Foraminiferal Limestones. 235 



Carpenteria, sp. near C. lithothamnica, TJhlig. 



Carpenterla litJwthamnica, TJhlig, 1886, Jahrb. k. k. geol. Eeichsanstalt,. 

 vol. xxxvi, p. 189, pi. V, figs. 1-3. 



A somewhat crushed specimen of Carpenteria occurs in a 

 section of '^o. 924. In some respects it agrees with TJhlig's 

 C. litliotliamnica^ of which he also figures a section (fig. 3, loc. cit.). 

 Our specimen also bears points of resemblance to C. monticularis^ 

 Carter.^ It is in lateral measurement one-eighth of an inch. 



This occurrence of Carpenteria in rocks as old as the Miocene is 

 interesting ; and, until Uhlig's discovery of them in the Tertiary 

 beds of the Carpathians, and Sir John Murray's record of them 

 from the rocks of Malta, ^ they appear to have been unknown as 

 fossils. 



Polytrema miniaceum (Pallas). 



Millepora miniacea, Pallas, 1766, Elenchus Zoopliytoruin, p. 251. 



M. miniacea (Pallas), Linne, 1788, Syst. Nat., ISth (Gmelin's) ed., vol. i, pt. 6, 



p. 3784, No. 6. 

 Folytrema miniacsnm (Linne), Brady, 1884, Eep. Chall., vol. ix, p. 721, pi. 100, 



figs. 0-9 ; pi. 101, fig. 1. 



In oui' section of jSTo. 924 there are several conical foraminiferal 

 organisms, and tapering branchlets which strongly resemble the 

 sections of P. miniaceum seen in recent reef-rocks, and notably 

 those from the Punafuti atoll. The specimens here under notice 

 have a basis of rounded cellules, to which are added superficial 

 layers of chamberlets, elongated in the upward direction of growth. 

 There are apparently no reliable records of this genus from fossil 

 deposits. 



Amphistegina lessonii, d'Orbigny. 



This species is here very rare. 



Seterostegina depressa, d'Orbigny. 

 This form is also very rare in this limestone. 



Orhitoides (^Lepidocyclina) neodispansa, sp. no v. (Pi. XX, Eig. 3.) 



Test discoidal, thicker in the centre and surrounded by a peri- 

 pheral flange. The curve fi'om the centre to the edge makes 

 a more sudden sweep than it does in 0. papyracea and its Miocene 

 analogue 0. verleehi. The surface of the test studded with bosses 

 of solid shell material, which are the salient bases of cones inserted 



' Ann. Mag. Nat. Hist., ssr. iv, vol. xix, 1877, pi. xiii, figs. 9-12. 

 2 Scott. Geogr. Mag., 1890, p. 27 (sep. copy), and pi. i. 



