HEEll— KILTOKKAN FOSSILS. 169 



great difference had begun to arise, which has increased immensely 

 up to the present time. The climate must have been not only more 

 equable, but warmer, as is shown by the coral-banks which were 

 formed at that time in Spitzbergen, as well as by the enormous tree- 

 like Cryptogams and the large-leaved ferns which Bear Island pro- 

 duced. 



Appendix. 



On Cyclostigma, Lepidodekdeon-, and K^o^vcix, fi-om IviMOKKAif. 

 By Prof. OsAVALD Heer, F.M.O.S. 



[Plate IV.] 

 (Eeacl Januaiy, 10, 1872*.) 



1. CxcLosTiGMA KiEioEKExsE, Haught. Ann. & Mag. Nat. Hist, 

 ser. 3, vol. v. p. 444. 



Stem clothed with a finely wrinkled bark. It is covered with 

 numerous and very close striae ; and these very fine striae pass away 

 into spiral lines, and are in some places joined together. When the 

 outer bark is wanting we have only these fine striae. Such a spe- 

 cimen I received as C Griffltlii, Haught. 



On the bark there stand in regular rows small round warts, which 

 have a circular depression at the top. These are surrounded by a 

 projecting rim, which is often striated with fine cross lines. Some- 

 times these warts look like small hollows having a smooth middle part. 

 The warts are about 2 millims. in diameter. They are from 8 to 13 

 millims. apart, and form highly oblique transverse rows. PI. IV. 

 fig. 5a is a piece of a stem ; 56 a portion with the wart, magnified. 



Brandies. — These agree entirely with the stems in the formation 

 of the bark and in the warts. The bark is also wrinkled and covered 

 with very fine and close striai. The warts are from 6 to 8 millims. 

 apart, and in a branch 13 millims. broad there are two or three in 

 the oblique row (fig. 4, and, a portion enlarged, fig. 46). 



As remains of fruit-cones, which Schimper has described as Lejpi- 

 dostrobus Bailyanus (Traite de Paleontologie Veget. ii. p. 71), are 

 often found near the stems of this species, they probably belong to 

 it. In support of this view is the fact that in Bear Island also the 

 cone-scales have been found near the fragments of the stem (see ray 

 Tossil Plora of Bear Island,' pi. xi. fig. 3 c). These cones differ 

 from those of Lepidodendron in their firm and almost woody base, 

 Avhich is marked with a longitudinal furrow, and in the remarkably 

 long bristle-like front portion. 



2. CrcLOSTiGMA MiNTTTUM, Haught. ibid. p. 444. 

 Lepidodendron minutum, Haught. Journ. Geol. Soc. Dublin, vol. i. 



p. 235. 



Lepidodendron, sp., Lyell, Elements of Geol. ed. 6, p. 521, fig. 585. 



* See p, 85 of the present volume. 



