462 Mr. H, J. Carter on the Fossil Foramlnifera of Scinde. 



0. Mantelli, especially when commencing with a minute cell, 

 rather than typical Cycloclypeus, which, contrary to all the other 

 Foraminif'era, appears to begin in the centre with large chambers, 

 which go on decreasing in size outwards, without first going 

 down to the smaller size of their situation and then increasing 

 again towards the circumfei'ence. But for this, and the cham- 

 bers exchanging their quadrangular for a globular form towards 

 the centre, together with the smallness of the fossil, there is no 

 difference that I can see between the fossil Cyclodypeus of the 

 south-east coast of Arabia and the recent one described by Dr. 

 Carpenter (Phil. Trans. /. c. pi. 30. fig. 1). 



Orbiculina, D'Orb. 



Orbiculina malabarica, Cart. — This fossil, which I had de- 

 scribed under the name of " Orbitolites malabarica " (Ann. Nat. 

 Hist. ser. 2. vol. xi. p. 425), I found afterwards to be an Orbicu- 

 lina, from its resemblance to Orbiculina angulata, Lamk. (Encycl. 

 Method, t. iii. pi. 468. fig. 3), and I therefore made this correc- 

 tion in the fifth volume of the 'Journal of the Bombay Asiatic 

 Society,' p. 634, immediately after which (that is to say, before 

 the sheet in which my correction occurred had passed through 

 the press), I had the pleasure to receive, through Dr. Carpenter's 

 kindness, his second ' Memoir ' on the Foraminifera, in which 

 I found that he had also made the same correction. I mention 

 this chiefly to point out the great resemblance between the figure 

 in the ' Encyclop. Method.' to which I have alluded and Orbicu- 

 lina malabarica. For a description and illustration of the fossil 

 itself, see Ann. Nat. Hist. loc. cit. 



Variety a. 



Largest size. — Breadth -^ inch. 



Loc. Khattyawar, on the coast near Poorbunder, in yellow 

 compact limestone (Capt. Constable, H.M.I.N.). 



Associates. — Fossils of the Middle Tertiary epoch, like those 

 accompanying O. malabarica (typical form). 



Obs. — The only differences between this fossil and the typical 

 form are that the chambers are much smaller in the specimens 

 from Khattyawar ; the structure appears to be finer, and from 

 being in a purer, more compact, and fawn-coloured limestone, 

 which is densely charged with them, they appear, from their 

 light colour and fine structure, to be identical with Orbitolites 

 complanata ; but the distinct spiral arrangement in the centre, 

 which is very evident under even a strong magnifying lens, 

 establishes the difference directly. 



Orbitolites, Lamk. 

 Cychlina pedunculata. Cart. (Ann. Nat. Hist, /. c. p. 176). — 



