SPINDLE SHELIvS. 21 



mark of this species. These shells may be found on 

 rocks, between tides, and may be easily recognized by 

 the figure and the description. 



Maa^oii Kelleith\ A. Ad., Kel-let'-ti-i, is a larger 

 species, found on the coast of Lower California. The 

 shell is of a dark color, nearly smooth, or marked with 

 low ridges. The aperture is very large, the outer lip 

 thin, and the canal a mere notch. Its length is more 

 than an inch. 



Trophon miiltico statics^ Bsch., Tro^-fon mul-ti-cos- 

 ta'-tus, is a northern species, having a small, pear- 

 shaped, white shell, with several sharp, frill-like 

 varices. The sutures are deep, and the few whorls 

 of the spire are very distinct. Otherwise it is smooth. 

 Length, less than an inch.' 



Trophon Orpheus^ Gld., Or-fe'-us, is smaller than 

 the last, but similar in shape. The sharp, white 

 varices make a crown at the sutures. These varices 

 are crossed by small spiral lines. 



Fiisiis Kobelti^ Dall, Fu'-sus Ko-beF-ti, is found on 

 Santa Catalina Island. It is spindle-shaped, and very 

 graceful in form. There are five or six whorls, with 

 nine elevations on each whorl, crossed by fine, dark, 

 spiral lines. Color, whitish ; length, from an inch 

 to two inches. 



Fiisiis ambiistiis^ Gld., am-bus'-tus, has a small, 

 spindle-shaped shell, with a rather long aperture. 

 The dark-colored surface is roughened by numerous 

 knobs and spiral lines. Length, less than an inch. 



A beautiful shell found occasionally at San Diego, 

 and further to the south, is known as M2irex trialatiis, 

 Sowb., Mu^-rex tri-a-la'-tus. It is a representative of 

 the great genus of rock-shells, which are so abundant 



