262 MR. F. CHAPMAN ON SOME OF THE [}^&Y I9OO, 



In 1 888 Dr. H. B. Brady gave aii account of four species of 

 Lagena from the Woolhope Limestone of the Malverns, etc. 1 



I have also frequently met with Lagena in the Wenlock Lime- 

 stone of Shropshire. 



Terquem 2 described four species of Placopsilina attached to 

 crinoid-stems from the Upper Silurian of Waldron (Indiana) ; and in 

 the same paper he also figured and described casts of foraminifera 

 which he referred to the genera Lagenulina, Cristellaria, Orbulina, 

 Globigerina, and Fusulina from the Devonian of Paffrath. 



Foraminifera are, however, rare at the best until the Lower Lime- 

 stones of the Carboniferous period are reached. 



In conclusion my best thanks are due to Prof. T. Rupert Jones, 

 F.R.S., for many valuable suggestions made during the writing 

 of this paper. 



EXPLANATION OF PLATE XV. 



Fig. 1. Shaly limestone with Spirillina Groomii, in section. X 37. 



2. Lagena Icevis (Montagu). X BO. 



3. Lagena apiciilata (Reuss). X 60. 



4. Lagena ovum (Ehrenberg). x 60. 



5. ? Nodosaria (G'landulina) sp., cf. Glandulina pygmcea, Terquem. X 60. 



6. Nodosaria (JJentalina) abnormis ? (Reuss). x 70. 

 Figs. 7 & 8. Margin ulina soluta (?) Reuss. X 60. 



Fig. 9. Cristellaria acutauricularis? (Ficlitel & Moll), x 60. 



10. SpiriU'uia Groomii, sp. nov. Lateral aspect. X 1-1-2. 



11. The same. Peripheral aspect, x 112. 



Discussion. 



Prof. Groom expressed his gratitude to the Author for his thorough 

 investigation of the Cambrian foraminifera. Foraminifera had 

 rarely been described from the oldest rocks iu any part of the world, 

 and many of the determinations appeared to be uncertain. In 

 Britain no member of this group had been recorded from any horizon 

 older than the Ordovician. Spirillina was now proved to be a very 

 old genus. He might add that the Author had recognized forami- 

 niferal casts in the Hollybush Sandstone and Hollybush Quartzite, 

 although, so far, it had been found impossible to determine the 

 genera. 



Prof. Sollas congratulated the Author on the results of a very 

 careful and thorough piece of work. It was interesting to observe 

 that in this case lithological and paheontological evidence concurred 

 in indicating that the foraminiferal limestone had been deposited in 

 comparatively shallow water. The account of the distribution of 

 foraminifera in Palaeozoic systems with which the paper concluded 

 would prove of great use to students; and in this connexion it might 

 be mentioned that an oolitic limestone, the age of which was shown 



1 ' Note on some Silurian Lagena' Geol. Mag. pp. 481-84. 



2 Bull. Soc. geol. France, ser. 3, vol. viii (1880) pp. 414-18 & pi. xi. 



