120 TllUNCI. 



later work, 1 this author has given some further description of 

 the Portland fossils, and discusses the question of terminology ; 

 the genus Cycadites being regarded by Brown as preferable to 

 Cijcadeoidea, and the name of Mantellia, proposed by Brongniart, 

 is thought to be unsuitable, having been already used by Parkinson 

 for a genus of fossil Zoophytes. At the present day 2 it is un- 

 fortunately not always held that the use of a particular name 

 by palseozoologists, is a fatal objection to the adoption of the same 

 for a fossil plant. Among the new figures added by Buckland to 

 those given in his earlier paper, we find some drawings of longi- 

 tudinal sections of petioles and axillary buds; the latter have since 

 been fully described by Carruthers as the inflorescence of 

 Bennettites. In 1870 an important monograph appeared by the 

 latter author on Fossil cycadean stems from the Secondary rocks 

 of Britain ; 3 the memoir contains full reference to earlier records 

 of cycadean stems, and includes figures and descriptions of the 

 following new genera Yatesia, Fittonia, Williamsonia, and 

 Bennettites. Five years later, several additions were made by 

 Saporta 4 to our knowledge of the stems of fossil cycads; he 

 founded the genera Bolbopodium, Cylindropodiam, Platylepis, 

 Clathropodiiim, and Cycadeomyelon. The numerous terms added or 

 substituted for those previously proposed by Carruthers have 

 involved the terminology of cycadean stem structures in some 

 confusion. In more recent years we have a valuable contribution 

 from Solms-Laubach and Capellini 5 on the examples of bennettite;m 

 stems preserved in Italian museums. These authors limit the use 

 of the term Bennettites to a single species, B. Gibsonianus, Carr., 

 and in a still later preliminary paper by Lester Ward, 6 Carruthers' 

 genus is absorbed into the more comprehensive Cycadeoidea. "We 

 may look for an important monograph at an early date by Lester 

 Ward and Knowlton on the exceedingly fine series of American 

 cycadean stems. In Dana's Manual of Geology 7 mention is 



1 (2), p. 453. 



2 See Quart. Journ. Geol. Soc. vol. 1. 1894, p. 435. 



3 Carruthers (1). 



4 Pal. Franc;, vol. ii. p. 245. 

 6 Capellini. 



6 Ward (1), p. 78. 



7 p. 472. 



