PLATE CI. 



Gyrocerab Cyclops. 



Pagro 387. 

 See Plates 102, 103, 104. 

 lateral view of an indivldnal imperfect at tbe apex, showing tlie size and curvatnre of the tnbe, with the 

 transverse annulatinns on the internal mould corresponding to the ornaments of the test. A slight expan- 

 sion of the tube is shown at the aperture, and on the ventral side of the apical portion the revolving 

 ridges formed by the plications of the foliate expansions of the test. Upper Helderljerg limestone. 

 ClarktviUe, N. T. 



