436 Transactions of the Society. 



arbitrary, the only essential difference being in the character of the 

 spines, which are fine and regular instead of being coarse or tuber- 

 cular. P. hirsuta has been recorded as a fossil from the Crag, and 

 also in the recent condition by Brady, Parker, and Jones from the 

 West Indies. 



Note. — Fistulose specimens referable to P. lactea, P. gibba, and 

 P. rotundata, have also been observed in the Selsey shore-sands. 

 Rupert Jones and Chapman have devoted much labour to the 

 examination of the recorded specimens of fistulose Polymorphinm, 

 and the separation of these outgrowths into varieties (see Journ. 

 Linn. Soc. (Zool.) vol. xxvi. 1897). But the question of giving 

 varietal names to these abnormal outgrowths is very debatable. 

 The different forms assumed by these abnormal growths, both 

 free and attached, is, in our opinion (which is based upon a very 

 extended series of recent specimens dredged in the North Sea) due 

 entirely to the position assumed by the specimen at the time when 

 it entered upon the proliferous stage of shell-growth, and the 

 character and shape of the objects immediately surrounding it at 

 that time, or to which it was adherent. 



Uvigerina d'Orbigny. 



138. Uvigerina asperula Czjzek var. ampullacea Brady. 



Uvigerina asperula var. ampullacea Brady, 1884, Foram. 'Challenger,' p. 579, 

 pi. lxxv. figs. 10, 11. 



One fossil specimen, pyritised, and probably from the London 

 Clay. This variety has apparently not been previously recorded 

 in the fossil state. 



139. Uvigerina angulosa Williamson. 



Uvigerina angulosa Williamson, 1858, Kecent Foram. Gt. Britain, p. 67, 



pi. v., fig. 140. 

 Uvigerina pygmea var. angulosa (Williamson) Parker and Jones, 1865, 



Phil. Trans., vol. civ., p. 364, pi. xiii., fig. 68; pi. xvii., fig. 66. 

 I 'rigerina angulosa (Williamson) Brady, 1884, Foram. ' Challenger/ p. 576, 



pi. lxxiv., fig. 15-18. 

 Ditto. (Williamson) Brady, 1887, Synopsis British Becent Foraminifera. 



Rare, both in the recent and fossil states. As a recent shell it 

 is widely distributed, but usually occurs in fairly deep water ; as a 

 fossil it has been recorded from the later Tertiary deposits. 



