rORAMINIFERA OF THE ATLANTIC OCEAN. 7 



there may be varieties or species which have a definite distribution in 

 the western Atlantic. The species of Glohigerina can hardly be con- 

 fused with any others, as the form of the test, coupled with the 

 peculiar reticulate surface, should at once distinguish them. 



GLOBIGERINA BULLOIDES D'Orbigny. 



Date 2, figs. 1-4. 



From a study of the vrestern Atlantic Albatross material the prob- 

 lem of what to refer to G. hulloides D'Orbigny has become a trying 

 one. So many forms have been assigned to this species from all 

 parts of the present oceans and from so many fossil formations that 

 a reference to the various figures show a very wide range. There 

 are very few specimens in all the Albatross stations examined that 

 can at all be assigned to this species as defined by D'Orbigny in his 

 Modele. Variety triloba Reuss is also very nearly wanting. There 

 are many young specimens of other species that seem to be referable 

 to G. bulloides, but it is easy to determine in a very large series of 

 specimens that these are really young of other species and not adults. 

 I have given in the accompanying table a list of the slides which have 

 been assigned to G. bjiUoides, but these are often marked with a 

 question. I have come to the conclusion that G. bidloides if present 

 is a very rare species in the western Atlantic. 



Glohigerina bulloides — material examined. 



Glohigerina bulloides, var. Iriloba^material examined. 



