Plate 3. 



Fig. 1. Hi/nlonema pcduncidafnm. Micro-oxyhexact ; x GOO. 



2. " " Macramphidisc ; x 400. 



3. " " Micro-oxybexact ; x 600. 



4. " " Dermal pinule ; x 400. 



" 5. " " From a photograph. Lateral part of body sliced 



away on one side ; }. 

 6. " " Mesamphidisc ; x GOO. 



" 7. RegadreUa delicntn. Part of margin hounding 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. 



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



Dermal surface. Slender, parenchymal diacts omitted 

 except near margin, and there rejiresented as less numer- 

 ous than in nature ; x 45. 



