TN THE MUD OF THE LEVANT. 55 



bear a considerable resemblance to those occurrinsr 

 in many portions of our English Chalk. The most 

 generally diffused are the Rotalinse. Rotalia 

 Beccarii and Truncatulina tuberculata (Nautilus 

 lobatulus, Walker) occur on almost every beach. 

 Cristellarise are found in some localities, and in 

 addition to these, we find forms of Textillaria, 

 Verneueilina, Polystomella, especially P. crispa, 

 Nodosaria, Dentalina, Marginulina, Triloculina, 

 and Quinqueloculina, in various degrees of 

 abundance, many of the recent British forms 

 being identical with those found in a fossil state, 

 Associated with these we have abundance of 

 minute Corallines, Cytherse, sponge spicula, 

 both siliceous and calcareous — spines and frag- 

 ments of Echinoderms, with myriads of young 

 and broken shells. These are not mere local 

 accumulations. The extensive beaches of the 

 Yorkshire coast are mainly of this character, 

 containing from ten to sixteen per cent of calca- 

 reous matter, and I presume that those of other 

 parts of England present similar results. They 

 do so wherever I have had the opportunity of 

 examining them. 



Portions of a similar accumulation at Key West 

 Florida Keys, U.S., sent to me by Dr. Bailey, 



