A. J. Jukes-Brou-ne — Ttvo Stages in Up23er Chalk. 361 



Prom this table it will be seen that there are two different 

 Eehinoderm faunas in Germany, just as there are two different 

 Cephalopodan faunas, only two species passing from the lower three 

 to the two highest zones. Thei'e is not, however, such a clearly 

 marked line of separation; tlie fauna of the S. linodosus zone seems 

 from the tabulated species to be linked as closely with the higher as 

 Avith the lower zones, for it contains sixteen species, of which number 

 ten appear to be restricted to the zone and three range both up 

 and down, while one passes downward only and two range upward. 

 This result, however, is deceptive, because the Emscher is so poor 

 in Echinoderms that only six species have been recorded from it, and 

 only eight have been found in the Marsupites zone. If these zones 

 were as productive in Germany as they are in England and Erance it 



