294 



HENRY B. BllADY. 



which were preserved in bulk, and I have been enabled 

 thereby to increase considerably the category of known 

 pelagic species. The following list is as nearly complete as 

 I am at present able to supply, but it is not improbable that 

 there may be one or two varieties of Globigerina still to* add. 

 The Glohigerina Inrsuta, Gl. {Orhulinci) acerosa, and Gl. 

 {Orh?)continens, of Major Owen's paper, are all abundant in 

 the "Challenger" gatherings, but their characters do not 

 appear to be sufficiently distinctive nor sufficiently uniform 

 to warrant separation from their congeners, and they have, 

 therefore, been omitted from the list, or rather, are included 

 in the species to which I believe them to belong. 



Globigerina btilloides, d'Orb. 



— infiaia, d'Orb. 



— nibra, d'Orb. 



— sacculifera, Brady. 



— coiiglobata, nov. 



— cequilateralis, nov. 

 Gl. {Orbulina) nniversa, d'Orb. 

 Hastigerina pelagica (d'Orb). 



— — var. Murray ana, 

 Wy. T. 



Fullenia obliqueloculata, P. and J. 

 Sphceroidina dehiscens, P. and J. 

 Candeina nitida, d'Orb. 

 Fidvinulina Menardii (d'Orb). 



— — var. tuniida. 



— canariensis (d'Orb). 



— crassa (d'Orb). 



— Micheliniana (d'Orb). 

 Ci/mbalopora buUoides, d'Orb. 

 Chilostomella ovoidea, Reuss. 



Some few of these, notably Candeina nitida and Chilo- 

 stomella ovoidea, are of extreme rarity in the surface gather- 

 ings, whilst JZas%erma/>e/a^ica and Cymhalopora hulloides, 

 though tolerably abundant at times, are very local in their 

 distribution. 



So much has been written on the relation of the surface 

 Rhizopod-fauna to the organic remains found at the sea- 

 bottom, and the conclusions arrived at by different observers 

 are so diverse, that a brief statement of the facts brought 

 into prominence by these investigations, may not be without 

 its use. On a question concerning which so little in the 

 nature of positive evidence can be adduced, it is necessary 

 to speak with great caution, and it is possible that even 

 now we are not in a position to arrive at more than pro- 

 visional inferences. My own observations have been directed, 

 firstly, to the comparison of the general aspect of the fauna 

 of the surface with that of the bottom ; and secondly, to the 

 comparison of individuals of the several species found under 

 the two conditions, in respect to their shell-structure and 

 similar particulars. 



The list that has just been given includes all the species 

 knoAvn to enjoy a pelagic existence, and of the forms enume- 

 rated two or three of the rarest need not be taken into 

 account. Hastigerina may be dismissed in a word ; it is 



