140 ME ROBERT KIDSTON ON THE FRUCTIFICATION OF 



pinnules. This condition is said by Dr Stur to occur in his C. Schatzlariensis* 

 but the figures of this species given on his pi. xxxviii. are very imperfect, and 

 little can be learnt of the fruit from them ; and from the meagre evidence 

 afforded by the woodcut on p. 238, one would not like to say definitely whether 

 this fern should be referred to Calymmatotlieca or ZeilleriaA 



Calymmatotlieca bifida, L. & H., sp. 

 PI. VIII. figs. 1, 2, 3, 4, 5, 6a; PI. IX. figs. 16, 17. 



Calymmatotlieca bifida, Kidston, Quart. Jour. Geol. Soc, vol. xl. p. 591 (foot-note). 



Sphenopteris bifida, Liudley and Hutton, Fossil Flora, vol. i. pi. liii. 



Sphenopteris bifida, Hibbert, Trans. Roy. Soc. Edin., vol. xiii. p. 177, pi. vi. figs. 1, 2. 



Sphenopteris bifida, Kidston, Trans. Roy. Soc. Edin., vol. xxx. p. 537. 



Sphenopteris bifida, Miller, Testimony of the Rods, Edin., 1857, p. 466, fig. 129. 



Trichomanites bifidus, Goppert, Syst. fil. foss., p. 264, pi. xv. fig. 11. 



Todea Lipoldi, Stur, Cuba Flora, Heft. i. p. 71, pi. xi. fig. 8; Heft. ii. p. 291. 



Todea Lipoldi, Scbimper in Zittel, Handbuch der Paleontologie, Band ii. Heft. i. p. 107, fig. 75. 



Sphenopteris friyida, Heer, Foss. Flora Spitzbergens,% p. 6, pi. i. figs. 1, 3-6. 



(T) Sphenopteris geniculata, Heer, Foss. Flora Spitzbergens, p. 7, pi. i. figs. 8 and 10 (1 7 and 9). 



Spheyiopteris rutazfolia, Schmalhausen (not Gutbier), Mem. de la Acad. Imper. d. Sciences de Si 



Petersbourg, vii e s<$r. vol. xxxi. No. 13, p. 4, pi. i. figs. 1-4 (1 fig. 5), 1883. 

 Stap)ltylopteris Pcachii, Kidston (not Balfour), Trans. Roy. Soc. Edin., vol. xxx. p. 539, pi. xxxi. 



fig. 6. 

 Sphenopteris {Diplothmema) tracyana, Lesquereux, Coal Flora of Pennsyl., vol. iii. p. 766, pi. ci. 



fig. 2, 1884. 



Description, — Frond divided into two symmetrical lanceolate portions by a 

 dichotomy of the main axis. Pinnae sub-opposite or alternate, linear; pinnules 

 sub-opposite, or alternate and divided into 3-8 simple or bifid, narrow, linear, 

 single-nerved segments. Fruiting pinnae deprived of foliage pinnules, and 

 borne on the main rachis in the neighbourhood of the bifurcation. Fruit 

 consisting of about 16-20 linear sporangia arranged in a circle around a 

 common axis, and situated at the extremities of the bifurcations of the fruiting 

 pinnae. Sporangia free in their upper portion, but united below. 



Remarks. — The type specimen of this species, figured by Lindley and 

 Huttox, gives a very unsatisfactory idea of the true form of this fern, their 

 example having evidently suffered so much from maceration before fossilisation 

 took place, that the delicate limb of the pinnule has entirely decayed, the veins 

 only remaining. 



A much more characteristic figure than 'that given by the authors of the 



* Die Carbon-Flora, p. 265, pi. xxxviii. figs. 1, 2. 



f It is unfortunate that many of tbe figures on the plates of Dr Stur's Carbon-Flora are so 

 indistinct that it is quite impossible to discuss minute details of structure from them. 



X Kongl. Svenska Vetenslcaps-Akadcmiens Ilandlingar, Band xiv. No. 5, Stockholm, 1876. 



