INDEX TO PART IF. 
OF THE 
PHILOSOPHICAL TRANSACTIONS 
FOR THE YEAR 1883. 
B. 
Bdellostoma, 394 (see Parker) . 
C. 
Calamites, 465. 
Carpenter (W. B.). Researches on the Foraminifera—Supplemental Memoir. On an Abyssal type of 
the Genus Orbitolites;—a Study in the Theory of Descent, 551.—Orbitolites tenuissima, 553; 
geographical, bathymetrical, and geological distribution, 558; relation to other Orbitoline types, 
559; evolutionary history of the Orbitoline type, 567; theory of descent, 569; explanation of 
plates, 571. 
Goal-Measures, fossil plants of, 459 (see Williamson). 
Compass, change in the deviations of, on a change of magnetic latitude, 615. 
Creak (E. W.). On the Changes which take place in the Deviations of the Standard Compass in the 
Iron Armour-plated, Iron, and Composite-built Ships of the Royal Navy, on a considerable change 
of Magnetic Latitude, 615.—General conclusions, 625. 
Croonian Lecture (see Martin). 
