. The shell book . lid, glossy, with astrong rounded ridge spotted with brown at the base of eachwhorl. The ground colour ranges from brown to lilac, streakedin zigzag bands with brown. A full-grown specimen has a dozencoils. The animal is as vividly coloured as the shell. The promi-nent head has a two-lobed flap between the long tentacles. Theblack eyes are on short stalks. Four pairs of cirrhi are thrustout sidewise from the mantle, as the creature crawls along thesea bottom, carrying the shell erect on its back, and the oper-culum lying behind it on the extended foot. From low watermark to
. The shell book . lid, glossy, with astrong rounded ridge spotted with brown at the base of eachwhorl. The ground colour ranges from brown to lilac, streakedin zigzag bands with brown. A full-grown specimen has a dozencoils. The animal is as vividly coloured as the shell. The promi-nent head has a two-lobed flap between the long tentacles. Theblack eyes are on short stalks. Four pairs of cirrhi are thrustout sidewise from the mantle, as the creature crawls along thesea bottom, carrying the shell erect on its back, and the oper-culum lying behind it on the extended foot. From low watermark to many fathoms depth this mollusk thrives, its food theseaweed. The shell measures somewhat over an inch in heightand diameter of base. The lining is beautifully pearly. A variety, conuloides, Lam., is found on the Atlantic coastof Europe. It shows great variability from almost smoothwhorls to strong spiral ribbing, including all intermediate colouring there is little variation from the type species. The 214. SEA SNAILS AND TURBAN SHELLS 1 Navicclla JanelH. 2 Nerila tessellata. 3 Neritina com munis. 4 Neritina reclivata. 5 Helicina maxima. 6 Neritofisis rudula. Ncrila Sarmaticus. 9 Turbo Turbo petliolatus.
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Keywords: ., bookcentury1900, bookdecade1900, bookidshellbook00r, bookyear1908
