120 



Bulletin 35 



268 



Page 284 



The most abundant Nodosarias are those identified as N. abyso- 

 rum and N. rugosa, both to a certain degree anomalous, the first 

 an account of the polymucronate apex, the latter on account of 

 the peculiar structure of its test. In the columns of the appended 

 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 examples or more. 

 500 500 to 1000 examples. 



100 100 to 500. 



50 " 50 to 100. 

 10 " 10 to 50. 



5 5 to 10. 



1 1 to .5. 



For the other localities I could not add such indications, 

 being without any information as to relative frequency of occur- 

 rence. I feel sure that many 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 deposit. 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 list.* There 

 are many other forms in my collection. Even of the forms ranked 

 under the names here given some have marked and constant 

 differences which might intitle them to varietal distinction. 



* 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. 



