Preputial calculus (calculus in the sheath, or bilocular cavity).
This characteristic shape is found neither in the Spyroidea (with bilocular cephalis) nor in the Cyrtoidea (with simple cephalis).
In the first and original family, the Zygospyrida, the shell is represented by the bilocular cephalis only.
bilocular, two-celled; as most anthers, the pod of Foxglove, &c.
Anthers inserted near the apex of the tube, short, fleshy, bilocular.
The simple spored rust first makes its appearance, and later the bilocular “mildew.”
bilocular bi·loc·u·lar (bī-lŏk'yə-lər) or bi·loc·u·late (-lĭt, -lāt')
Divided into or containing two chambers.