LIST OF WOOD ENGRAVINGS. 



Fig. tage 



I. Coccospheres and Coccolitlis . . . . . .47 



II. Composite coccospheres with attached coccoliths .... 18 



ID. Diagram of Artieidinc Vertebralina . . . . . -1-9 



IV. Diagram of a Frondicularian Nodosaria . . . . .49 



V. Diagram of the chambered structure of Orb'itolina . . . .50 



VI. Diagram of the chambered structivre of Orbitoides . . . .50 



VII. Diagrammatic section of simple NautUoid shell . . . .50 



VIII. Diagrammatic section of Operculina . . . . .50 



IX. Vertical sections of six specimens of Operculina . . . .57 



X. Vertical sections of three outer convolutions of Operculina . . .58 



XI. Lateral view of Nautiloid shell, with investing convolutions . . .58 



XII. Front view of Nautiloid shell, with non-investing convolutions . . .59 



XIII. Front view of Nautiloid shell, with investing convolutions . . .59 



XrV. Diagram of Animal of Miliola . . . . ■ .77 



XV. Ideal transverse sections of Spiroloculina . . . . .77 



XVI. Ideal transverse sections of Biloculina . . . . .78 



XVII. Ideal transverse sections of Qiiincjueloculina . . . . .78 



XVIII. Ideal transverse sections of TrilocuUna . . . . . 7fj 



XIX. Section of Peneroplis through the median plane . . . .80 



XX. Front views of four- specimens of Peneroplis . . . . .89 



XXI. Septal planes and apertures from difterent parts oi' the same specimen oi Dendritina . 90 

 XXII. Simple type of Alveolina, laid open ..... 100 



XXIII. Portion of internal cast of complex type of Alveolina . . . .102 



XXIV. Interior of simple type of Orbitolites . . ■ ■ .108 

 XXV. Diagram of Dactylopora eruca ...... 128 



XXVI. Diagram of Dactylopora annulus . . . . ... 129 



XXVII. Diagram of Dactylopora digitata . . . . ... 1 '■") 



