1910. NATURAL SCIENCES OF PHILADELPHIA. 43 



The specimen has been very kindly identified by Dr. Henry A. 

 Pilsbry as Modiolaria marmorata Forbes. This is a small Modiolaria 

 (8 mm. x 5 mm.) which for protection buries itself deep in the test of 

 such large Ascidians as Pkalusia mammilata or Ascida mentula. It 

 is an abundant form at Naples, and well worth a more extended study. 



