PLATE 23. 



Cross seel, ions of Donilersia californica. X 60. 



Fins. 1, '2, 3, 5 ('i)iT('spoii(l to lines A, H, C, D, fifj. 4, pi. .5 (antci-ior end). 



Fip. 4. 'Plirounh anterior end of mid s?ut. 



Fifrs. (■), (I are alonn lines G, F of tig. 2, pi. (posterior end). 



Fig. 7. 'rhongh nii<ldle of body. 



Fig. S. Section through radula. X 555. 



