PHYLLOBRANCHIA. TURBONID2. 195 
elevated lines, forming a net-work. Colour of the epidermis 
dirty white or pale fuscous. Height one-tenth of an inch. 
This species is not unfrequently found on the coasts of Kent 
and Ireland. 
2. ZACANTHUSA SEMICOSTATA. 
Z. testa anfractibus quinque laté et tenuissimé transversim cos- 
tatis ; epidermide alba. 
Turbo semicostatus, Mont. Test. Brit. 326.—Suppl. t. xxi. 
f.5; M. & R. Trans. Linn. Soc. viii. 162; Flem. Edinb. 
Eneycel. vii. 76; Dill. Desc. Cat. 784; Turt. Conch. Dict. 
201. 
Habitat in mari Danmoniensi, Cornubiensi, et Hibernico Aus- 
trali rarissimé. Alt. 7, unc. 
Shell white, its whorls very slightly transversely ribbed ; 
epidermis white. Height one-sixteenth of an inch. 
_ Inhabits the sea on the southern coasts of Devon and Corn- 
wall; and Seafield, Ireland. 
Genus 86. LAMARCKIA. 
Turbo Auctorum. 
Testa spira acutiuscula. Anfractus superiores plani, basila- 
laris subglobosus. Apertura ovata. Peritrema crassum, re- 
flexum. 
Animal incognitum. 
The shell with its spire rather acute; its superior whorls 
flat, the basal one subglobose ; its aperture oval ; its peritreme 
thick and reflected outwards. 
Its animal is unknown. 
LAMARCKIA COSTATA. 
T. testa alba, nitida, pellucida, apice purpurascente ; anfrac- 
tibus quinque, obliqué costatis ; costis longitudinalitér sul- 
catis et transversim striolatis. 
Buccinum costatum, Da Costa, Brit. Conch. 128. t. viii. f. 4. 
Turbo costatus, Pult. Cat. Dorset. 43. t. xiv. f. 4; 45. t. xviii. 
K 2 
