502 Scientific Proceedings, Royal Dublin Society. 



scars, in each of wliich a central bundle scar was observed — features which 

 Brongniart, in his descriptive letter, had already noted. 



The three species named are in reality, it is now generally agreed, parts 

 of one and the same species Bolhrodendron (Ci/closiigma) kiltorkense. 

 Brongniart had, in his published report, proposed the name without 

 description of Lepidodendron Griffithii'^ for one Kiltorcan specimen. This 

 specimen, whose existence has been questioned (5), is fortunately preserved 

 with its original label and number — 14 — in the Botanical Division, National 

 Museum, Dublin, and is simply the terminal forking leafy shoot of B. 

 hiUorlcense (Plate XXXV, fig. 1). 



The illustrations accompanying Haughton's paper as drawn do not give 

 in detail the characters of the leaf-scars. Examination of the drawings 

 shows that his artist made a rough sketch of the general surface-markings of 

 the stem, and superadded the sketches of the leaf-scars without indicating 

 the central leaf-bundle scar which Brongniart and Haughton mention in 

 their descriptive accounts. This explanation is necessary to prevent fellow- 

 workers, when making their deductions, from attaching too much importance 

 to the drawings of the now unascertainable type specimens of B. kiltorkense 

 (5). (See, e.g., 0. Heer, Foss. Flora d. Baren-Insel, p. 43.) 



An interesting feature in this connection is the fact that Haughton had 

 already, in 1853, figured B. kiltorkense, and recorded it from eight different 

 localities of Ireland, but not from Kiltorcan itself,^ as Sigillaria dichotoma (6). 

 The leaf-scars are drawn without the — at this time — unobserved bundle-scar. 

 One specimen so named is preserved in the Geological Survey Museum in 

 Jermyn Street, where this summer Dr. G. L. Kitchin, the curator, and 

 Mr. Allen gave me every facility for the examination of the Museum's 

 abundant Kiltorcan material, some of which was actually collected by 

 Edward Forbes himself, and the Survey's fossil collector, Gibbs. The 

 specimen in question shows on one side scraps of stems with typical 

 Bothrodendron leaf-sears. On the other side of the slab there is a large 

 but poorly preserved impression of a fluted stem, with here and there 

 Ulodendroid suggestions. 



The earliest illustration of Bothrodendron I have been able to find occurs 

 in Rhode's " Beitrage zur Pflanzenkuude der Vorwelt," a work published 

 in 1820, and containing an illustrated account of the fossil plants of 

 Silesia (7). 



' The names C. Griffilhii and L. Griffithii had no known connection with one another when first 

 given. They are now known to he synonyms for £. kiltorkense. 



^ C. mimitum had already, Haughton mentioned, been figured in Lyell's Manual (5th ed., p. 418), 

 and in the Journal of the Geol. Soc, Dublin (vol. vi, p. 235), as Lepidodendron mintitum. 



