758 Transactions of the Society. 



Pulvinulina repanda (Fichtel and Moll) var. concamerata 

 Williamson, plate XVI. rig. 19 a-c. Serpula concamerata 

 Montagu, Test. Brit., Suppl., p. 160 (fide Williamson). Rotalina 

 concamerata Williamson, 1858, Recent. For. Gt. Brit., p. 52, plate iv. 

 figs. 102-3. — A limbate variety of P. repanda. Rare; brown clay. 



Pulvinulina Boueana (d'Orbigny) plate XVI. fig. 20a-c. 

 Botalia Boueana d'Orbigny, 1846, Foram. Tert. Vienne, p. 152, 

 plate vii. figs. 25-27. — A much ornamented form, having a delicate, 

 thin keel. Extremely abundant, and varied in its ornamentation, 

 in the black clay, and not met with in the brown. 



Pulvinulina Karsteni (Reuss), plate XVI. fig. 21 a-c. 

 Botalia Karsteni Reuss, 1855, Z. d. geol. Ges., vii. p. 273, plate 

 ix. fig. 6. — Rare ; brown clay. 



Pulvinulina punctatula (d'Orbigny) varr., plate XVI. figs. 

 22«-e and 23a-c. Botalia punctatula d'Orbigny, 1826, Tabl. 

 Method., p. 273, No. 25 ; modeles, No. 12. We have placed 

 these two examples together, believing them to be varieties of the 

 same form. From the brown clay. 



Sub-family Tinopofjn,e. 



Tinoporus Montfort [1808]. 



Tinoporus baculatus Montfort (Carpenter), plate XVI. fig. 21. 

 Montfort, 1808, Conchyl. Syst., i. p. 146, 37" genre. Carpenter, 

 1860, Phil. Trans., p. 557, plates xviii. and xix. — A small example 

 of this form, with a granular surface, occurred. Our specimen is 

 comparable with Dr. Carpenter's figure in Introd. Foram., plate 

 xv. fig. 8. One only found ; black clay. 



In the following table will be found a complete list of all the 

 Foraminifera at present known to occur in the London clay. We 

 have noted the localities and the authority for their occurrence, 

 and have given our Piccadilly specimens in a separate column, 

 noting their relative abundance. 



The following books and memoirs include references to the 

 Foraminifera of the London clay : — 



1834, Wetherell, T. N., " Observations on a well dug on the 

 south side of Hampstead Heath " [the Foraminifera figured and 

 partly described by J. De C. Sowerby], Trans. Geol. Soc, 1834, 

 ser. 2, v. p. 131, plate ix. figs. 3-10 and 12-20. 



1864, Jones, T. Rupert, and Parker, W. Kitchen, " On the 

 Foraminifera of the London Clay [of Middlesex and Surrey]," 

 Geologist, 1864, vii. pp. 85-88. This paper deals with the 

 nomenclature of Wetherell's figures, he having merely indicated 

 the genera and gives a list of all known forms. 



1854, Prestwich, Joseph, "On the Thickness of the London 



