364 CALAMITES. [< 



must refer to Weiss^ Solms-Laubach- and other writers' for 

 further account of these types, and of another rare and little- 

 known form of cone, called by Weiss Cingularia*. 



Macrostachyan cones have been found attached to stems of 

 Calamites which are included in the sub-genus Calamitina 

 (p. 367). The larger size of Macrostachya as a distinguishing 

 feature is not always a safe test ; some cones which belong to 

 Palaeostachya [e.g. P. arborescens Sternb.] and Calamostachys 

 (e.g. C. Solmsi) are much thicker and larger than the majority 

 of species of these two genera. 



It would appear from the examples selected to illustrate 

 the connection between strobili and vegetative shoots, that the 

 Annularia type of branch usually bears cones which conform 

 to the genus Calamostachys (Stachanriularia); while the As- 

 terophyllitean branches — Galamocladus — are associated with 

 Palaeostachya and Macrostachya. But this rule is not con- ^^ 

 stant, and we are not in a position to speak of cones of aj^^ 

 particular type as necessarily characteristic of definite types of ^ 

 Calamitean shoots. 



Although it is admitted by the great majority of Palaeo- 

 botanists that the Calamites were all true Vascular Cryptogams, 

 the older view that some members of the Calamarieae are 

 gymnospermous has not been given up by Renault ^ This 

 observer has recently described some seeds which he believes 

 were borne by Calamitean stems ; he admits, however, that no 

 undoubted female cones of Galamodeyidron have so far been 

 found. In view of the unsatisfactory evidence on which Renault's 

 opinion is based, we need not further discuss the questions 

 which he raises. 



[The following specimens in the Williamson Cabinet in the British 

 Museum, may be found useful in illustration of the structure of Cala- 

 mites. 



SteTTis. (i. Arthropitys.) Young tioigs and small branches 1, 2, 6, 10, 14, 

 19, 116* 1002, 1007, 1020. 



^ Weiss, loc. cit. 



2 Solms-Laubach (91), p. 328. ^ gchenk (83), p. 234. 



-* Weiss (76), p. 88; (84), p. 162. Solms-Laubach, loc. cit. p. 334, fig. 47. 



•' Kenault (96), p. 132. 



