EXPLANATIOX OF PL.VTE X, 



(All ligurcs after Clark.) 



PsAM MECHixus CiNXULATrs Clark 



1-3. Dnrsal, \-cntral ami lateral \ie\vs of a complete individtial. 



4. Interanilmlacral area, enlarged. 



5. Three interanibiilacral ])late^ hiyldy magnilied. 



6. Aml)tilacral area, enlarged. 



7. Four aniliiilacr.al iilate<. highly inagnil'ied. 



8. (..)ral opening, enlarged. 



9. Tubercle, enlarged. 



lliicculnwii Jimcsand. 



2.SS 



9CX3 



