Mr. H. J. Carter on the Fossil Foraminifera of Scinde. 447 



Kelat (Dr. Cook). Not iu Arabia, so far as my observation 

 extends, although I have no doubt it exists there ; but I 

 mention expressly that I have not seen it in Arabia, to correct 

 an error which I have made in my Memoir on the Geology of 

 the South-east Coast of that countn,- (Geol. Papers, Western 

 India, p. 592 et seq.), in stating that the Umestone at the village 

 of Takah, on this coast, which is charged with OrbitoUtes Man- 

 telli, contained also "Orbitoides Prattii and O. dispansa/' which 

 latter I have since found out to be Heierostegina, whose quadran- 

 gular chambers, while the fossils were yet in the matrix, led me 

 to assume that they were Orbitoides, and thus to make the 

 mistake. 



Associates. — N. exponens and N. biaritzensis at Lukput, in 

 Cutch ; N. Ramondi at Wasna, in Rajpipla ; N. exponens, Assi- 

 lina obesa, N. perforata, Alveolina elUptica, and Conulites Cooki 

 in the valley of Kelat (Dr. Cook) ; the deposit of diminutive 

 Foraminifera, viz. Operculina, N. kelatensis, Alveolina elliptica, 

 A. meandrina, and Orbitolina, also in the valley of Kelat (Dr. 

 Cook). 



Obs. — In my former description of this fossil (Ann. Nat. Hist, 

 p. 173) I went into its stnicture a little, chiefly to contrast the 

 latter with that of OrbitoUtes Mantelli, Cart. {Orbitoides Mantelli, 

 D'Orb.) ; but having since obtained specimens which elucidate 

 this more fully, on account of the whole of the cavities of the 

 test, which formerly contained animal matter, having become 

 richly infiltrated with red and yellow oxide of iron, while the 

 rest remains perfectly free from it, I will now return to the sub- 

 ject more particularly, in doing which I shall not only be able 

 to show much more strikingly how it diffei-s from OrbitoUtes 

 Mantelli, but also be able to point out the position occupied by 

 the sarcode dming the lifetime of the animal, almost as satis- 

 factorily as if I had it living in the test at the present moment. 



Structural description. — ^In structure, Orbitoides dispansa (PI. 

 XVI. fig. 1, &c.) consists of a horizontal jilane of oblong cham- 

 bers (b i), from each side of which proceeds a vertical growth of 

 compressed columnar ones {b 2), 



The horizontal plane, which is more or less wavy, is composed 

 of a single layer of oblong quadrangular chambers arranged in 

 concentric rows around the germ-cell (PI. XVII. fig. lm\,n 1), 

 which is spherical, and may not exceed much its original size or 

 may become very much larger, but always seems to be a little 

 larger than the chambers of the rows which next follow it in 

 development (fig. 1 ni, n) ; it is also hardly ever, perhaps never, 

 without a second cell which very nearly embraces it, and this in 

 the section assumes a more or less semilunar shape {m 2, n 2). 

 To the former, or germ-cell. Dr. Carpenter has (in OrbitoUtes) 



