GASTEROPODA. PURPURADZ. 119 
The exterior integument is most generally slit at its extre- 
mity ; the interior integument is furnished at its extremity 
with two lips which are most generally armed with spines. 
Tongue is spinulose. 
STIRPS I. 
Genus 57. ACTON. 
Actzeon, De Montford, Cuvier. 
Tornitelle, Lamarck. 
Testa elliptica, conico-spiralis. Apertura ad dextram gra- 
datim angustata ; ad sinistram uniplicata. Peritrema posticé 
inchoatum. Umbilicus perforatus. 
Shell elliptical, conically spiral. Aperture gradually nar- 
rowed to the right, with one fold on the left. Peritreme com- 
menced behind. Umbilicus perforate. 
Of this genus I have seen contracted specimens of the animal, 
preserved in spirits ; by which I have been enabled merely to 
ascertain that it belongs to this order of Gasteropoda, and not 
to the Saccobranchia, to which it was referred by my learned 
friend, the Baron Cuvier, who had never seen the inhabitant. 
Through the medium of the exotic genera, Oliva, Voluta, 
Cancellaria, &c. it is connected with Buccinum, Murez, $e. 
and belongs evidently to the family Purpurade. 
1. ACTZON TORNATILIS. 
A. testa rosacea, anfractibus longitudinaliter sulculatis, vittis 2 
albis notatis : superioribus abrupté angustatis, planis. 
Voluta tornatilis, Zinn. Syst. Nat. 1.1187; Penn. Brit. Zool. 
iv. 117. t. 71. fig. 86; Gmel. Syst. Nat. i. 3437 ; Mont. 
Test. Brit. i. 231; M. & R. Trans. Linn. Soc. vii. 189 ; 
Flem. Edinb. Encycl. vi. 83; Dill. Desc. Cat. 503; Turt. 
Conch. Dict. 249. 
Voluta bifasciata, Gmel. Syst. Nat. 1. 3436. 
Acteon tornatilis, De Mont. Conch. Syst. ii. 315 ; Cuv. Réegne 
Anim. ii. 414. 
Habitat in littoribus arenosis, et in mari profundo, frequens. 
