Plate 3. 



Fio". 



1. 



2. 



3. 

 4. 



Ilyalonema pexhinculatum. Micro-oxyhexact ; x COO. 



" " Macraiuphidisc ; x 400. 



" " Micro-oxyhexact ; x 600. 



" " Dermal pinule ; x 400. 



" " From a photograph. Lateral part of body sliced 



away on one side ; \, 



" " Mesamphidisc ; x 600. 



Begadrella delicata. Part of margin bounding oscular (sieve-plate) area, with 

 adjoining lateral body wall. Dermal surface. The 

 slender parenchymal diacts are represented, for the sake 

 of clearness, as less numerous than in nature ; x 14. 



" " Another part of upper margin, with adjoining lateral wall. 



Dermal surface. Slender, parenchymal diacts omitted 

 except near margin, and there represented as less numer- 

 ous than in nature ; x 45. 



