428 GONIOTHECIUM. 



GENUS 95. GONIOTHECIUM EHR, 1844. 



c^-^y- ' w^ Valves similar, smooth or hyaline, 



Jr Cv^ if more or less irregularly elliptic, 



M Wh m without spines. Sutural face often 



f| '"'if 'M showing fine puncta ; frustules united 



y \ & in cnams ' inflated at the median 



T^^Np^LJf portion, then constricted, and lastly, 



suddenly attenuate at the apices. 



Fig. ijfi.Coniotkecii/m . . . 



Odontelia var. Danica. Bnghtwell and Castracane refer this 



genus to Chceioceros. The G. Odontelia Ehr. var. Danica Gruti., found in the 

 deposit of Mors (Jutland), is represented in fig. 148 in the margin. 



