IN THE MUD OF THE LEVANT. 69 



Cruz, contained sand grains, fragments of glassy 

 Felspar, like that from the St. Julian deposit, 

 probably a few sponge spicula, and much calca- 

 reous matter in the form of shelly fragments ; the 

 latter presenting very little visible structure. 

 It dissolved in Nitric acid with much effervescence, 

 containing 40.33 per cent of calcareous matter. 



Specimens from Mocha, Chili, contained a large 

 amount of sand, some glassy Felspar, and 57.61 

 per cent of amorphous lime, but no microscopic 

 organisms. 



Another from Coquimbo, Chili, presented ana- 

 logous appearances, containing 53.79 per cent of 

 calcareous matter, but no visible microscopic 

 organisms. 



Some from Nosidad, Chili, exhibited sand, and 

 perhaps some glassy Felspar ; some shreds and 

 prisms of shell structures, constituted the only 

 calcareous portions, amounting to 1.53 per 

 cent. 



A white calcareous specimen of the old Ter- 

 tiary formation from the west part of the Banda 

 Oriental, contained 56.79 per cent of inorganic 



