSCA OF OUNDLE. 25I 



pygmcRum^ * Pyramidida ri/pestris, P. rottaidata, Helicella virgata, 

 H. itala, Candidiila caperata, C. gigaxit, Theba ca/itiana, Hygroviia 

 hispida, H. striolata, Acanthinida aculeata, Vallonia costaia, V. 

 pulchella, V. excentn'ca, * Helicigona lapicida, H. arbustorum, Helix 

 aspersa, If. nemoralis, H. hortefisis, Ena obsaira, Cochlicopa lubrica., 

 Azeca menkeana, Coecilioides acicula, Pupilla iiiuscoru?n, Laiiria 

 cylindracea, Vertigo aiitivertigo, V. pygmcea, *Balea perversa, Marpessa 

 latninata, Pirostoma bidentata, Succinea putris, S. elegans, Carychimn 

 minimum, Ancylus fluviatilis, Velletia lacustris, Limncea auricularia, 

 L. pereger, L. palnstris, L. truncatula, L. stagnalis, Planorbis 

 corneus, P. albus, P. crista, P. timbilicatus, P. vortex, P. spirorbis, 

 P. contorttis, P. fontanus, Physa Jontinalis, Aplexa hypnorum, 

 Biihytiia tentaculata, B. leachii, Vivipara contecta, Valvata pisciualis, 

 V. cristata, JVeritina fluviatilis, Dreissensia polymorpha, Unio 

 pictorum, U. tumidus, Anodotita cygnea, Sphcerium cor?ieum, S. 

 lacustre, Pisidium avmicum, P. casertanum, P. uitidum, P. personatum, 

 P. milium, P. pulchellutn, P. subtrtmcatum, P. henslowanum, P. 

 supinum, P. Jiiberuicum, and P. obtusale. 



Valvata macrostoma in Cambridgeshire. — This species is not uncommon in 

 the drains which intersect the fields within the containing embankments of the 

 Great Ouse at Ely, where I collected the specimens exhibited, on March the 26th, 

 1921. ' The drains are choked with vegetation, Nasturtium officinale, Apiuin nodi- 

 Jioriim, Hottonia palustris, Alyosotis palustris, Alisma plantago, Elodea canadensis, 

 Carex paludosa, etc., and support a varied molluscan fauna. The species found in 

 association with V. macrostoma were Succinea pzitris, Li^nna a pereger, L. stagnalis, 

 L. palustris, Planorbis vortex,, P. contortus, P. marginatus, P. corneus, and var. 

 albinos, Segmeiitina nitida, Physa fontinalis, Valvata cristata, Viviparus contectus, 

 Bythinia tentacnlata, B. leacJiii, and Sphoeriutn corneiim. — Chas. Oldham {Read 

 before the Society, Sept. yth, 1921). 



Physa fontinalis new to Selkirkshire.— While cycling past St. Mary's 

 Loch, Selkirkshire, on the isl October, 1921, I descended to the edge of the Loch 

 on the West side. The point selected was, unfortunately, almost barren of 

 luulluscan life, this no douljt being due to the bare stony nature of the bed of the 

 Loch, so that after close upon an hour's search I found myself with only three 

 specimens of P. fontinalis, one of L. pereger, and one of A. /luvialilis. On 

 referring to the recently published Census I noted that P. fontinalis had not 

 previously been recorded from Selkirkshire. I have, therefore, pleasure in 



recording this addition to the list. — E. CrapI'ER {Read before the Society, Nov. 

 2nd, 1921. 



* Occurring in " artificial " liubitals i.e., due lo human agency, such as gardens and stone 

 walls. 



