466 Mr. IT. J. Garter on the Fossil Foraminifera of Scinde. 



chambers ; c, flat surface ; d, specimen of largest chambers : all 



magnified. 

 Fig. 5. N. Ramondi, mihi : a, marginal view, nat. size ; b, flat surface ; 



c, spire and chambers ; d, specimen of largest chambers : all 



magnified. 

 Fig. 6. N. kelatensis, n. sp. : a, marginal view, nat. size ; b, flat surface ; 



c, spire and chambers ; d, specimen of largest chambers : all 



magnified. 

 Fig. 7. Conulites Cooki, nov. gen. et sp., lateral view: a, conical surface; 



b, basal surface ; c, vertical section, nat. size ; d, central portion 



of the spire and chambers magnified, as seen on the surface after 



the incrustation of the apex has been removed. 



e, vertical section of half the fossil, showing — 1, incioistation ; 



2, lateral view of chamber-layer ; 3, horizontal layers of cliam- 



bers ; 4, opake white columns of condensed shell-substance, as 



in Orbit oides dispansa. 



f. Basal surface, showing — 1, ends of the columns of white 

 substance ; 2, ends of the columns of chambers ; 3, lines of sepa- 

 ration between the chambers. 



g. Horizontal section, showing — 1, part of the spiral chamber- 

 layer ; 2, truncated ends of opake white columns ; 3, ditto of 

 columns of chambers. 



N.B. d, e, /, g are all diagrams. 



Plate XVI. 



Fig. 1 . Orbitoides dispansa, magnified tvA'ice the size of the specimen. 



a. Portion of surface, magnified, showing — 1, ends of the co- 

 lumns of white condensed shell-substance ; 2, ends of columns 

 of chambers ; 3, lines of separation between the columns of 

 chambers. 



b. Vertical section of entire fossil, the lower part not shaded, 

 showing — 1, the horizontal chamber-layer, and, 2, the radiated 

 arrangement of the columns of chambers and opake white columns 

 of condensed shell-substance. This figure has been more or less 

 proportionally magnified for comparison with the corresponding 

 figure (opposite) of Orbitolites Mantelli, 



c. Portion of surface greatly magnified, showing — 1, ends of 

 the opake white columns, in which are seen points representative 



• of still smaller columns, of which the larger ones are composed ; 

 2, ends of the columns of chambers ; 3, lines of separation 

 between them ; 4, tubular communications between the cham- 

 bers. 



d. Vertical section of part of one of the columns of condensed 

 shell-substance (1) with portions of columns of chambers on 

 each side (2, 2) ; 3, vertical tubuli of the test uniting the 

 chambers. 



e. Horizontal section, still more magnified, showing — 1, column 

 of condensed shell-substance ; 2, chambers laid open ; 3, section 

 through the test, showing the truncated ends of the vertical tu- 

 buli ; 4, tubes of intercommunication between chambers of the 

 same layer ; 5, truncated ends of ditto ascending to the chambers 

 of the next layer, or terminating upon the surface, as the case 

 may be. 



/, Vertical section of columns of chambers, to show the tubes 

 of intercommunication between the chambers passing lip in a 



