78 COLIMACEA. 



disjuncta, Turton, Conch. Diet., p. 61, f. 63; Helix ericito- 

 rum, Brown, Illust. Conch., p. 50, pi. 17, f. 28. 



This remarkable lusus, pi. VIII, f. 19, was found near 

 Golden Bridge, Dublin, by Mr. Edward Stephens, and is in the 

 cabinet of my old and respected friend M. J. O'Kelly, Esq., of 

 Rochestown House, County of Dublin, where I again saw it in 

 August, 1841. 



The H. ericitorum is a widely diflFused species throughout 

 the South of England and the Isle of Man, and appears to 

 abound all over Ireland and its adjacent islands. A favourite 

 resort seems to be the marine sand banks around the coast, and 

 is also common in many inland situations. Mr. Thompson 

 mentions having found a specimen nine lines in circumference 

 at Portarlington, where I likewise met with large and beautiful 

 specimens. Thompson also adds, "As an exception to the 

 more ordinary places of its occurrence, may be mentioned the 

 ruins of Dunluce Castle, situated on the summit of an insu- 

 lated mass of rocks, considerably elevated above the sea." 



Sub-Genus 6. — Verticillatje. — Ferussac. 

 Shells striated, and varied in colour. 



28. Helix rotundata, pi. VIII, f. 20, 21, 22, 23, 24. 



Helix rotundata, Miiller, Verm., II, p. 29, No. 231 ; Dra- 

 pernaud, p. 114, pi. 8, f. 4 ; Brard, p. 51, pi. 2, f. 10, 11; 

 Pfeiffer, I, p. 44, pi. 2, f. 33, 34 ; Rossmassler, VII, p. 13, pi. 

 32, f. 454; Fleming, Brit. An., p. 263; Alder, Mag. Zool. and 

 Bot., II, p. 109; JeflFreys, Linn. Tr., XIII, p. 342; Forbes, 

 Mai. Mon., p. 8 ; Thompson, Ann. and Mag. Nat. Hist., VI, p. 

 30 ; Helix radiata, Montagu, Test. Brit., p. 432, pi. 24, f. 3 ; 

 Da Costa, Brit. Conch., p. 57, pi. 4, f. 15, 16; Brown, Wer- 

 nerian Mem., II, p. 525 ; Fleming, Edin. Ency., VII, p. 80 ; 

 Maton and Rackett, Linn. Tr., VIII, p. 199; Turton, Man., p. 

 59; Zonites radiatus, Leach, Moll., p. 102; Helix rotundata, 

 Brown, Illust. Conch., p. 51, pi. 17, f. 14, 18, 19, 20, and 24; 

 lb., First Ed., pi. 40, f. 14, 18, 19, 20, and 24. 



Variety 1. Spire depressed. 



Helix Turtoni, Fleming, Brit. An., p. 260 ; Helix albella, 

 Nilsson, p. 30. 



