Crossotheca and Lyginopteris oldhamia

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Abstract
Kidston''s reference of the fructification Crossotheca is not vitiated by the several points which have been advanced against it. Nevertheless, the (apparent) total absence of true Crossotheca from coal-balls rich in L. oldhamia precludes its being the microsporangia of that species. Kidston''s species is therefore re-named C. kidstoni* (C. hoeninghausi) (p. 634). The great similarity of the sterile leaves of C. kidstoni to those of L. oldhamia (i.e., to Sphenopteris hoeninghausi) indicates that it belonged to a closely related species. Telangium scotti is probably the microsporangia of L. oldhamia while a second Lanarkian species bore the seed Lagenostoma ovoides. The plant which bore C. kidstoni was a species of Lyginopteris and its seed was probably Lagenospermum oblongum.

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