288 J. M. Clarke—Devonian Spores. 
vertical bars. The rock shows as many empty spore cases as 
filled, and dehiscence seerns to have taken place, along a line 
which would compare to the “hinge” of a Beyrichia. The 
sporocarps (in section) contain usually two macrospores, some- 
times three, and rare our or more. Dr. Dawson has not 
noted the cellular structure in his characterization of this 
species, but has mentioned it as a feature of his species, Sp. 
(Protosalvinia) Braziliensis. 
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