(2) 



Order II. CONCHULINA. 

 Family 2. EUGLYPHINA. 



Test rigid, more or less ovoid ; circular, oval, or 

 trigonal in transverse section ; composed of chitinous 

 or silicious discs and scales, often arranged in geo- 

 metrical pattern ; aperture single, usually terminal, 

 but sometimes oblique ; plasma granular, grey or 

 colourless ; nucleus single ; contractile vesicles one or 

 more ; pseudopodia filose, of variable length, sharply 

 pointed, simple or branched but not anastomosing. 



The following genera belonging to this family have 

 not yet been recorded from the British Isles : 



Nadinella Penard, 1899, containing a single species 

 only, N. tenella, similar to a Campascus, but having the 

 aperture of the test terminal instead of oblique. 



Pareuglypha Penard, 1902, also containing a single 

 species, P. reticulata, which is similar in the form of 

 the test to Euglypha miicronata, but both the test and 

 its prolongation consist of small plates similar to those 

 forming the tests of the Gyplioderise. 



SYNOPSIS or THE BRITISH GENERA. 



Test hyaline, ovoid, composed of silicious imbricated 

 scales arranged in alternating longitudinal rows ; 

 glabrous or furnished with spines ; aperture terminal, 

 circular or oval, bordered by regularly-arranged 

 denticulated scales. 32. Euglypha. 



Test hyaline, ovoid, compressed, composed of im- 

 bricated silicious scales, glabrous or furnished with 

 spines, aperture lanceolate with undulate border. 



33. Placocista. 



Test brown or colourless, sub-circular or ovoid, 

 compressed, composed of imbricated oval scales, 

 glabrous ; aperture elongate-oval, bordered by an 

 irregularly-dentated membrane. 34. Assulina. 



