CYCLOSTOMA. 203 



flattisli externally, with most minute wrinkles obliquely 

 radiating from the almost imperceptible sutural line. 

 Length seven lines; breadth a third of an inch. 



The colour of the animal is dark brown, deepening 

 beneath. Its head is elongated, and bears subulate ten- 

 tacles, with obtuse clavate tops; the eyes are placed at 

 their thickened external bases ; the foot is oval and rounded 

 at both extremities : the mantle has a crenulated edge. 

 An elaborate account of its anatomy by the Rev. M. G. 

 Berkeley, is contained in the fourth volume of the 

 " Zoological Journal." 



This pretty shell is abundant in many of the southern 

 counties, especially in cretaceous districts, where it may 

 be collected plentifully at the roots of brushwood. It is 

 not found in Scotland, nor in the slaty districts of the west 

 of England. It is found in Devon. It occurs at Helmsley 

 and Thorpe (Hincks), and elsewhere in Yorkshire, and in 

 " one locality near the sea on a limestone promontory in 

 the Kendal district " (T. Gough). It is said to be found 

 near Sedbury in Worcestershire (G. Reece). 



It seems never to have been taken alive in Ireland in 

 localities where it could be regarded as strictly indigenous. 

 A specimen was found at Youghal by Mr. Wright, and 

 Mrs. W. J. Hancock met with as many as a hundred dead 

 shells washed on shore near Bundoran, on the west coast, 

 in one day (W. Thompson). 



This species is reported as Scotch, through a mistaken 

 reading of the description of Cyclostoma marmorea, a 

 shell described by Captain Brown in the " Edinburgh 

 Journal of Natural and Geographical Science " (vol. i. 

 p. 13, pi. 1, f. 10, 11), from a specimen said to be British, 

 in the cabinet of Mr. Gerard. The example alluded to 

 appeared to be a nearly smooth variety of C. degans. 



