174 Mr. H. J. Carter on Fossil Foraminifera in Scinde, 



2. Lycophris ephippium, Sowei'by {he. cit.). 

 hoc. Cutch. 



Ohs. Of this fossil Mr. Sowerby states : "These two fossils 

 [Lycophris dispansus and L. ephippium'] may possibly be different 

 stages of growth of the same species/' which seems to me very 

 probable. 



3. Orbitoides Prattii. 



Lac. Scinde, Cutch, Arabia. 



Obs. I have just stated the reasons which induce me to think 

 that this is merely a variety of Lycophris dispansus. 



Orbitolites, D'Orbigny. 



1. Orbitolites Mantelli (H. J. C). Nummulites Mantelli, 

 Morton (Quart. Journ. Geol. Soc. vol. iv. p. 12). Orbitoides 

 Mantelli, D'Orbigny {ib.). Discoidal, wavy, equilateral or in- 

 equilateral ; centre abruptly prominent on one or both sides, mar- 

 gin more or less expanded, very thin, plane or wavy, more or 

 less obtuse at the edge ; surface smooth, subgi'anular or tuber- 

 culated, especially over the prominent portions of the centre; 

 tubercles minute, round, irregular in size and shape. Internally 

 presenting a central plane, thin at the centre, thick at the cir- 

 cumference, composed of spheroidal or elongated cells, small in 

 the centre, large at the circumference, placed in rows which 

 appear to have a concentric arrangement, but this is indetermi- 

 nable ; cells alternate in adjoining rows. Compressed chambers 

 above and below the central plane, arranged in successive layers 

 like those of Orbitoides and Nummulites ; more or less over each 

 other, so as to form columns which radiate from the central plane 

 to the periphery, where they end in the granulations or tuber- 

 cles mentioned. Diameter of largest specimens half an inch 

 (figs. 30-31). 



Figs. 32, 33, 34, appear to be merely varieties in form of the 

 same species. 



Loc. Scinde, Arabia. 



Obs. This fossil, though at first sight almost identical with 

 Orbitoides, is nevertheless on minute examination strikingly dif- 

 ferent. 1st. It is for the most part inequilateral, which at least 

 is the opposite with Ljcophris dispansus; its surface also is 

 smoother from the granulations being more minute. 2nd. The 

 central plane is thin in the centre and thick at the circum- 

 ference ; in Orbitoides it is extremely and uniformly thin through- 

 out. 3rd. It is composed of a plurality of layers of spheroidal or 

 elongated cells (figs. 36, 37) ; in Orbitoides it consists of a single 

 layer of quadrangular cells (fig. 27). 4th. The cells are very 



