PLATE XXIII. 



1. 



la. 



16. 



2. 



2a. 



26. 



3. 



4. 



4(1. 



46. 



4c. 



5. 



5a. 

 55. 



Eiichlanis lyra . 



5) ... 



Euchlanis pyriformis 



Euchlanis niiiseta (?) 

 Euchlanis triquetra 



Euchlanis dilatata 



6. Euchlanis maorura 



dorsal view . 



ventral view . 



foot, and contained vessels 



ventral view . 



transverse section . 



front-edges of lorica 



side view 



dorsal view . 



side view 



ventral ^-iew of lorica . 



transverse section . 



ventral view : a, edge of dorsal plate ; 5, edge 

 of the flange of ventral plate ; c, edge of 

 the portion connecting the dorsal and 

 ventral plates, and at right-angles to both . 



dorsal front-edge of lorica .... 



ventral fi'ont-edge of lorica . . . 



dorsal view 



H 

 H 

 H 

 H 

 H 

 H 

 H 

 H 

 H 

 H 

 H 



H 

 H 

 H 

 H 



