GASTEROPODA. PURPURAD. 133 
2. MANGELIA PURPUREA. 
M. testa purpurascente, sutura profunda ; anfractibus decem 
transversim costatis ; costis tuberculatis ; interstitiis elevato- 
lineatis. 
Murex purpureus, Mont. Test. Brit. 260. t. ix. f.3; M. §& R. 
Trans. Linn. Soc. viii. 148; Flem. Edinb. Encycl. vii. 72 ; 
Dill. Dese. Cat. 743; Turt. Conch. Dict. 94. 
Habitat in Danmonie et Cornubice Australis mari profundo. 
Mus. Mont. et Mus. nostr. in Mus. Brit. 
Testa epidermide purpurascente. Peritrema album. Testa 
interne purpurascens. 
Shell with its suture deep, with ten transversely ribbed whorls, 
the ribs tuberculated, the interstices with elevated lines. Height 
six-eighths of an inch. 
Inhabits the deep sea on the southern coasts of Devon and 
Cornwall; is most abundant in the Plymouth Sound. 
3. MANGELIA ELEGANS. 
M. testa fuscescente, nitida, ad apicem purpurea, sutura pro- 
funda ; anfractibus octo transversim costatis ; interstitlis striis 
angustissimis sculptis. 
Murex elegans, Donov. Brit. Shells, t. clxxvi. f. 3; Dill. Desc. 
Cat. 741. 
Murex linearis, Mont. Test. Brit. 260. t. ix. f.4; M. & R. 
Trans. Linn. Soc. viii. 148; Flem. Edinb. Encyel. vii. 71 ; 
Turt. Conch. Dict. 94. 
Habitat in mari Cornubiensi Occidentali, haud infrequens. 
Mus. Mont. et nostr. in Mus. Brit. 
Shell pale fuscous, shining, its apex purple; its suture deep ; 
with eight transversely ribbed whorls, the interstices sculptured 
with very narrow lines. Height half an inch. 
Inhabits the southern coasts of Cornwall; is very rare. 
4. MANGELIA CRANCHIANA. 
M. testa fuscescente, nitida, ad apicem nonnunquam purpurea ; 
sutura tenuiter impressa; anfractibus septem transversim cos- 
