Fig. 
34. 
. P. tuberculata, D'Orbigny, sp.: a and 4, after D'Orbigny (Miocene) ; c and d, after Egger 
ON THE GENUS POLYMORPHINA. 253 
P. ornata, Karrer. From Karrer's drawings (Miocene). 
(Miocene). 
PLATE XLII. 
. Polymorphina spinosa, D'Orbigny. After D'Orbigny (Miocene). 
. 97. 
. 38. 
P. hirsuta, n. s. Drawn from a Crag specimen. 
P. Orbignii, Zborzewski: a represents “ Globulina horrida," Reuss (Cretaceous); à represents 
€ G. tubulosa,” D'Orbigny (Miocene) ; c, Crag specimen; d represents “ Polymorphina fistu- 
losa,” Williamson (recent) ; e, recent compressed form; f and y, Crag specimens ; h represents 
“ Guttulina damecornis,” Reuss (Cretaceous), enlarged from Prof. Reuss's figure; à represents 
the parasitic variety adherent to a broken mollusk-shell, recent, from the English Channel 
(there is a little adherent specimen of Polytrema (r) on the same shell); j, parasitic specimen 
from the Crag; k and / represent a portion of the shell-wall uncovered by the breaking off of 
the cervicorn growths, showing large perforations; m represents a striato-fistulose specimen 
from the Crag. 
DIMORPHINA. 
Fig. 39. Dimorphina tuberosa, D'Orbigny: a, from D'Orbigny's * Modèle no. 60;” b, a less regular | 
specimen, from the Crag. 
Fig. 40. D. obliqua, D'Orbigny. After D'Orbigny (Miocene specimen). 
Fig. 41. D. compacta, Jones, Parker, and Brady. From a Crag specimen. 
POSTSCRIPT. 
We have not, perhaps, stated with sufficient clearness how close we regard the rela- 
tionship between POLYMORPHINA and UvicERINA. Although we have not felt justified, 
under the limitations of our present knowledge, in uniting these two groups, we could 
adduce very strong arguments in favour of such a course. We accep 
these genera as a provisional and convenient arran 
t the separation of 
gement rather than as a fixed decision 
founded on definite or strongly marked characters. 
