PLATE CII 
Gyroceras Cyclops. 
Page 387. 
See Plates 101, 103, 104. 
Lateral view of an imperfect specimen, showing- the curvature of the tube and the annulations of the internal 
mould. Several of the foliate expansions of the test are represented extending from the concave dorsal 
side into the surrounding matrix. Upper Helderberg limestone. Helderberg mountains, N. Y. 
