CYPETODEKIA AMPULLA. 



79 



might be expected, is a specialized form of the sphag- 

 num- and moss-inhabiting variety. 



Whatever may be the size of the test it is at once 

 identified by an examination of its structure. No 



FIG. 146. Portion of test of Cyphoderia ampulla var. major, and 

 section of same, x 4000. 



FIG. 147. Portions of test of Cyphoderia ampulla var. major, x 4000. 

 a, from Port Erin, Isle of Man ; b, another specimen from same 

 locality showing line of a fracture. 



other known species of Cyphoderia possesses the small 

 circular or oval " perforations " geometrically arranged 

 around the scales ; these " perforations " are in the 

 living animal filled up by a chitinous cement which is 

 dissolved out by cold sulphuric acid, the test itself 

 remaining unaffected. 



