12 
Explanation of Plate I. 
Cryplophragmus antiquatus Raymond. 
Figure 1. Fragment of a specimen from which only a part of the outer sheaths 
have been removed by weathering. In places where the specimen 
is broken the transverse partitions may be seen. The figure is 
in a reversed position, up side down. About natural size. 
u 2 . A photograph of the only specimen so far found preserving a termination. 
The bulb-like enlargement of the upper end is shown, also the 
curved extension of the outer sheath above. (Indicated by arrow). 
Notice the calcite-filled chambers (A), the empty ones (B), and 
those filled with lime-mud (C). Six-tenths natural size. 
“ 3. Photograph of polished longitudinal section showing inner tube with 
convex partitions, the "clear zone” near the tube, and the sheaths 
outside. Natural size. 
“ 4 The upper, naturally weathered end of the same specimen, enlarged. 
Notice the differential weathering, and the faintly indicated 
radial tubes of the sheaths. 
