678 Transactions of the Society. 



West Wittering and Earnley, some miles north-west of the north- 

 west limit of our researches up to that date, and again in a 

 remarkably rich gathering made recently at the west end of the 

 " House-pond " Beds, just south-east of the sluices, where one of 

 the principal exposures of Bracklesham Bay fossils occurs between 

 tide-marks. It would, therefore, appear to be present wherever 

 any Foraminifera are to be found derived from the Eocene clays 

 of the Bracklesham Beds. 



In making a more careful and detailed study of the specimens 

 originally selected from the main gathering referred to in our first 

 paper, we have found the first specimen picked out, which we then 

 referred to the species Planorhulina costellata of Terquem. This 

 specimen exhibits certain noteworthy peculiarities, to wit, the large 

 (megalospheric) size of the primordial chamber, which is followed 

 by a curved chamberlet about three times the length, and equal 

 in breadth to the primordial chamber. The Pavonine stage is 

 represented by the next three chambers, all of which are equal 

 in diameter to the primordial chamber. The fifth chamber is 

 completely annular, retaining the same breadth. From this point 

 the annular chambers show a very slight increase in diameter. 

 Three such annular chambers are visible in the specimen under 

 consideration, which is quite flat, the septal lines being distinctly 

 marked, although flush with the surface. From this point the 

 character of the shell changes entirely : the annuli are but very 

 slightly defined, and the shell increases considerably in thickness. 

 The surface of these outer rings is strongly crenulated, as in 

 fig. 5 of the original plate, and this gives a very decided, but illusory 

 suggestion of a division of the annular chamber into chamberlets. 

 The specimen is somewhat broken round the edges, but there 

 were probably at least three annuli presenting this crenulated 

 surface. It is possible that further specimens, should we be so 

 fortunate as to discover them, may necessitate the separation of 

 this form from C.polygyra. 



Planorhulina d'Orbigny. 

 174. Planorhulina mediterranensis d'Orbigny. 



Planorhulina mediterranensis (d'Orbigny) 1826, Ann. Sci. Nat., vol. vii. p. 280, 



No. 2, pi. xiv. figs. 4-6 : Modele No. 79. 

 Planorhulina vulgaris (d'Orbigny) Williamson, 1858, Eecent Foram. Gt. 



Britain, p. 57, pi. 5. figs. 119, 120. 

 Planorhulina mediterranensis (d'Orbign>) Brady, 1884, Foram. ' Challenger,' 



p. 656, pi. xcii. figs. 1-3. 

 Ditto. (d'Orbigny; Brady, 1887, Synopsis British Eecent Foraminifera. 



Becent and fossil, the latter being much larger than the former, 

 which are of the regular type commonly found in British gather- 

 ings. 



