36 EUGLTPHA. 



Perty ; Difflugia floridce, pilosa, moluccensis, amphora, rectangularis, 

 D. Roberti^ Mutter, D. seriata, striata, Assulina alveolata, amphora, etc., 

 SetigereUa acanthophora, setigera, Difflugia Shannoniana, Dijjflugia 

 subacuta, Ehr. 



Shell transparent, colorless, usually regularly ovoid, 

 often oblong ovoid, sometimes flask-shaped ; in transverse 

 section circular, rarely compressed ; fundus broad, obtusely 

 rounded, rarely sub-acute ; oral end narrowest, often more 

 or less tapering. Mouth circular, surrounded with 4 to 

 12 (?) angular, denticulate points. Plates of the shell 

 usually oval, ovate or cordate (?), arranged in alternating 

 longitudinal rows, overlapping at the contiguous borders 

 so as to produce hexagonal areas included in zones of 

 minute, elliptical areolae. Fundus with 4 to 6 spines, 

 usually straight and equidistant, divergent or convergent, 

 sometimes irregular in smaller, less well-developed 

 forms, spines are absent. Length, 30/* to 152/* ; breadth 

 18 ft to 88/z. 



Hob. Among algae, mosses, etc., in bogs and in moist 

 situations, and in ooze of ponds. 



ciliatO,. SYN. : Difflugia ciliata, pilosa, strigosa, 

 D. SetigereUa strigosa, Ehr. ; Euglypha compressa, Carter, Leidy, 

 Schulze ; E. strigosa, Leidy. 



Shell compressed ovoid, with the oral pole usually 

 more or less tapering and truncated by the transversely 

 oval mouth ; transverse section oval, with rounded, more 

 or less sub-acute poles. Fundus and lateral borders 

 mostly fringed with spines or bristles, variable in number 

 and robustness, sometimes absent, sometimes numerous. 

 Plates mostly elongated hexahedral, closely fitting at the 

 margins. Mouth bordered with from 6 to 14 or more (?) 



