1900-1.] Foraminifera in the Living Condition. 393 
lina polymorpha could easily move along the rod-like spicule when 
living ; and in that condition always appear to have carried an 
arming of slender sponge-spicules round the region of the oral 
aperture, which might serve to guide the extruded sarcode and act 
as axes of support. 
In this remarkable adaptation of a foraminiferal shell to the 
surface on which it lives, Anomalina polymorpha shows a parallel- 
ism with Orbitolites marginalise which at Funafuti was 
found to frequently present the most unconventional modifications 
of the ordinary discoid form, often appearing as a sinuous, 
contorted or Shaped series of chamberlets when seen in ‘vertical 
section in the cores of the Atoll-boring ; and in the lagoon* it was 
often found to have attached itself to the fronds of Halimeda , and 
even to have wound itself round the cylindrical stems. Both in 
the case of Anomalina and Orbitolites, the more regular form 
seems to be the simpler in construction, because formed on a 
uniform and successional plan of growth, the wild-growing varieties 
being a later and hence secondary modification. In the examples 
quoted, it is possible that this anomalous Anomalina was derived 
from the regular Discorbince, and from Orbitolites the genus 
Nubecularia may have been derived through the more regular 
or intermediate genus Miliolina. 
Figs. 4 and 5 represent specimens from Station 232, and fig. 6 
from Station 192a. 
Plate II. 
The specimens shown on this plate were obtained at Station 344, 
(April 3, 1876), off Ascension ; lat. 7° 54' 20" S., long. 14° 28' 20" 
W. ; depth 420 fathoms. 
The specimens of Foraminifera represented in fig. 1 are probably 
the young of Carpenteria balaniformis , Gray. This species is in 
its earliest stage remarkably like the erect forms of the Botaline 
type, as Truncatulina refulgens and Pulvinulina Micheliniana. t 
These young forms are seen living attached to the stems of hydroids, 
and a noteworthy feature is the presence of a conspicuous bunch of 
* Chapman, “On Foraminifera from the Funafuti Lagoon,” Journ. Linn. 
Soc. Lond., Zool . , vol. xxviii., 1901, p. 181, pi. xx. figs. 1-3. 
+ Rep. Chall., vol. ix. p. 677. 
