saccammina

from The Century Dictionary.

• noun A genus of Foraminifera in which the test is composed of agglutinated sandy particles (Agglutinantia) forming spherical or pear-shaped bodies with tubular prolongations at the ends and sometimes united in chains. On the interior the structure is labyrinthiform without septa. These bodies occur in the Silurian and Devonian, and in the Carboniferous at times compose entire strata, as at Elfhills in Northumberland.