19 (16) Conidia pyriform, apical cell often attenuate, to 



80 p long Alternaria maritima 



19 (16) Conidia variously shaped, apical cell not attenuate, under 50 pi long 



20 (79) Conidia globose to ellipsoidal, 19-32^ long; conidiophores ab- 

 sent or reduced to simple pedicels Stemphylium maritimum 



20 (/.9) Conidia clavate, pyriform; conidiophores distinct 21 



21 (20) Conidia fuscous or dark brown, cells more or less 



parallel arising from a single basal cell 



Dictyosporium pelagicum 



21 (20) Conidia dark brown to black, cells irregular; 1 to 3 light 



basal cells may occur Monodictys pelagica 



37 



