SPIRULA. 243 



chambers are indicated by annular depressed lines, which 

 towards the apex so pinch the primary coil as to give the 

 appearance of strung beads or globules to the earlier-formed 

 portion. Surface beneath the microscope minutely and 

 closely pitted. Whorls cylindrical, tapering with tolerable 

 quickness : the last one nearly straight at its termination. 

 Aperture circular, of a silvery nacre, chambers very nume- 

 rous, divided from each other by a vaulted plate, but con- 

 nected throughout by a narrow tube, which runs along the 

 inner side of the gyration. Diameter almost an inch ; at 

 the mouth nearly three lines. 



" Two specimens of this interesting addition to our 

 native stock, were found on the strand between Kenmare 

 harbour and Ballyskellig's bay, in the county of Kerry, 

 Ireland, by our intelligent and much respected friend, Mr. 

 O'Kelly, of Dublin, in the summer of 1817, where, as he 

 observes, the waves of the Atlantic come unbroken from 

 the shores of America." (Turton Conch. Diet.) It "is 

 mentioned in the late Mr. Tcmpleton's MSS., as having 

 been obtained near Whitehouse, Belfast bay ; and at Port- 

 rush, near the Giant's Causeway, by Mrs. Clemnow. Mr. 

 R. Ball has procured it near Youghall,* as Mr, W. H. 

 Harvey once did on the coast of Clare." (Thompson). 

 Mr. Couch remarks, " that three specimens have come into 

 his possession," out of several which had been taken, as 

 he was informed, on the coast of Cornwall. 



* But only entangled among some Cirrhipedcs attached to the mast of a vessel 

 (Thompson, Report Invert. Ireland). 



