

THE OCEAN WORLD. 



Next to Doiiax comes the genus Tdlina, which includes many- 

 species of both small and large shells, all remarlcable for their beauty 

 of form, and for their brilliant and varied colours. One of these, 

 called the rising sun [Tel/ma radiaid), is represented in Fig. 137. 



Fig. 140. — Tellina donacina (Linnaeus). 



The Tellinas are found in every sea ; the French coast furnishes 

 many species : such as Tdliiia virgata (Fig. 138) and Tellina sulphurea 

 (Lamarck), Fig. 139. In Fig. 140 Tellina donacina is represented 

 with its two tubes or siphons. 



The seventh family, or Mactridse, includes Lutraria and Mactra, 



Fig. 141. — Venus venucosn (Linnasus). 



They are widely distributed genera, and there are several British 

 species of both. 



The eighth family, Veneridae, includes Venus, Cytherea, Meroe, 

 and Artemis ; beautiful genera, and as such called by Linnteus and 

 his followers after heroines of Greek mythology; Petricola, Venerupis, 



