The Whelks. Trumpet Shells 



Stimpson's Sipho (S. Siimpsoni, Morch.) is found in water 

 from twenty to one hundred feet deep, off the coast of New 

 England. \t is dad in a thick, horny epidermis, which is 

 sometimes velvety. There are seven or eight whorls, forming 

 a very graceful shell, destitute of decoration, except for the 

 crossing faint striae and wavy growth lines. The canal is 

 recurved. Length, 3 to 5 inches. 



Habitat. — Arctic Seas to Cape Hatteras. 



S. pigmaeus, Gld., scarcely over an inch long, is found with 

 the young of the large species. Its many whorls are invested with 

 a velvety, corrugated, drab epidermis. 



Habitat. — New England coast to Cape Fear. 



Genus SIPHONALIA, A. Ads. 



Shell thin, ovate, spindle-shaped; whorls bearing nodose 

 longitudinal folds and spiral ribs; colouring variegated; canal 

 short, twisted. 



A genus of sub-tropical distribution, centring in Japan, but 

 extending to America and Australia. 



Kellett's Spindle Shell (S. Kellettii, Forbes) has colonised 

 the California coast from its home in Japanese waters. Its brown- 

 ish white shell is handsomely knobbed. It is found in the shal- 

 lows at low tide. Length, 3 to 5 inches. 



THE GIANT WHELKS. PEAR CONCHS. LIGHTNING 



SHELLS 



Genus FULGUR, Montf. (BUSYCON, Bolt.) 



Shell large, heavy, depressed below the apex, sculptured by 

 fine revolving ridges crossed by radiating growth lines; columella 

 drawn out into a slender stalk; body whorl large, aperture oval 

 with elongated anterior canal; operculum horny; foot large; 

 sexes separate; egg capsules keeled, on connecting ribbon. 



The Knobbed Whelk (Fulgur carica, Gmel.) is one of the 

 two largest and most characteristic univalve mollusks of the 

 Atlantic coast north of Cape Hatteras. Its side partner is F. 

 canaliculaius. These two great ocean snails are much alike in 



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