GASTEROPODA. 19 



and whose strongly expressed opinion was originally the means of directing the attention 

 of the present writer to it. 



AMBERLEYA NODOSA, Tab. XLI, fig. 3; et Part I, PL V, fig. 19, 1850. 



This elegant shell was represented in so defective a manner at Plate V, fig. 19, as to 

 render it desirable to give the present illustration, in which the aperture faces the spectator 

 more directly. The examination of additional specimens has tended to confirm the views 

 expressed in my manuscript of 1850, viz., that Amberleya should rank as a distinct genus 

 of the Littorinid(S, separated from Littorina by the thin test, lengthened, almost turricu- 

 lated, spire, and scarcely less so by the ornamentation of the volutions. Other examples 

 of Amberleya will be found in A. Jurassi, Lye. (the next species here described), Turbo 

 capitanem, Munst., Turbo ornatus, Sow., and some other allied Inferior Oolite species 

 which have been figured by D'Orbigny as examples of Purpwrina, but which are well 

 distinguished from the type form of that genus (see the observations on Purpuroidea 

 insignis). The generic appellation Amberleya was derived from Amberley Heath, which 

 is a second name for Minchinhampton Common. 1 



AMBERLEYA JURASSI, Lye. Part 1, Tab. IX, figs. 33, 33 a. 



Testa turbinato-conicd, acutd, lineatd, anfractibus (6) latis, tricarinatis, carina mediana, 

 magna, subacuta, anfractu ultimo carinis 8, elevatis, subacutis, striis obliquis serratis, aper- 

 tura magna, ovata basi subangulato, columetta recta. 



Shell turbinated or conical ; spire elevated, acute ; volutions (6) high, with three 

 elevated, subacute carinae, of which the median carina is the most prominent. The last 

 volution is large, with eight elevated carinse, their edges being serrated by oblique, longi- 

 tudinal striations ; the aperture is large, ovate, somewhat angulated at the basal junction 

 with the columella, which is straight. 



Distinguished from Turbo capitaneus, Goldf., both by the characters of the general 



1 Subsequently to the completion of this Supplement, I have been favoured by M. Eugene E. 

 Deslongchamps with a copy of his memoir, extracted from the fifth volume of the ' Bulletin of the Linnean 

 Society of Normandy,' 1860, entitled " Observations concernant quelques Gasteropodes, Fossiles, des 

 Terrains Jurassiques places par Vauteur de la ' Paleonlologie Frayaise' duns les genres Purpurina. Trochun 

 et Turbo. Note sur le genre Eucyclus." The latter proposed new genus is identical with our Amberleya, 

 quoted in the memoir as Abberleya. The author has in this little work given an excellent critical analysis of 

 the group of which he has proposed to constitute Eucyclus ; these are Purpurina Patroclus, D'Orb., 

 P. Philiasus, D'Orb., P. ornata, D'Orb., P. bathis, D'Orb., Turbo Itys, D'Orb., T. niceus, D'Orb., T. 

 Julia, D'Orb., T. capitaneus, Munst., T. castor, Eoem., T. princeps, Roem. He has also figured and de- 

 scribed the following new species Eucyclus obeliscus and E. papyraceus, from the Upper Lias ; E. pinauis 

 and E. goniatus, from the Inferior Oolite ; the latter shell, in its general figure and plan of ornamentation 

 has a considerable resemblance to Amberleya nodosa. Eucyclus is therefore a synonym of Amberleya. 



