2. PLATE IX. 



HYPERIA MEDUSARUM. HYPERIA HYSTRIX, d". 



The aniraal fioni tbe side (Vi)- 



Tlie first pair of antennas (-"/i)- 



» second » » » ("%)• 



The first pair of perteopoda ("Vi)- 



» second » » » (^Vi)- 



» third » » » (-"/i)- 



» fifth » » » (20/j). 



» seventh « » » (""/i)- 



The urus (27,). 



HYPERIA LATREILLEI, ef. 



The first pair of antenns (^/,). 

 The last joints of the flagellum of the same 

 pair (i»ö/i). 



The first pair of antennae of a young (-"/])- 

 The last joints of the flagellum of the same 

 pair (""/))• 



The second pair of antennas (Vi)- 

 The last joints of the flagellum of the same 

 pair (i«%). 

 The labruni (^V,)- 

 The right mandible (^Vi)- 

 A piece of the molar tubercle (^-"Z,). 

 The same more enlarged (°*%)- 

 The first pair of maxilte (^Vi)- 

 » second » » » (^Vi)- 

 A giandular hair from the same pair ('""/i)- 



') Thvough a change of drawings at tlie engraviiig of the plate that of an oider yomig vas engraved instead of 

 the stage described in the text p. 158, the drawing of vvhich will be given in the morphological part. 



Fig 



. 1. 



The male from the side (^/i). 





Fig. 22 



» 



2. 



The first pair of antennte. c/' ('^li)- 





» 23 



» 



3. 



The second » » » d" ("Vi)- 





» 24 



» 



4. 



The labrum. ef (^7,)- 





» 25 



» 



5. 



The right mandible. ef {"Vi)- 





» 26 



» 



6. 



The last joint of the mandibular palp. 



C^^-7i)- 



ef 



» 27 

 » 28 



» 



7. 



The first pair of maxillffi. ef" ("/i)- 





» 29 



« 



8. 



» second » » » ef CVi). 





» 30 



» 



9. 



The niaxiUipeds. ef (*7i). 







» 



10. 



The first pair of percTOpoda. ef CVi)- 







» 



11. 



» second » » » ef ("Vi)- 





» 31 



» 



12. 



« third >> » » ef (-Vi)- 





>> 32. 



» 



13. 



>> fifth » » » ef CV,)- 







» 



14. 



Cleft bristie from the first pair of pleopoda 



(20"/.)- 



(f 



» 33 

 » 34 



» 



15. 



Coupiing spine » » » » » » 



C^Vi)- 



ef 



» 35 



)) 



16. 



The urus. ef ("A)- 





» 36 



» 



17. 



The right mandible of the female (^"Z,). 







» 



18. 



The dactylus of the third pair of perseopoda 



C^-V,)- 



? 



» 37 

 » 38 



» 



19. 



The » » » seventh » « » 



("7.)- 



? 



» 39 

 « 40 



» 



20. 



) A young a day after having been hatched 



» 41. 







('»%)• 





« 42. 



» 



21. 



The first pair of perffiopoda of the same (^^o 



A)- 



» 43. 



