CYPHODERIA AMPULLA. 75 



Kilda (Brown), Outer Hebrides ! (West) ; Inverness- 

 shire (West, Brown); Elginshire, Aberdeenshire, Perth- 

 shire, and Argyllshire (Brown) ; Forth area (Ecans) ; 

 Kirkcudbrightshire and Wigtownshire (Brown}. 



IRELAND. Mayo and the islands off Clew Bay ; 

 Lough Corrib, Gal way (West) ; King's County 

 ( Wright) ; Wicklow ! (Hopk.) ; Kerry. 



The presence of pheosomes and small crystalline 

 bodies in the plasma of this and other species of the 



oooo 



FIG. 142. Portions of tests of Cyphoderia ampulla, x 2000. 

 a b 



ooo 

 oxoxo 



FIG. 143. Portions of tests of the same, x 2000. 



genus has already been noted. The test of C. ampulla 

 has either a simple hemispherical fundus or the apex 

 may be mamillated ; the two forms are frequently 

 found in association. The small discs of which the 

 test is composed range from 1'5 to 2'5 /x, (rarely 3 /A) 

 in diameter and from 1/5 to 2^, in thickness; they 

 are arranged in various ways which may be grouped 

 as follows : 



(1) The discs may be circular or oval touching one 

 another, the angular interstices being of a lighter or 

 darker colour ; the discs are arranged in either parallel 

 or alternating rows (figs. 140 a and 6, 141 c). 



(2) The discs have an hexagonal appearance and 



