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The Smoke Shells

Genus TYPHIS, Montf.

Shell ovate or oblong, with projecting hollow tubes between the three spinose varices; aperture roundish, prolonged into closed siphonal canal; operculum as in Murex. Species: fifteen recent, eight fossil. Distribution, warm seas, Tropical America, Cape of Good Hope, Indian Ocean, Pacific Islands, China, Australia.

The Large Smoke Shell (T. grandis, A. Ads.) is a representative species of this small genus. The ascending tube contains an extension of the mantle margin. The varices are broad, fluted, fin-like, forming a wing on either side of the basal canal. The whorls are angled, the tubes short. Length, 1 1/2 inches.

Habitat.--Gulf of California.

The Four-winged Smoke Shell (T. tetrapterus, Bronn) is distinguished by the four fin-like expansions on the canal, which broaden into wing-like varices below the upcurving hollow tubes that adorn the spire. Length, 1 inch.

Habitat.--Mediterranean Sea.

The Long-horned Smoke Shell (T. longicornis, Dall) has a very long, straight anterior canal, a steep spire set with many upturned tubes, and two or more pointing downward on the body whorl. Length, 1/2 to 1 inch. Gulf of Mexico.