Hamilton. — On the Foraminifera of the Tertiary Beds at Petane. 395 



worn, irregularly striated, and rare. I may have to call it by a different 

 name. Kecent in Atlantic, Arctic, British Seas ; fossil in London clay, 

 Sheppey. 



Sub-Order PEEFOBATA. Fam. Lagenida. 

 Fig. 9. Nodosaria ( Cristellaria } crepidula. Fichted and Moll. 



Very rare and choice here. Middle size, flat worn, septas indistinct. 

 Eeeent, Atlantic, and Arctic ; rare. Fossil, boulder clays, Cheshire ; 

 London clay. Miocene, Yarra Yarra, trias, lias, and chalk. 



Fam. Globigerinida. 

 Fig. 10. Texularia agglutinans. (Type) D'Orbigny. 



Here this species varies considerably fi'om the forms described by Parker 

 and Jones in Phil. Trans., 1865 (N. Atlantic and Arctic Foraminefera), and 

 again the forms there figured differ much from the figures given by Mackie 

 and Jones in "Geologist." * * * It is found in Arctic and Davis Straits, 

 20 to 30 fathoms, rather common ; also off Norway, 30 to 200 fathoms. 

 Fossil in chalk, eocene, miocene, etc., and its representatives T. exiviice. and 

 T. gibhosa in carboniferous limestone of England and Wales. 



Fig. 11. Texularia agglutinans, var. (Bigenerina) nodosaria. D'Orb. 



This form begias with a Texularian, and passes into a Nodosarian 

 growth. The transition between the variety and the type can be easily 

 traced in the material sent. Occurs, recent, all over the world. It has its 

 representative in the carboniferous shales of England and Scotland. 



Fig. 12. Rotaiia beccarii, var. craticulata. Parker and Jones. 



I think that this is the first time that this variety has been found fossil. 

 It was described by Parker and Jones in Phil. Trans., Koyal Soc, Lond., 

 1865. 



Here it is the commonest form, and rather large. It is one of the highest 

 of the Eotalinge, having a rough outline of a " canal system," characteristic 

 of the Nummulinidffi. Eeeent in the Fiji Islands. 



Fig. 18. Planorbulina arcta, var. ( Truncatulina ) lobatula. W. and J. 



A plano-convex form of the type, having the chambers embracing on the 

 upper side ; under side flat, showing primordial. Eeeent in all seas. 



Fossil in London clay, chalk ; represented in the carboniferous lime- 

 stone by T. carbonifera, Brady, and T. Boueana, D'Orb. 



Fam. NUMMULINIDA. 



Fig. 14. Polystomella crispa, var. Nonionina umbilicatulu, Montague. 



Eare and small. A variety of P. crispa, in which the canal system 

 processes are obsolete. Eare to common in various depths of North 

 Atlantic and Arctic Oceans. Eare as British. 



Fossil — Boulder clays, London clay, miocene, chalk, 



