PLATE IV. 
Fig. 1. A typical section of the Pokolbin limestone, with shell-fragments and tests of 
Nubecularia stephensi, Howchin. — x 36. 
Fig. 2. Nodosaria (D.) perminna, Spandel, sp., in the limestone of Pokolbin. — x 36. 
Fig. 3. Geinitzina postcarbonica, Spandel, in the limestone of Pokolbin. — x 36. 
Fig. 4. A thin section of Pokolbin limestone, showing polyzoa and crinoid fragments ; also a 
test of Nubecularia stephensi, Howchin, nestling in a fenestrule of a polyzoan. — x 14. 
Fig 5. A thin slice of Pokolbin limestone, showing crinoid fragments, polyzoa, and tests of 
Geinitzina \ and Lnnucammina . — x 14. 
