180 PHYLLOBRANCHIA. TURBONID. 
taculis conico-acuminatis, elongatis, ad apices obtusis, ad 
basin gradatim dilatatis, oculigeris. Pede ultra oculos anticé 
producto, obtusé rotundato. Oculis convexis, rotundatis. 
Shell spiral, gibbous, flat beneath. Aperture semi-orbicular. 
Peritreme flat. 
Animal: Mouth rostrated, moderately elongated, cylindri- 
cal. Tentacles elongated, conically acuminated, their points 
obtuse, their bases gradually dilated, and bearing the eyes. 
The foot produced beyond the eyes and obtusely rounded. 
Eyes convex and round. 
NERITA LITTORALIS. 
N. testa glabra, colore valdé variabili. 
Nerita littoralis, Zinn. Faun. Su. 2195; Syst. Nat. 1253. 724; - 
Gmel. Syst. Nat. 3677; List. Anim. Angl. t. ui. f. 11, 12, 
13; Conch. 607. f. 39, 42 ;- Petiv. Gaz. xxxiv. f. 4, 5, 6; 
Gualt. Test. t. x. £. L, L; Da’ Costa, Brit. Conch] oe 
t. m.f. 13, 14, 15, 16, and't. m. f. 2, 3.; Chem. Cane 
t. clxxxv. f. 3; Donov. Brit. Shells, t. xx. f. 2; Mont. 
Test. Brit. i. 467; M. & R. Trans. Linn. Soc. vii. 226 ; 
Flem. Edinb. Encycl. vin.; Dill. Desc. Cat. 186; Turt. 
Conch. Dict. 126. sp. 6. 
Turbo neritoides, Pult. Cat. Dorset. 44. t. xvi. f. 13, 14, 15, 
iG. aud toxxe 7.1L, 2. . 
Habitat in maris Europe littoribus vulgatissime. Alt. 4 
une. 
Teste color brunneo-niger ; sordidé flavidus; niger; viri- 
descens ; sordidé viridescens ; olivaceus ; aurantius ; limonius 
limonio pallido maculatus; viridescens rufo-brunneo-fasciatus ; 
pallidé aurantius ; rufo-brunneus, aurantio pallido lineatus ; 
fuscus aurantio sordido fasciatus; rufus pallido-tinctus et 
fusco aut aurantio fasciatus. 
Animalis color. Pes, caput et tentacula pallidé flavescentia. 
Operculum testaceo intensé pictum. 
Inhabits all the shores of the European seas abundantly. 
Colour of the shell brown-black ; dirty-yellowish ; black ; 
greenish ; dirty greenish ; olive ; orange ; lemon, spotted with 
