54 



MARINE BOTTOM SAMPLES OF LAST CRUISE OF CARNEGIE 



Table 5. Species of foraminifera identified in 



The symbols for abundance (A, VC, C, and R) have different meanings for pelagic and benthonic species: 

 For pelagic species, A =more than 10 to 15 per cent of coarser sand grades; VC = 5 to 15 per cent; C = 1 to 5 per 

 cent; R= <1 percent. For benthonic species, these letters refer to number of individuals seen, e.g.: A = 

 more than 10 individuals; VC =5 to 10; C =2 to 5; R = l or 2. 



Table 6. Sponge fragments in the samples 



Sample 



Station 



14 25 27 29 31 34 35 49 59 72 79 81 82 



Class Hexactinellida 



Order Hexasterophoraa 



Fragments, normal dictyonine mesh 

 Fragments, dictyonine mesh with 



clavate prolusions 

 Normal spicules 

 Typical oxeasters 

 Rhabds, more or less acanthose 

 Class Demospongia 

 Order Choristida 

 Spicule types: b 

 Oxea 



Rhabds, possibly oxeate 

 Protrlaene 

 Anatriaene 

 Dichotrlaene 



Asters (not quite typical because 

 somewhat flattened) 



X .. x 



.... X ..XX 



.. X 



..X ..X 



X X X .. X X X 



* Besides these fragments, which are definitely from sponges, there are also fragments which may 

 be parts of radiolarian skeletons. ''All these spicules could be from the same species and any one of 

 them could have been from any species of the entire order. It is impossible even to assign families. 

 Besides these known spicules there are certain structures in sample 79 which may be chemical in origin 

 or from some other phylum, but which, if sponge, must be the so-called spherasters, characteristic of 

 the family Geodiidae. 



