196 PHYLLOBRANCHIA. TURBONIDZ. 
f. 16; Donov. Brit. Shells, t. xc.; Mont. Test. Brit. 265 ; 
M.& R. Trans. Linn. Soc. vii. 144; Flem. Edinb. Encyel. 
vu. 75; Dill. Desc. Cat. 783; Turt. Conch. Dict. 214. 
sp. 04. 
Helix labiosa, Mont. Test. Brit. 400. t. xiii. f. 7. 
Turbo labiosus, M. § R. Trans. Linn. Soc. viii. 164; Flem. 
Lidinb. Encycl. vii. 76 ; Dill. Desc. Cat. 785 ; Turt. Conch. 
Dict. 203. 
Turbo marginatus, Laskey, Mem. Wern. Soc. 1. t. vi. f. 13. 
(3. testa altiore ; anfractibus nullo modo costatis; peritremate 
tenuissimo. 
Habitat in mari Europzo, /3. in estuariis. Alt. + une. 
The shell white, shining, transparent; its apex purplish, 
with fivewhorls obliquely ribbed; the ribs longitudinally grooved 
and finely striated transversely. Height a quarter of an inch. 
Inhabits the British seas. Var, /3, in estuaries. 
Genus 87. Mreporta. 
Testa crassa, conica, anfractibus quinque. Swtura profunda. 
Apertura rotundata. Peritrema perfectum, crassum, dilata- 
tum. 
Animal incognitum. 
Shell thick, conical, with five whorls. Suture deep. Aper- 
ture rounded. Peritreme perfect, thick and dilated. 
Animal unknown. 
1. Mepor1a WALKERI. 
M. testa opaca, flavido-alba, nonnunquam flavo-brunnea, cre- 
nulata. 
Turbo crassior, Walker, Test. Min. Rar. f. 34; Mont. Test. 
Brit. 309.—Suppl. t. xx. f. 1; M. & R. Trans. Linn. Soc. 
vill. 159; Flem. Edinb. Encycl. vu. 75 ; Dill. Dese. Cat. 
78) 5: Turt..Coneh,: Dict. 198.sp. di. 
Habitat in mari Britannico. 
Shell opake, yellowish-white, sometimes yellowish-brown, 
crenulated. Height half an inch. 
