338 THE OCEAN WORLD. 
Next to Donax comes the genus Zé/ina, which includes many 
species of both small and large shells, all remarkable for their beauty 
of form, and for their brilliant and varied colours. One of these, 
called the rising sun (Zé¢//ina radiata), is represented in Fig. 137. 
Fig. 140.—Tellina donacina (Linnzeus). 
The Tellinas are found in every sea; the French Coast furnishes 
many species: such as 7e/lina virgata (Fig. 138) and Zellina sulphurea 
(Lamarck), Fig. 139. In Fig. 140 Zeina donacina is represented 
with its two tubes or siphons. 
The seventh family, or Mactridz, includes Lutraria and Mactra. 
Fig. 141.—Venus verrucosa (Linnzus). 
They are widely distributed genera, and there are several British 
species of both. 
The eighth family, Veneridz, includes Venus, Cytherea, Meroe, 
and Artemis; beautiful genera, and as such called by Linnzus and 
his followers after heroines of Greek mythology; Petricola, Venerupis, 
