BY FREDERICK CHAPMAN. 265 



from this rock specimen by breaking up and washing are of very 

 great interest. The following were found : — 



Gaudrijina suhrotvAidata, Sch wager; one specimen. 

 Bolivina nobilis, Hantken; one specimen. 

 Glohlgerina buUoides, d'Orb.; one specimen. 

 Sphcero'idina bulloides, d'Orb.; occasional. 

 Discorbina {V) biconcava, Parker & Jones; one specimen. 



,, bertheloti, d'Orb. sp.; one specimen. 



Truncatulina ungeriana, d'Orb. sp.; one specimen. 

 Carpenteria proteiformis, Goes; one specimen. 

 Miogypsiyia irregularis, Michelotti sp.; frequent. 



„ burdigalensis, Giimbel sp.; several specimens. 



,, comj^lanata, Schlumberger; rare. 



Pulvinidina sp.; one specimen. 

 Amphistegina lessoni, d'Orb.; common. 

 Heterostegina depressa, d'Orb.; frequent. 



,, viargaritata, Schlumb.; common. 



Gycloclypeus p>ustulosus, sp.nov.; common. 

 Lepidocyclina martini^ Schlumb.; very common. 



,, ,, ,, var. rotula, nov.; rare. 



190.— " Stratified sedimentary rocks 25 feet above sea-level, 

 south of Saurii, Santo." 



The two samples of rock, marked A and B, are very dark in 

 colour and resemble in appearance an indurated ash. 



Slide A. —Under the microscope this rock is seen to consist 

 of a tine-grained calcareous mud largely of organic origin, and to 

 a great extent intermixed with fine particles of volcanic pro- 

 ducts, as in No. 178. 



The only recognisable organisms seem to belong to Globigerina 

 budoides, d'Orb. 



Slide B. — A fragmental organic limestone with numerous 

 lava particles and crystals. 



