3 
greatly exaggerated and no attempt is made to show the 
minute details of structure or to give the exact propor- 
tions of the different beds. As regards faults it is rarely 
easy in the case of the Naparima Rocks to ascertain 
whether a dislocation is certainly a fault or merely a 
fold. There is usually crushing and displacement accom- 
panied by disintegration especially along synclinal or 
anticlinal lines. The intimate relation of faulting and 
folding is shown by Mellard Reade in the Geological 
Magazine for 1896, page 353. 
Owing to the kindness of Mr. Morris I secured from 
the Spriugval© Quarry an example of Cypraea henekeni, a 
species discovered in the Haitian Miocene and not since 
recorded from any other localty. This specie is remark- 
able for the bosses or tubercles, which resemble those of 
C. mus an allied living species. 
The Corosal Road Ditrupabed and the Pointapier 
Ditrupabed have proved to belong to the Upper Miocene 
series called the Caroni series by Wall and Sawkins. The 
material supplied me by Mr. Rasp ass contains molluskaa 
fossils as well as the characteristic Foraminifer Planorhu- 
lina larvata. I give the names of some of these, but there 
are many more species. 
The Foraminifer Planorbulina larvata seems to have 
played in the Caroni Miocene Series a part similar to that 
of the Orbitoides in the Eocene formations. Both are 
extremely abundant in beds whose fauna and constitution 
demote a moderate depth, say fifty to two hundred fathoms 
of water. The Orbitoides type of foraminifera is alto- 
gether exinct : while the Planorbulina, which is an ex- 
treme cyclical development of thie type exemplified by 
PI. mediteranensis and PI. vulgaris is only found in 
the living state in the Pacific and Indian seas. 
f 
