84 THE FORAMINIFERA 



instead of being acuminate, is broadly oval, in these characters 

 resembling Williamson's specimens rather than those of d'Orbigny 

 and Soldani. 



Cristellaria crepidula, Plate IV., Fig. 8. — In the literature 

 of the foraminifera no genus is more bewildering than Cristellaria. 

 Continental writers, one after another, have heaped up species 

 upon species, until the record of trivial names contains many hun- 

 dreds, and were we disposed to find a different name for each in- 

 dividual of this species that we have discovered, the task would not 

 be a difficult one, every variety of form being represented, from the 

 short and stout to the long and thin ; the chambers of some are 

 short and very broad, whilst those of others are long and very 

 narrow ; some specimens are almost straight, whilst others are bent 

 like a fish-hook, but still the same general characters prevail 

 throughout, and proclaim them to be all of the same species. C. 

 rofulata, on the other hand, is remarkably uniform in its plan of 

 growth. 



Polymorphina. — This genus is well represented, and one of 

 the species, P. complanata, d'Orb., Plate IV., Fig. 9, is new to 

 Great Britain, and interesting as being the type of the Polymor- 

 phincB which have the chambers arranged in a Textularian manner. 

 P. inyristiformis, Will., PI. IV, Fig. 10, is a handsome species, 

 having on a surface like finely ground glass, several perfectly trans- 

 parent tear-like ribs. 



The other species mentioned in the Catalogue being well- 

 known, require no particular comment. 



Globigerina inflata, d'Orb., Plate IV., Fig. 11. — The 

 numerous specimens of this species are neat and compact in form, 

 and more Rotaline than those figured by d'Orbigny* or by 

 Parker and Jones.t They present so little variation that they 

 misrht almost have been made in the same mould. 



Textularid^. — Although but five and twenty years have 

 passed since the pubUcation of Williamson's excellent monograph, 

 yet have such changes been made in the knowledge and nomen- 

 clature of the Bridsh recent Foraminifera, that of the six varieties of 

 Textularla therein enumerated, the names of two only remain un- 

 changed, and whilst Williamson then stated that he had not seen 

 any species of Bolivtna, there are now five species recognised as 

 British. 



Of Textularla proper we have from Galway three, or perhaps 

 four species. The most abundant is T. gramen, d'Orb., which here 

 is arenaceous. Many of the specimens being broader than they are 



* Foraminiferes des lies Canaries, 1839, PL II., Figs. 7-9. 

 f Foraminifera from North Atlantic and Arctic Oceans, 1864, PI. XIV., Figs. 16, 17. 



