14 CONTKIBUTIONS TO FOSSIL BOTANY, PUBLISHED 1869. 



from the Bournemouth Leaf-bed. Ann. and Mng. Nat. Hist. 



ser. 4, vol. iii. pp. 10-13, pi. i. 

 The Ferns are rare in these beds. Four forms are figured, two pro- 

 bably fragments of Adiantum and of a species of Cyathea. The others 

 represent two species of Gleicheniaceae, for which the author proposes 

 the genus Mertensites. It exactly agrees with Debey and Ettings- 

 hausen's genus Didymosorus, containing three plants from the Creta- 

 ceous beds of Aix-la-Chapelle. 

 Williamson, W. C. On the Structure of the Woody Zone of an un- 



described form of Calaniite. Mem. Lit. and Phil. Soc. Manch. 



ser. 3, vol. iv. pp. 155-183, pi. i.-v. 

 The specimen is elaborately described, and the genus Calamopilus is 

 established for those forms of Calamite " in which the woody elements 

 consist of reticulated vessels associated with medullary rays, and hav- 

 ing verticils of medullary radii near the nodes." 

 Additional Notes on the Structure of Calamiies : 



Abstract. Proc. Lit. and Phil. Soc. Manch. vol. viii. pp. 153- 



155. 

 The author is satisfied that the stem had an exogenous growth, with 

 cryptogamous fruit. 

 On a New Form ofCalamitian Strobilus : Abstract. 



Proc. Lit. and Phil. Soc. Manch. vol. ix. pp. 7-9. 

 This fruit is supposed to belong to the author's genus Calamopitus, 

 and differs from the Volkmannia described in Journ. Bot., Vol. VI., 

 in the sporangia being supported on a sporangiophore rising from 

 the surface of the scales. 



On the Structure and Affinities of some Exoge- 

 nous Stems from the Coal-measures. Month. Micr. Journ. vol. i. 



pp. 66-72, pi. XX. 

 A new genus {Dictyoxylon) is established for the exogenous stem of 

 the coal-measm"es, whose tissues are composed of reticulated fibres. 



Synopsis of the Genera and Species described in the preceding Papers. 



Fungi? 



Archagaricon bnlbosum, globidiferum, radiatum, dendriticum, conglo- 

 meratitm, Hancock and Atthey, Ann. Nat. Hist. ser. 4, vol. iv. 

 p. 226. Carboniferous. Cramlington, Northumberland. 



