178 ANIMALS OF THE SEASHORE 



corresponds to the forecastle of the ship. The color 

 is white frequently with brown markings. 



These shells are found attached to other shells, 

 stones, and often to each other; most frequent 

 on shells inhabited by hermit crabs. Very large 

 boat shells are sometimes found attached to King 

 Crabs and occasionally to Bine Crabs. 



Variable in shape because of the object to which 

 they are attached. Very common all along the New 

 Jersey coast from tide pools to at least 25 fathoms; 

 ransre: Prince Edward Island to the West Indies. 



Crepidula plana Say (Flat Boat Shell; White 



Boat Shell) 



PLATE XVIII. Fig. 2 



Shell white and flat with suppressed spire at the 

 tip of the "bow"; The "stern" is square. Found 

 on the inside of shells, frequently those inhabited 

 by Hermit Crabs; occasionally on the outside of 

 flat shells, such as the oyster. Similar distribution 

 to the above. 



Crepidula convexa Say (Convex Boat Shell) 



PLATE XVIII. Fig. 4 



Very convex; usually spotted brown in color; 

 grows on pebbles or other objects suitable to its 

 shape. Very abundant from Nova Scotia to 

 Florida. 



