228 



MOLLUSKS : LAMELLIBKANCHIA. 



Fig. 441 — Fig. 442. — 

 Sphaerium. Tiiyasir.T 

 Northern New England. 

 States. 



Fig. 440. — Astarte. Fig. 443. — Sphaerium. 



New England. Northern States. 



Fig. 444. — C^-therea. Reduced. Fig. 445. — Mactra. Great 



West Indies. Britain. 



Fig. 447 — Tel- Fig. 448. — Tellina. 

 .lina. United States. United States. 

 Fig. 446. — Tclliiin. Great Britain. 



Fig. 449. — Razor Shell, or Solen Much reduced. Both shores of 

 the Atlantic. 



Pholades and Shipworms. 



Pholades have the shell very hard and rough, like a 

 ra.sp, and they burrow into all sorts of substances, even 

 into stone. Shipworms are long MoUusks, looking like 



