372 Mr. II. J. Carter on the Fossil Foraminifera of Scinde. 



N. perforata, D'Orb. (D'Archiac and Haime, p. 115, pi. 6). — 

 Globose, or discoidal and compressed, presenting several whorls 

 of white septal lines on the surface more or less crooked, sinuous, 

 branched, and mixed with more or fewer puncta, which may be 

 attached to or separate from the lines, or even present without 

 the lines ; presenting in some instances a branchwork of minute 

 lines radiating from the puncta, and also extending from the 

 septal lines across the cameral spaces. 



Internal structure. — Spire regular, turns approximated towards 

 the circumference in proportion to the sphericity of the specimen. 

 Chambers as long as broad about the centre, becoming much 

 longer in the direction of the spire than across it towards the 

 circumference. 



Largest size. — 1. Globose variety: breadth 1^ T inch (26i mil- 

 ium) ; thickness T 9 ^ inch (19^ millim.). 2. Compressed variety : 

 breadth \% h inch (2H millim.); thickness f| inch (10 millim.). 

 3. Thin variety: breadth T V inch (15 millim.); thickness 

 f,| inch (5^ millim.). 



Loc. Upper Scinde (Col. Turner) ; Valley of Kelat (Dr. Cook). 



Associates. — Assilina exponens (var. b), A. obesa, N. spira, 

 N. biaritzensis, Alveolina elliptica, Orbituides dispansa, Conulites 

 Cooki, at Kelat ; N. Carteri and N. spira in Upper Scinde. 



Obs. — As this Nummulite has all the forms (viz. globose and 

 flat) of N. perforata, and at one time the same external markings 

 while at others not, which, as before stated, makes the latter of 

 little specific value, while it resembles it also in the shape of its 

 chambers, their increase in diameter in the direction of the spire, 

 and the increase in number and approximation of the turns of the 

 spire towards the circumference, more especially in the globose 

 forms, I think we must set down this fossil as N.perforata. There 

 is so little difference, however, between some of the natter forms 

 and N. Brongniarti, N. Verneuili, and N. Sismondai (D'Archiac 

 and Haime), that it might occasionally be taken for either of 

 them. 



MM. d'Archiac and Haime also state (p. 117), regarding N. 

 perforata : " Les nombreux individus que nous avons observes 

 qui provenaient tons d'une meme localite, presentaient a, l'exte- 

 rieur un teinte violette, beaucoup plus faible en dedans. C'est, 

 d'ailleurs, le seul exemple de coloration que nous avons observe 

 dans les Nummulitcs, et qui puisse etre regarde comme ne 

 provenant pas d'une circonstance etrangere." This happens to 

 be the case, so far as regards the colour, with most of the Punc- 

 tulatte which Dr. Cook sent from the Valley of Kelat (a great 

 number), but it is not confined to them; for the other Forami- 

 nifera, viz. Assilina obesa, n. sp., and Orbitoides dispansa, which 

 are associated with them are in like manner and equally violet- 



