LYMN^CEA. 11 



This species is subject to variety, both in size and form, as 

 will be seen by a reference to our figures; in some the spire 

 terminates in a decollated apex. It also varies in the number 

 of its volutions. 



Section II. — Subovate ; body ventricose ; aperture longer 

 than the spire. 



5. LVMNiEA AURICULARIA, pi. II, f. 11, 12, 13, 14. 



Lymncsa auricularia, Lamarck, An. San. Vert., VI, pt. 2nd, 

 p. 161 ; Brown, Illust. Conch., p. 29, pi. 15, f. 29, 30, 31, 32 ; 

 Lymneus atcricularis, Brard, p. 140, pi. 5, f. 2; Turton, Man., 

 p. 117j f- 100; Limnceus auricularis, Pfeifter, p. 85, pi. 4, f. 

 17} 18; Limneus atmcularis, Drapernaud, p. 49, pi. 2, f. 28, 

 29, and 32 ; Rossmassler, Icon., I, p. 98, pi. 2, f. 55 ; Jeffreys, 

 Linn. Tr., XVI, p. 372 ; Alder, Mag. Zool. and Bot., II, p. 

 115 ; Thompson, Ann. and Mag. Nat. Hist., VI, p. 29; Helix 

 auricularia, Linnajus, Syst. Nat., p. 1250; Pennant, Brit. Zool., 

 IV, p. 138; Donovan, Brit. Sh., pi. 51, f. 1 ; Montagu, Test. 

 Brit., p. 375, pi. 16, f. 2, and p. 381, pi. 16, f. 1 ; Helix limosa, 

 Fleming, Brit. An., p. 275 ; BroN\n, Wernerian Mem., II, p. 

 531 ; lb., Ency. Brit., VI, p. 461 ; Radix auricidatus, De Mont- 

 fort, II, p. 207; Gulnaria auricularia, Leach, Moll., p. 148; 

 Buccinuin auricula, Miiller, Verm., II, p. 126. 



Shell slightly ovate, thin, brittle, subpellucid, of a pale yel- 

 lowish horn colour ; body very large, ventricose, and slightly 

 wrinkled longitudinally ; spire very short, consisting of three 

 or four well defined volutions, terminating in an acute apex; 

 aperture oblong-ovate, extremely wide, and large ; outer lip 

 greatly extended, and somewhat refiected at the margin ; 

 pillar lip smooth, broadly reflected on the columella, with a 

 strong fold towards its lower part, and forming a slight umbili- 

 cus behind. 



Found in the river Avon, the Kennet, Berkshire ; and In a 

 ditch at Clonooney, King's County, Ireland. 



6. LVMNiEA PEREGRA, pi. II, f. 15, 16, 1 7, 18, 19, 20, 21 , 



22, 23. 



Limnaa percgra, Lamarck, An. San. Vert., VI, pt. 2i»d, p. 

 161 ; Limneeus pereger, Pfeiffer, p. 90, pi. 4, f. 23, 24; Brown, 

 Illust. Conch., p. 29, pi. 15, f. 8, 9, 10, 11, 36, 38, 39, 40'; 

 Limneus pereger, Drapernaud, p. 50, pi. 2, f. 34 and 37 ; 



