1 7 6 



Notes on Mollasca 



Donax vittatus (DaCosta). Several detached valves thrown 

 up on the beach. 



Fam. MACTRIDiE. 



Mactra subtruncata (DaCosta). A few detached valves thrown 

 up on the beach. 



Mactra elliptic a (Brown). A few detached valves thrown up 

 on the beach. 



Mactra stultorum (L.). A few specimens thrown up on the 

 beach. 



Scrobicularia alba (Wood). Common in shell sand. 



Fam. SOLENID^E. 



Solen siliqua (L.). Common on the beach, but very seldom 

 perfect, owing - to the stones scattered about. 



Fam. MYID^E. 



My a truncata (L.). Common, thrown up on the beach. 



Fam. SAXICAViD^. 

 Saxicava rugosa (L.). Very common in the rocks. 

 Var. arctica. Common in the roots of Laminaria digitata. 



Fam. PHOLADID^E. 

 Pholas crispata (L.). Very common in the rocks. 



NOTES on MOLLUSCA. 



Mollusca an Louth District.— In February and March I found Helix 

 hortetisis (shells) in Haugham and Ruckland, H. arbustorum in Ruckland, 

 and H. virgata in Oxcombe, all new localities. — C. S. Carter, 8, Bridge 

 Street, Louth, 2nd April 1902. 



Limnsea peregra monst. deco /latum at Rossington, South-West 

 Yorkshire. — A small shallow pond at Rossington swarms with small 

 L. peregra. These are all decollated. The only other shells found in the 

 same pond were Planorbis albus. I enclose specimens of both. — H. H. 

 Corbett, Doncaster, 6th April 1902. 



Ancylus fluviatilus in Windermere Lake. — While staying- at Amble- 

 side last autumn I found this freshwater limpet abundant on stones at the 

 head of the lake. This is an unusual ' habitat ' for the species, and it 

 occurred to me that it must have been introduced info the lake by the 

 Rothav and Brathay rivers, and this I found to be the case ; for. though 

 I did not search in the river beds, I found the shells on stones in Rydal 

 Water, from which the Rothay flows into lake Windermere, and I traced 

 them in a stream flowing- down from Loughrigg- Fell into Rydal Water. All 

 t he specimens I saw in lake or brooklet were of small size and dark coloured. 

 — F. M. Burton, Highfield, Gainsborough, 14th April 1902. 



Naturalist 



