130 Mr. E,. Kidston on the Relationship 



Ulodendron I ever saw was nearly as obtuse as that of Stig- 

 mariay \_Note. — The Stigmaria to which he refers is shown 

 in a woodcut, p. 462 (fig. 128), of the same work. This 

 example exhibits a truncated extremity.] 



1860. Eichwald. Lethsea Eossica, vol. i. p. 137. — Ulo- 

 dendron, in which is included Bothrodendron, is treated by 

 Eichwald as forming a true genus. He believed that cones 

 were attached to the Ulodendroid scars. Some of his figures 

 are very instructive, and will be more fully referred to again. 



1864. Macalister. Journ.Eoyal Geol. Soc. of Ireland, vol. i. 

 — This writer suggests that Ulodendron might perhaps be 

 Cycadaceous . He also points out the probable identity of Ulo- 

 dendron majus and U. minus. 



1868. Dawson. Acadian Geol. 2nd ed. p. 454. — Under 

 the name of LepidopMoios Dawson includes " those Lycopo- 

 diaceous trees of the Coal-measures which have thick branches, 

 transversely elongated leaf-scars, each with three vascular 

 points and placed on elevated or scale-like protuberances, long 

 one-nerved leaves, and large lateral strobiles in vertical rows 

 or spirally disposed ;" and he says : — " Eegardingiv. laricinus 

 of Sternberg as the type of the genus, and taking in connexion 

 with this the species described by Goldenberg and my own 

 observations on numerous specimens found in Nova Scotia, I 

 have no doubt that Lomatophloios crassicaulis of Corda and 

 other species of that genus described by Goldenberg, Ulodendron 

 and Bothrodendron of Lindley, Le'pidodendron ornatissimum of 

 Brongniart, and Halonia punctata of Geinitz, all belong to this 

 genus, and differ from each other only in conditions of growth 

 and preservation. Several of the species of Lepidostrohus 

 and Lepidophyllum also belong to Lepidophloios. The species 

 of Lepidophloios are readily distinguished from Lepidoden- 

 dron by the form of the areoles and by the round scars on 

 the stem, which usually mark the insertion of the strobiles, 

 though in barren stems they may also have produced 

 bi'anches ; still, the fact of my finding the strobiles in situ in 

 one instance, the accurate resemblance which the scars bear 

 to those left by the cones of the red pine when borne on thick 

 branches, and the actual impressions of the radiating scales in 

 some specimens^ leave no doubt in my mind that they are 

 usually the marks of cones ; and the great size of the cones 

 of Lepidophloios accords with this conclusion." 



1869. Carruthers. " On the Structure of the Stems of the 

 Arborescent Lycopodiacese of the Coal-measures ( Ulodendron 

 minus, Lindl. &Hutt.)," Monthly Microsc. Journ. Nov. 1869, 

 p. 225. — The internal structure of the plant is described. 

 Mr. Carruthers says of Megaphyton, which he unites with 



