76 





M 



Figure 53: General view (A) and hinge of right valve (B) of the veliconcha of Crerwmytilus 

 grayanus; general view (C) of the veliconcha of Modiolus dijficilis. 



Ecology 



C grayanus breeds throughout the summer along the southern coast of 

 Sakhahn, with larvae occurring in the plankton from July to early October. 

 Breeding peaks earlier or later, depending on temperature conditions. More 



