CARBONIFEROUS LYCOPODS AND SPHENOPHYLLS. CI 



on the bark become more prominent, and are a very chai'acteristic 

 feature of Bollirodendron punctatum, L. & H., and Bothrodendron 

 minutifolium, Boulay sp. Exquisite figures illustrating this 

 structure have been given by Weiss and Sterzel.' 



In Bothrodendron viinutifolium, Boulay sp., the subepidermal 

 scar is double, like that of Sigillaria, though on other species it 

 onlyappears as a longitudinal ridge, but this may arise from the two 

 scars becoming confluent. In some cases the two subepidermal 

 scars are united in their basal extremities, and are continued 

 downwards in a longitudinal ridge, having the appearance of a 



k stalked fork.'- 

 The cones of Bothrodendron minutifolium are comparatively 

 rare, but, from examples attached to the branches, I was able to 

 identify them as belonging to this species. I have met with very 

 few such specimens.^ 



In a specimen I have figured^ the cone-bearing branch is very 

 slender and leafy, and the cone is narrow, and, though incomplete, 

 measures 3^ inches long by rather over ^ inch wide. From its 

 state of preservation it is difficult to determine whether the 

 bracts ai"e arranged in whorls or in spirals. The whorls or spirals, 

 as the case may be, are placed verj"- close to each other, being 

 about TT^ of an inch apart. The basal or sporangium-bearing 

 portion of the bract springs from the axis at almost a right angle, 

 and the blade rises up from it almost parallel with the axis. The 

 structure of the sporangia cannot be ascertained. If the bracts 

 are in whorls, the structure of the cone differs much from those 

 of Lejndodendron and Sigdlaria, where the bracts are spirally 

 placed on the axis. The cone is also longer and narrower than 



'"Die Sigillarien der preussischen Steinkohlen-und Rothliegenden- 

 Gebiete II. Die Gruppe der Subsigillarien." — Ahhandl. der Kijnif]. Preuss. 

 geol. LandttanUait. Neue Folge. Heft. 2, p. 49., PI. I., figs. 3-4; PL II., 

 figs. 8-9, var. ; PI. I., fig. 6; PI. II., figs. 7 and 10. 1893. 



- See Annals and Mag. Xat. Hist., 6 Ser. , Vol. IV., p. 64, PI. IV., fig. 

 5t>- 1889. Also, Proc. Boy. Phys. Sac. Edinbiirgh, Vol. X., p. 93, PI. IV., 

 fig. 5*- 1889. 



■b ^ These specimens have been communicated to me by Mr. Hemingway, 



^Hi from Yorkshire. Their horizon is shale over the Barnslej' Thick Coal, 



^^H Middle Coal Measures. 



^H ■• Proc. Roij. Phys. So<: Ed., Vol. X., PL IV., fig. 6; Ann. and Mag. Nat. 



V 



