302 Mr. J. Smitii on the Upper Silurian 



In quartzltes etc. of pre-Cambrian age in Brittany very 

 minute things have been got, globular or nearly so, spiny 

 and perforated, sometimes in strings, the lai'gest only the 

 25V0 ^^ ^'^ '\n(A\ indiameter (Ann. Soc. Gdol. Nord, vol.xxii.). 



Ehrenberg, in 1858, figured live genera from the blue clay 

 of the Baltic provinces, a horizon now known to belong to 

 the Lower Cambrian. They are glauconite casts referable 

 to the genera Nodosaria, Rotalina, and Pulvinulina. 



Foramiiiifera have been recorded from the Cambrian 

 system of Siberia (Q. J. G. S. vol. Ivi.) and from the Saint 

 John Series of JSew Brunswick (Tr. N. Y. Acad, of Sci. 

 vol. xii. for 1893). 



In the Q. J. G. S. for 1900 Chapman has figured and 

 described nine species of Foraminifera from the Upper Cam- 

 brian in the Malverns. They have all been drawn from 

 polished specimens of the rock, and comprise the genera 

 Spirillma, Lagena, Nodosaria, Marginulina, and CristeUaria. 

 (Jiiapman, in this paper, says : — " Foraminifera are, however, 

 rare at the best until the lower limestones of the Carboniferous 

 period are reached." 



Above the Bala Limestone of Guildfield, near Welshpool, 

 Foraminifera have been got (Geol. Mag. 1882). 



Chapman, in his ' Foraminifera/ p. 254, says that in the 

 Llandovery beds of Cwm Symlog Dentalma, Textidaria, 

 and Rotalio.? have been got, and, at p. 255, Hyperammina 

 and Stacheia were got in Gotland ; he also adds that Vine's 

 Silurian genus Psamrnosiphon has been relegated to the genus 

 Stacheia. 



Brady, in 1888, figured four species of Lagena from the 

 Upper Silurian of England,, and I supplied him with some of 

 the specimens (Geol. -Alag. for 1888). 



Four species have been got in the Upper Silurians of 

 Indiana, and casts from the Devonian of Paffrath, referable 

 to the genera Lagenulina^ CristeUaria, Orhulina, Glohigerina, 

 and Fusulina. 



Gothland Upper Silukian Foraminifeea. 



To the casual visitor to Gothland the rocks present bat 

 two petrographical series — a great limestone-bed, and under 

 it a rather thicker shale-bed with limey bands and nodules 

 more or less through it, the whole being contained within 

 ■240 feet of thickness. In the south of the island there is 

 sandstone under a thick limestone, and on this ):ioint there 

 is a division of opinion, the minority, following Murchison, 

 iioklins: the notion that there is an ascendino- series towards 



