iX()ri-:u.\:\irs. 



323 



Micra.'iter ciir-auijiiliunii) ; in the Ui'iti.-li Afuscuiii, Xo. I/JSUJ. This siieciineii was 

 first I'ccogiiiscd as the original of Parkinson's figure hv Mr. (". D. Sherboni. 



/ 



,^' 



/ 



Fio. SJ.— //locfi-rtiiiKs LoDuiixli Viir. C'«i-i«M-i, Sow. Chalk; Imwlity ami horizon unknown. BritUli Museum, 



No. LaSiW'J. Kijjlit valve, x {. 



]. .C'li fieri, Sowerliy (Fig. 7o), from the Mi(hlK> Chalk of Royston (zone of 

 Terchratnliaa lata); in thi" British Museum, Xo. 4o:2(Jl-. 



/. Lumarrhi, >faiite]l (Fig. 00), from the ^Middle Clialk near Lewes (probably 

 from dialling, zone of TvrcbmiaUna lata) ; in tlie British Museum, Xo. 47-Jo. 



