IN THE MUD OF THE LEVANT. 79 



tions, of which the arrangement varies in different 

 specimens, the row fringing the broad extremity, 

 being the most constant. The irregular projecting 

 surface is marked with dehcate reticulations. As 

 I believe it has not been figured, it may be pro- 

 visionally called C. echinulata. 



Fig. 77 is either another species, or, what is 

 possible, a young state of the last. 



Fig. 78 is an exquisitely elegant form, belonging 

 to the same class of objects. It is shaped like 

 an Area, with two lengthened projections at the 

 umbones. I have seen several specimens of it. 

 C. umbonata would be an appropriate name. 



Fig. 79- Some forms of this species seem to 

 approach to young states of fig. 75. It is 

 possible that they may be identical. Many 

 recent Entomostraca vary considerably at dif- 

 ferent stages of growth. As, however, I have 

 seen several specimens of it, and they seem 

 constant in form, the name of C. serrata may be 

 given to it. 



Fig. 80 is the most common species, examples 



