On Microzoa, &c. By C. D. Sherborn & F. Chapman. 739 



and a lower or black bed. We were unable to obtain any very- 

 definite information as to these strata, but from the foreman of the 

 works we learned that, whilst at Albert Gate the " black bed " was 

 almost at the surface, opposite Whitehorse Street, Piccadilly, where 

 the last shaft was sunk, there was a considerable thickness of the 

 " brown clay," with an occasional capping of gravel. 



Respecting the " brown bed," Professor Prestwich has favoured 

 us with the following note : — " It is probable that the brown clay 

 belongs to a slightly higher bed, and it may be that the colour is 

 due to the bed being slightly more porous, and to the percolation 

 of the surface waters having oxidized the iron in it, producing the 

 brown colour."* It may be well to mention that in washing we 

 found both clays to be equally tenacious, and that there was some 

 difference in the distribution of the fauna. Briefly here, and more 

 particularly in the description of species, we note that in the 

 brown or upper bed Lagenee and Planorbulinse were somewhat 

 abundant and very delicate, whilst in the black clay these forms 

 were very rare, the most abundant being Pulvinulinie (P. Boueana, 

 not found in the brown clay), Nodosarise, Dentalinte, and Cristel- 

 larim ; the Lagenie being represented by thicker and more massive 

 forms as L. apiculata and L. oviformis. 



Plate XVI. 

 Fig. 1. — Bulimina ajfinis d'Orbigny, x 50. 

 „ 2rt, 6. — Cassidulina svhglobosa Brady, x 50. 

 „ 3. — Cristellaria rotulata (Lamarck) var., x 20. 

 „ 4a, b. „ italica Defrance, var., X 20. 



„ 5. — Polymorphina gibba d'Orbigny, x 50. 

 „ 6. „ gulta d'Orbigny, x 50. 



„ 7. — Uvigerina asperula Czjzek, x 50. 

 „ 8a, 6. — Globigerina bulloides d'Orbigny, x 50. 

 „ 9. — Orbulina unkersa d'Orbigny, x 50. 

 „ 10a, b. — Pullen>a sphseroides d'Orbigny, x 50. 

 „ 11a, b. — Discorbinn rosacea d'Orbigny, x 20. 

 „ \1a-c. — Truiicatalina lobatuli Walker and Jacob, X 50. 

 „ 13a-c. „ refulgens (Montfort), X 50. 



,, 14a-c. — Planorbulina ammonoides (Reuss), x 50. 

 „ 15a-c. „ complanata (Reuss) var., X 50. 



„ rotula (d'Orbigny) (woodcut), 50. 



„ 16«-c. „ Ungeriana (d'Orbigny), x 50. 



„ 17a, b. „ Haidingeri (d'Orbigny) var., x 20. 



Anomalina sp. (woodcut), x 20. 

 „ 18a-c. — Pulvinulina repanda (Fichtel and Moll), X 50. 

 „ 19a-c. ,, ,, „ „ v. concamerata Will. 



x 50. 

 „ 20a-c. „ Boueana (d'Orbigny\ x 50. 



„ 21a-c. „ Karsteni (Reuss), x 50. 



22a-c ) 

 " 23a-c l " punctatula (d'Orbigny) var., X 50. 



„ 24. — Tinoporus bacidatus Montfort, x 50. 

 [The specimens will be deposited in the British Museum.] 



Bee also Prestwich, Quart. Journ. Geol. Soc, x. (18.14) pp. 401-19 



3 c 2 



