Plate 4. 



Fig. 1. Cnulnphdcus srliulzei. Unusual type of pinulus ; x 150. 



" 2. liegadixUa delicuta. Part of upper margin with adjoining lateral body wall. 



The slender parenchymal diacts of the body wall repre- 

 sented as less numerous than in nature ; x 14. 



" 3. Caidophacus schulzei. From a photograph. Upper body and stalk fastened 



together with pin ; }. 



" 4. Euplectella, sp. From a photograph. Lateral wall sliced away to show septa; {. 



" 5. Caiilojihuriis sc/iulzei. Discohexaster ; x 250. 



' G. " " Small type of discohexaster ; x 250. 



" 7. " " Pinulus from dermal surface; x 150. 



" 8. " " Uncommon type of pinulus from gastral surface; x 150. 



" 9. " " Pentact ; x 70. 



" 10. " " Pinulus from gastral surface ; x 150. 



" 11. Regadrella ddicata. From a photograph. Dermal and gastral surfaces of lower 



part of body ; dermal surface to the left ; gastral surface 



to the right ; \. 



