THE KAMPA SYSTEM. 
45 
Above the Actasonella horizon, the limestone contains equally con- 
spicuous remains of a large Gryphoea or Ostrea, 
v^^lu^arfs}'^^'^^^''^ probably G. vcskuiaris Lmk. ; with this are 
associated Orbitoides in gradually increasing 
numbers, and the overlying beds are composed almost entirely of 
these foraminifera. Echinoids also occur throughout this limestone, 
but are, as a rule, too badly preserved for determination. 
The third massive limestone is overlain by a series of soft, thin- 
bedded limestones, containing echinoids and 
Horizon of Vola qua- lamellibranchs, the latter represented chiefly by 
drtcostata. ' r J j 
Vola quadricostata Sow. The echinoids are 
usually casts, composed of white crystalline calcite with little or no 
trace of test ; they appear, however, to include the genera Holectypus, 
Echinanthus and Pyrina. 
Above this is a band of brown limestone, containing fragments of 
small brachiopods and large numbers of forami- 
Horizon of OrWolites .jgj.^ chiefly Orbitoides sp. and Orbitolites 
macropora. ' ■' ' 
macropora Defr. 
This is overlain by a series having very well-marked characters 
and readily recognised in all sections. It con- 
Umtsioat -viVi Hemi- i i- ^ r ^ 
pnetistes, Plicatula and sists of thm-bedded limestone, first grey then 
Lithothamnion. reddish and arenaceous, passing up into a thin 
band — only a few inches in thickness — of limestone containing immense 
numbers of calcareous algae. Certain bands of the rock are composed 
almost entirely of large spheroidal nullipores, apparently belonging to 
the genus Lithothamnion (see PI. 13, fig. 2) ; the other fossils include 
echinoids, lamellibranchs, corals and bryozoa, of which the following 
forms have been recogn\scdi — H emipneustes sp., Plicatula sp.,^ 
Cyclolites regularis Leym., Caprina sp. 
' This fossil was, in the preliminary note published m Records, G. S. I., 
XXXII, pt. 2. referred to as Hintiites (?) foliaceus Noetl. Subsequent examina- 
tion of a larger number of specimens shows that it should probably be referred to 
the genus Plicatula ; more than one species appear to be present, one of which is 
probably identical with Noetling's Hinnites foliaceus from the maestrichtien of 
Paluchistan ; another may be PL hirsuta Coquand. 
