620 Floristik u. Systematik der Phanerogamen. — Palaeontologie. 



zum Sognefjord hinab erstreckt haben muss, gelebt hat. Später 

 sind im Laufe der Zeit noch mehr hocharktische Pflanzenarten, die 

 aus Russland und Sibirien eingewandert waren, im nördlichen 

 Skandinavien mehr oder minder weit nach Süden vorgedrungen. Als 

 am Ende der letzten Eiszeit das Landeis sich aus dem Süden und 

 Osten Norwegens zurückzog, war es nicht eine hocharktische, 

 sondern vielmehr eine subarktische Vegetation, die, dem zurück- 

 weichenden Eise folgend, aus Schweden ins südöstliche Nor- 

 wegen eindrang. N. Wille. 



Scott, Rina (Mrs. D. H.), On the Megaspore of Lepidostrobus 

 foliaceus. (New Phytologist. Vol. V. No. 5 and 6. p. IIb 

 — 119. pl. VIH, and text figures 24 and 25. 1906.) 



It is pointed out that, in a iarge number of sections from the 

 Lower Goal Measures of E nglan d, some curious looking megaspores 

 occur, each of which has an appendage attached to it. For these 

 the name Triletes diabolicus sp. nova, is provisionally adopted. The 

 megaspore is spherical, or egg-shaped, with a diameter of about 

 1,5 mm. There were probably four megaspores in each sporangium. 

 The appendage recalls the so-called „swimming-apparatus" of Azolla. 

 It was evidently of a fairly substantial nature, but its structure can- 

 not be determined. It was certainly not cellular, and its appearance 

 indicates, that it was part of the cell-wall probably derived from the 

 tapetal protoplasm. 



Megaspores have also been discovered in some of the sporangia 

 of certain specimens of Lepidostrobus foliaceus Maslen, a cone which 

 has hitherto been regarded as homosporous, and these agree ciosely 

 with Triletes diabolicus, even in the possession of an appendage. 

 The type-specimen of this cone is purely microsporangiate, but the 

 same section shows a very fine example of Triletes diabolicus com- 

 pletely enclosed in a sporangium. Thus there is üttle doubt that the 

 two new megaspores are reaily one and the same, that the 

 William son cone must in future be considered as a heterosporous, 

 not a homosporous one, and that Triletes diabolicus must disappear 

 and become the megaspore of Lepidostrobus foliaceus. 



The paper is illustrated by a rumber of excellent drawings and 

 photographs of the megaspores. Arber (Cambridge). 



Stopes, M. C, A N ew Fe r n f rom the Goal Measures: Tubi- 

 caulis Sutcliffii sp. nova. (Mem. and Proc. Manchester Lit. and 

 Phil. Soc. Vol. L. Pt. 111. No. 10. p. 34. With 3 plates and 

 2 text figures. 1906.) 



The specimen described in this paper was obtained from the 

 Lower Goal Measures of Shore, Lancashire, and is the first 

 member of the genus to be discovered from Britain. Only one 

 other species, the Tubicaulis Solenites of Gotta, from the Pcr- 

 mian of Germany, has so far been known. The new species 

 T. Sutcliffii, is founded on what appears to be the upper end of 

 the plant; the specimen being 4'/^' inches in length, and showing a 

 relatively small central axis, surrounded by a Iarge number of 

 petioles of varied size, between which are many adventitious roots. 

 The general structure and appearance of the plant is that of a her- 

 baceous Fern. The distinctive character of the numerous petioles, 

 which increase in size as they leave the axis, is only found in Ferns 

 that live in the ground. The form of the meristele of the petiole is 



