with Observations on their Internal Structure. 171 



is made into strings of beads for Hindu pUgrims and others of the 

 Hindu faith. They are said to be prepared for this purpose by 

 being repeatedly struck with a hammer, untU the external layers 

 peeling off leave a smooth surface. 



3. Fascicolites elliptica, Parkinson (fig. 17). 

 Loc. Scinde. 



Obs. This also has the same characters as the foregoing specieSj 

 but is much elongated, almost cylindrical. Length 7-24ths of 

 an inch ; breadth 3-24ths. It abounds about Hydrabad, and 

 near the Buran river, in company with a discal Orbitolite to be 

 hereafter described. 



There is nothing to distinguish these species one from another 

 but their spherical, spheroidal and elliptical forms respectively. 

 The two latter appear to have their peculiar localities in Scinde, 

 and to be sparingly mixed together. On the south-east coast of 

 Arabia, where they are also found in company with discal Orbi- 

 tolites, the spheroidal form is most common. D'Orbigny has 

 made this the last genus of his second section of nautiloid Fora- 

 minifera, but I have inserted their description here, to show the 

 transition from the flat to the elongated forms of his Helico- 

 stegues. 



Let us now return to the descriptions of the other Nummulites ; 

 which will be found to differ from the foregoing in the absence 

 of the sinuous lines on the surface and in the presence of the 

 reticulated structure mentioned. 



4. Nummularia acuta?, Sovferhy. Equilateral, discoidal, wavy ; 

 centre rather abruptly prominent, margin thin, acute; surface 

 presenting a subgranular, reticulated structure, the interstices of 

 which tend to a spiral arrangement towards the circumference. 

 Internally consisting of a thin central plane of chambers arranged 

 in a spiral form, with layers of compressed ones above and below 

 it. Whorls numerous. Chambers three times as long as the 

 whorl is broad. Septa straight or but slightly reflected ; each 

 chamber divided into three or more reticulate divisions by sub- 

 septa, which structure, extending from the circumference to the 

 central prominence, gives the surface the reticulated appearance 

 mentioned ; each interstice corresponding to a compressed cell, 

 which is the external extremity of a columnar pile extending 

 down, more or less regularly, to the central plane. Diameter of 

 largest specimens 7-12ths of an inch ; thickness in the centre 

 3-lOths (figs. 21, 22). 



Loc. Scinde. 



Obs. This appears to be N. acuta, Sowerby (Grant's Geol. 

 Cutch, loc. cit.), from its subgranular surface, size and shape. I 

 do not know any other species like it in Scinde, if this be not the 



