THE BARREL-SHELLS. I 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 inculta^ 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 

 culcitella^ Gld. , cul-si-teF-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- iH- microscopic 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 Tornatella) pimcto- 

 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 subquadrata^ 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. 



