THE BARREL-SHELLS. 1 25 



General surface light brown; length one-fourth of an 

 inch or less. 



The remaining species mentioned in this chapter 

 inhabit the sea and are mostly carnivorous. 



Tornatina harpa, Dall, Tor-na-ti'-na har-pa, has a 

 white shell with a short spire, a cylindrical body- 

 whorl, and an aperture which is long, narrow, and 

 curved at the base. The length is less than one- 

 fourth of an inch. 



Tornatina incnlta, Gld., and Tornatina carinata, 

 Gld., closely resemble the preceding species. They 

 are found in the south, on mud flats between tides. 



Fig. 114 represents the shell of Tornatina 

 cnlcitella, Gld. \ cul-si-tel'-la. It resembles 

 the former three species in shape, but is much 

 larger, sometimes growing to a length of 

 nearly an inch. The color is brownish, and 

 fresh specimens are banded with numerous 

 Fig. in- m i cr oscopic striae. 



A pretty little shell is occasionally found upon the 

 beach, having the form shown in Fig. 115. On 



t account of its cylindrical shape and dark bands 

 it commonly called the Barrel-shell. Its scien- 

 tific name is Rhextaxis (or Tomatelld) puncto- 

 ccelata, Cpr.,. Rex-tax'-is punk-to-se-la'-ta. 

 Fig. 115. Its length is about half an inch, and its form 

 is oval. The whorls are few, and there is a fold on 

 the columella. Its surface is pure white, crossed by 

 two series of narrow black bands. 



Amphisphyra siibqaadrata, Cpr., Am-fis-fy'-ra sub- 

 quad-ra'-ta. Minute, thin, spire depressed, body- 

 whorl short and full. Whitish; one-eighth of an 

 inch in length. 



