172 



DEPTHS OF THE OCEAN 



Distribution 

 calcareous 

 remains in 

 pelagic 

 deposits. 



Pelagic 

 species of 

 foraminifera. 



of distribution of calcium carbonate organisms, that they are most 

 abundant both at the surface and at the bottom in warm tropical 

 regions where the annual range of surface temperature is least. 

 In the tropics the following genera and species of foraminifera 

 are known to have a pelagic habitat, three or four of the species 

 being rather doubtful : — 



Globigeruia sacculifera, Brady. 



aqicilateralis^ Brady. 

 conglobaia, Brady. 

 dubia^ Egger. 

 rubra, d'Orbigny. 

 bulloides, d'Orbigny. 

 i/ijlata, d'Orbigny. 

 digitata, Brady. 

 cretacea, d'Orbigny. 

 dutertrei, Brady. 

 i>achyderfna (Ehrenberg). 

 marginata (Reuss). 

 linncBa?ia (d'Orbigny). 

 helicina, d'Orbigny. 



Orbulina universa, d'Orbigny. 

 Hastigerina pelagica (d'Orbigny). 

 Pullenia obliquiloculata, Parker and 



Jones. 

 Sphceroidina dehiscens, Parker and Jones. 

 Candeina fiitida, d'Orbigny. 

 Cymbalopora ( Tretomphalus) bulloides 



(d'Orbigny). 

 Fulvmidina ?nenardii (d'Orbigny). 



,, tiimida, Brady. 



„ canariensis (d'Orbigny). 



„ michelmiana (d'Orbigny). 



„ crassa (d'Orbigny). 



„ patagotiica (d'Orbigny). 



The following genera and species of shelled pteropods and 

 heteropods are pelagic : — 



Pteropods 



Pelagic species Limacina inflata (d'Orbigny). 

 of pteropods. ,, triacaiitha {Y\?,z\vQx). 



helicitia (Phipps). 

 antarctica, ^Voodward. 

 helicoides, Jeffreys. 

 lesueuri (d'Orbigny). 

 australis (Eydoux and Soule- 



yet). 

 retroversa (Fleming). 

 trochiformis (d'Orbigny). 

 bulinioides (d'Orbigny). 

 Peradis reticulata (d'Orbigny). 



„ bispinosa, Pelseneer. 

 Clio {C resets) virgida (Rang). 

 „ ,, cotnca (Eschscholtz). 



„ ,, adcula (Rang). 



„ ,, duerchice (Boas). 



,, {Hyalocylix) striata (Rang). 



Clio {Styliola) siibida (Quoy and 

 Gaimard). 

 ,, andrece (Boas). 

 „ polita (Craven). 

 ,, balantiimt (Rang). 

 ,, chaptali (Souleyet). 

 ,, ai/stralis (d'Orbigny). 

 „ sidcata (Pfeffer). 

 ,, pyramidata, Linne. 

 ,, cuspidata (Bosc). 

 Ciivieri?ia colu7nneUa (Rang). 

 Cavolinia trispinosa (Lesueur). 

 ,, qicadridentata (Lesueur). 

 ,, longirostris (Lesueur). 



„ globidosa (Rang). 

 ,, gibbosa (Rang). 

 ,, tride/data (Forsk^l). 



,, iindnata (Rang). 



„ i/iflexa (Lesueur). 



Heteropods 



Pelagic species Carinaria cristata (Linne). 



of heteropods. ^^ fragilis, St. Vincent. 



,, /a??iardiii, Peron and Lesueur. 



Carinaria depressa, Rang. 



,, australis, Quoy and Gaimard. 



,, galea, Benson. 



