PLATE LXVI. 



Cytherclla alyssorum. 

 Figure 



1. Shell of female, seen from left side, x 50. 



2. ,, ,, ,, ,, above, x 50. 



15. Second maxilla, with branchial lamina (female). 



Cytherella Icevis. 



7. Shell of female, seen from left side, x 40. 



8. „ „ „ „ above, x 40. 



Cytherella serrulaia. 



3. Shell of female, seen from left side, x 40. 



4. ,, ,, ,, ,, below, X 40 (with ova). 



5. Shell of male, seen from left side, x 40. 



6. ,, ,, ,, ,, above, x 40. 

 9. Muscle-spots. 



10. Antennule. 



1 1 . Antenna. 



12. Mandible and palp. 



13. First maxilla, female. 



14. Second maxQla of male, without branchial lamina. 

 16. Third maxilla of male, with branchial lamina. 



f 780 ] 



