PLATE CL. 



PATELLA OBLONGA. 



OBLONG FRESH WATER PATELLAy OR LIMPET. 

 GENERIC CHARACTER. 



Animal Limax, Shell univalve, sub-conic, and without spire. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell very entire, oblong, compressed, membranaceous : vertex 

 pointed and reflected obliquely, or to one side. 



Patella oblonga : testa ingerrima oblonga compressa membra- 

 nacea, vertice mucronato reflexo oblique. Light- 

 foot. Phil. Trans. V. 76. p. 167. 



This species was first described in the transactions of the Royal 

 Society of London, by the Rev. Mr. Lightfoot, chaplain to the late 

 Duchess of Portland. He says it was found adhering to the leaves 

 of the Iris Psendacorus, in waters near Beaconsfield in Buckingham- 

 shire, by Mr. Agneu, the Duchess of Portland's Gardener. It has 

 been since found on plants in the river Stour, by the Rev. Thomas 

 Rackett. 



