GASTEROPODA. PURPURADZ. 131 
Inhabits the British Seas ; is not unfrequently found in deep 
water off the coasts of Devon, Cornwall, Wales, Ireland, and 
in Scotland only in the Frith of Forth. 
2. Fusus asperrimus. Pl. X. fig. 3. 
F’. testa anfractibus longitudinaliter elevato-lineatis et transver- 
sim costatis ; costis tuberculatis. Color niveus. 
Fusus asperimus, Prideaux, MSS. 
Habitat in Danmonie Australis mari profundo rarissimé. 
Shell with its whorls sculptured with longitudinally elevated 
lines and transversely costated, the ribs tuberculated. Colour 
snowy white. 
This very rare and interesting species was discovered by my 
cousin, C. Prideaux, Esq., in the Plymouth Sound. I am in- 
debted to him for the specimen figured in this Plate. 
Genus 63. MANGELIA. 
Murex et Buccinum Auctorum. 
Testa acuminata, acuté spiralis. Siphon brevis. Peritreima 
posticé conforme, obtusiusculum. Apertura ad dextram obtu- 
siuscula, posticé sinuato-emarginata. Animal incognitum. 
Shell acuminated, acutely spiral, its siphon short; its pe- 
ritreme conformable behind; its aperture rather obtuse, on 
its right side posteriorly notched. Animal unknown. 
Synopsis Specierum. 
1. gracilis. Testa flavescente alba nitida, fascia rubra spirali 
picta, sutura profunda ; anfractibus decem transversim cos- 
tatis ; interstitiis spiraliter et profundé impresso-lineatis. 
2. purpurea. Testa purpurea, sutura profunda; anfractibus de- 
cem transversim costatis; costis tuberculatis ; interstitiis 
elevato-lineatis. 
3. elegans. Testa fuscescente nitida, ad apicem purpurea ; sutu- 
ra profunda ; anfractibus octo transversim costatis ; inter- 
stitils striis angustissimis sculptis. 
