120 
BrLLKTix 35 
268 
Pap^e 2>s’/ 
The most abundant Nodosarias are those identified as X. abyso- 
rum and X. rugosa, both to a certain degree anomalous, the first 
an account of the pol\-mucronate apex, the latter on account of 
the peculiar structure of its test. In the columns of the ap])ended 
table relating to the Trinidad rocks an attempt has been made to 
give an idea of the relative frequency of occurrence of each of the 
forms named. This has been done according to the following 
scale : — 
1000 represents 1000 exanqdes or more. 
500 to 1000 examples. 
500 
100 
100 to 500. 
50 to 100. 
10 to 50. 
5 to 10. 
I to 5. 
50 
10 
5 
For the other localities I could not add such indications, 
being without an\’ information as to relative frequency of occur- 
rence. I feel sure that manj’ if not all the gaps in the table will 
hereafter be filled up when sufficient .search has been made for 
rocks of corresponding age and conditions of depo.sit. We have 
information of the occurrence in Cuba and Haiti of oceanic beds. 
The table clearly shows the strong resemblance between the fossil 
foraminiferal faunas of Trinidad and Barbados. 
The table is not intended to give an exhaustive li.st.* There 
are many other forms in 1113’ collection. Even of the forms ranked 
under the names here given .some have marked and con.stant 
differences which might intitle them to varietal di.stinction. 
* I might also add that if my object had been to give a long list of 
names I might have almost doubled the number given in the table, so 
numerous are the varieties occurring in the Trinidadian rocks. 
