EXPLANATION OF THE PLATES AND WOOD-CUTS. 



The short spire of 5 whorls gives this shell a very blunt aspect. 



Loc. Baboa Hill. 

 Fig. II. Turbinellus bulbiformis. Short-fusiform, smooth ; spire pointed; whorls 6, 

 flattened in the middle ; aperture narrow, pointed at both ends. Height above 7 

 inches, diameter 5 inches. Reduced to half its size in the figure. 



Resembles T. Napus, but has a more elongated spire. 



Loc. Wage-ke-pudda. 

 Fig. 12. Cyprcea depressa. Obovate, with a blunt spire and a flattened space across 

 the middle of the back. Length 3^ inches, width 2 inches 7 lines. Drawn one 

 half its size. 



This being only a cast, we can give but a very imperfect description. 



Loc. Baboa Hill. 

 Fig. 13, 13 «. Ntimmiilaria acuta. Depressed, sides conical, decreasing in proportional 

 height by age ; when young radiated, when full-grown granulated ; volutions and 

 septa numerous ; edge sharp. Diameter 5 Hnes, thickness \~ line. 



Distinguished from most other species of Nummularia by the conical form of 

 the sides. Fig. 13 a. is a vertical section magnified. 



Loc. Luckput. 

 Fig. 14, 14 a. 'Nummularia ohtusa. Irregularly orbicular, thick, smooth, sides flat- 

 tened ; margin rounded ; volutions and septa very numerous. Diameter of the 

 largest individual 10 lines, thickness nearly five lines. Fig. 14 a. is part of a vertical 

 section magnified. A remarkably thick species. 



Loc. Wage-ke-pudda. 

 Fig. 15, 15 a. & 15 b. Lycophris Ephippium. Orbicular, depressed, curved so as to 

 resemble a saddle, with a gently elevated umbo on each side ; margin thick, obtuse, 

 with a narrow waved keel in the middle ; grains on the surface small and equal. 

 Diameter 1^ inch, thickness 3 lines. 



Fig. 15. A full-grown individual, showing by a break that it is composed of two 

 plates; fig. 15 a. a portion of the surface magnified; fig. 15 b. a portion of a ver- 

 tical fractured section, and the inner surface of one of the plates magnified. 

 Fig. 16, 16 a. 16 b. Lycophris dispansus. Lenticular, thick, with a very thin, ex- 

 panded, sharp-edged margin ; grains on the surface largest in the centre of the 

 disk. Diameter i an inch. 



Fig. 16. A group, natural size ; fig. 16 a. vertical section magnified ; fig. 16 i. a 

 horizontal section magnified. 



These two fossils may possibly be different stages of growth of the same species ; 

 for there occur along with them many curved plates which are intermediate in form. 

 The grains on the surface are the projecting extremities of internal columns, not 

 merely granulations in the substance of the fossil, as in some species of Nummularia. 

 The internal structure is totally diflferent from that of Nummularia, as it is only on 

 the inner surfaces of the two plates (fig. 15 b.) that any appearance of a spiral or con- 

 centric series of cells can be traced. In p. 300 these fossils are assigned to the 

 genus Orbitolites. 



Loc. Both species very abundant at Baboa Hill and Wage-ke-pudda. 



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