458 Mr. H. J. Carter on the Fossil Foraminifera of Scinde^ 



Largest 'size. — Breadth at base -~ inch; height of cone 

 flinch. 



Loc. Scinde, locality unknown. Valley of Kclat (Dr. Cook). 



Associates. — N. eocponens (var. b), Assilina ohesa, N.jicrfurata, 

 N. hiaritzensis, N. spira, Alveolina elliptica, and Orhitoides dis- 

 pansa in the Valley of Kelat; N. Carteri and N. spira in 

 Scinde. 



Obs. — I first recognized this fossil amongst some Nummulites 

 sent from Kelat by Dr. Cook^ and then in the mass in some 

 specimens from Scinde previously in my possession. The spire 

 is generally single throughout, but sometimes bifurcated so as 

 to become double ; and the same with the septal lines, which 

 have a radiating spiral tendency from the apex towards the cir- 

 cumference; while the columnar structure, in respect of the- 

 chambers and columns, is almost identical with that of Orbitoides 

 dispansa. As yet, I have met with no specimens sufficiently 

 infiltrated with yellow oxide of iron to enable me to follow out 

 the internal structure minutely. This fossil is very like the 

 conical forms of Orbitolina, but differs in the cortical layer con- 

 sisting of a spire instead of concentric rings of chambers, and in 

 the columnar structure being accompanied by the white opake 

 columns. Thus Conulites belongs to the " Helicostegues " of 

 D'Orbigny. 



Orbitolina, D^Orb. 



1. Orbitolina lenticularis, Lamk. (PI. XVII. fig. 5, &c.). — Coni- 

 cal, obtuse, slightly excavated or patulous; margin everted, 

 external surface presenting concentric rings; patulous surface 

 presenting granulations, which are more or less confused in the 

 centre, but arranged in radiating lines towards the circumference. 



Size. — Breadth -~ inch ; height ^ inch. 



Variety a. Conical, acute, deeply excavated. 



Size. — Breadth ^ inch; height ^ inch. 



Variety b. Flat, circular, wavy, thick ; thinning towards the 

 circumference. 



Size. — Breadth -^ inch ; height -^ inch. 



Variety c (fig. 6). Discoidal, almost flat, very thin, papyra- 

 ceous. 



Size. — Breadth -f^ inch ; thickness -^ inch. 



Loc. All from the south-east coast of Arabia, at Has Fartak, 

 with fossils of the Cretacean age. 



Obs. — These Foraminifera I first described under the name of 

 " Orbitolites" in my " Memoir on the Geology of the South-east 

 Coast of Arabia" (Journ. Bombay Asiat. Soc. vol. iv. p. 71), 

 and then again under that of " Orbitolina patula" (Geol. Papers 

 Western India, pp* 549 & 603), since which I find that the 



