38S VINE : I'OLYZUA AND MlCllUZOA OF \uRKbllIRE AxND l^ORFOLK. 
1849. Bairdia Harrisiana, Jones. Mouog. Entom. Cret., p. 25. 
1890. J. and H., Monog. Entom. Cret., p. 8, 
pi. ii., figs, 52-55. 
The examples which I place here are like the Cambridge Green- 
sand forms in my possession, " elongate, convex, and narrow," which 
were at first identified by Prof. T. R. Jones as " Argilla^cia ? Harri- 
siana." 
Localities : Chalk : Keady Hill (Derry) ; Gravesend and Charlton 
(Kent) ; Ckdk Rock : Dunstable : Detritus : (Charing) ; lied Chalk 
Hunstanton (Vine); Gree)i><and: Cambridge; Gault : Folkestone 
and Leacon Hill. 
Genus Cytiiereis, Jones, 1849. 
3. Cj^thereis auriculata (Cornuel) (fig. 53, more particularly 
J. and H., pi. i.) 
Cythere auriculata Corn, (part) Mem. Soc. Geol. France. 
1890. Cythereis auriculata J. and H., Monog. Entom. Cret., p. 19, 
pi. i., figs. 56-61. 
Specimens of this particular form have beeu obtained by 
Mr. F. Chapman, from the Gaults of Folkestone (Kent), and God- 
stone (Surrey). Figs. 53 and 64 are typically sub-oblong, broadly 
rimmed and denticulate in front, and bear the two longitudinal 
swellings characteristic of this species." p. 20, op. cit). The unique 
Red Chalk form bears the longitudinal swellings, and speaking gener- 
ally all the other features depicted in fig. 53 on pi. i. 
Localities : Chalk Rock '■ Dunstable ; Red Chalk Hunstanton : 
Gault : Godstone and Folkestone ; Neoconiian : Haute-Marne, 
France. 
4. Cythereis Lonsdaleana Jones. ^Monograph, Cret. Entomos. 
Jones and Hinde, 1890, pi. i , p. 27 for description. 
I have found a single valve of this species wdiich corresponds 
with fig. 64, pi. i., of the above monograph. 
Horizon : Red Chalk, Hunstanton (Top bed). 
Genus Cytherella, Jones, 1849. 
5. Cytherella ovata, Rocmer (Monog. Cret. Eutoni. Jones, 1849). 
