264 PLATE LXXXII. 



Fig. 10. One of the tension spicula from the dermal 

 membrane. X 250 linear. 



Fig. 11. A contort, bihamate retentive, spiculum 

 from the dermal membrane. X 250 linear. 



Fig. 12. One of the fusiformi-acuate skeleton 

 spicula. X 250 linear. 



ECIONEMIA COACTUEA, Bowerbank. 



Fig. 13. Represents the type-specimen in the 

 cabinet of Mr. W. Saville Kent. Natural size. 



Fig. 14. A subfusiform, acerate, skeleton spiculum. 

 X 80 linear. This figure also represents one of the 

 large primary defensive spicula. 



Fig. 15. One of the slender fusiformi-acerate spicula 

 of the secondary external defensive series. X 80 

 linear. 



Fig. 16. One of the large patento-ternate con- 

 necting spicula. X 80 linear. 



Fig. 17. A large attenuato-stellate, retentive spicu- 

 lum from the dermal membrane. X 530 linear. 



Fig. 18. One of the minute cylindro-stellate retentive 

 spicula from the dermal membranes. X 530 linear. 



Fig. 19. A recurvo-ternate spiculum from the inter- 

 marginal cavities. X 80 linear. These spicula are of 

 very rare occurrence, and their shafts are very long and 

 slender. 



Fig. 20. Microciona fictitia. 



