76 COLIMACEA. 



Brown, Illust. Conch., p. 50, pi. 17, f. 27, 29, 33, 35, 38, and 

 58 ; lb.. First Ed., pi. 40, f. 27, 29, 33, 35, 38, and 58. 



Shell subpellucid, subglobose ; body large ; spire small, con- 

 sisting of four volutions, the three superior ones but httle 

 elevated above the others, and terminating in an obtuse, de- * 

 pressed apex ; body volution somewhat angulated, or flattened 

 above ; base well rounded, with a narrow and deep umbilicus ; 

 aperture semilunar, somewhat longer than wide; outer lip thin, 

 as well as the pillar lip, which is abruptly reflected half over the 

 umbilicus ; whole surface of a cream-white, or yellowish, with 

 several spiral bands of chestnut, or purplish-brown ; sometimes 

 these are interrupted, forming short, longitudinal, streaks or 

 dots ; base generally provided with one broad concentric band, 

 at a little distance from the umbilicus, but with two in some 

 specimens; near the aperture the colour is more or less roseate; 

 apex defined by a black spiral line. Diameter generally three- 

 quarters of an inch ; length half an inch. But is subject to a 

 considerable difference in size. 



Fig. 14, 15, the young shell. 



A variety of this species is met with quite plain, and in some 

 specimens with only a few faint zones on the body. 



This species bears a considerable similitude to H. virgata, 

 but it is larger and broader, with a more depressed apex. 



This is one of the rarest, and most beautiful of our land 

 shells ; Montagu found it on the south of Tenby, close to the 

 sea shore, and also on the west of that place. The Rev. Thos. 

 Rackett found it at St. Ives, Cornwall, and was first discovered 

 in Ireland, near Balbriggan, on the County of Meath side of 

 the stream that divides that county from Dublin, by my friend 

 M. J. O'Kelly, Esq., of Rochestown House, County of Dubhn ; 

 Thos. Wm. Warren, Esq., of Dubhn, afterwards found it in the 

 same locality. Mr. Humphreys detected it on the north side 

 of the river Boyne, near Drogheda. 



27. Helix ericitorum, pi. VIII, f. 16, 17, 18, 19- 



Helix ericitorum, Miiller, Verm., II, p. 233, No. 236 ; La- 

 marck, An, San. Vert., VI, pt.2nd, p. 84; Montagu, Test. Brit., 

 p. 436 ; Fleming, Edin. Ency., VII, p. 80 ; lb., Brit. An., p. 

 260; Brown, Ency. Brit., 6th Ed., p. 459; lb., Wernerian 

 Mem., II, p. 524; Donovan, Brit. Sh., pi. 151, f. 2; Maton and 

 Rackett, Linn. Tr. VIII, p. 194; Alder, Mag. Zool. and Bot., 



