127 



PLATE L. 



LsoDiCTYA ANOMALA, Boiverhaii/,-. 



Vol. ii, p, 293, " Mon. Brit. Spongiadce.' 



Fig. 1. — Represents the type-specimen of the species 

 from Torbay, by Mrs. Griffitlis. Natural size. 



Fig. 2. — One of the large, stout, acerate, skeleton 

 spicula of the primary lines of the skeleton. X 260 

 linear. 



Fig. 3. — An inflato-fusiformi, acerate spiculum, from 

 the secondary lines of the skeleton. X 250 linear. 



Fig. 4. — A slender, acerate, tension spiculum, from 

 the interstitial membranes. X 250 linear. 



IsoDiCTYA DENSA, Botverhwnk. 



Vol. ii, p. 292, ' Mon. Brit. Spongiadas.' 



Fig. 5. — Represents the type-specimen of the species 

 in the cabinet of the Rev. A. M. Norman. Natural 

 size. 



Pigs. 6 and 7. — Two spicula from the skeleton of 

 the sponge. X 250 linear. 



There is a small specimen of Microciona plumosa, 

 adhering to the specimen at («), figure 5. 



IsODiCTYA PALLIDA, Boiverbank. 



Vol. ii, p. 297, ' Mon. Brit. Spongiadae.' 



Fig. 8. — Represents a large and very fine specimen 

 of the species, from the Diamond Ground, oflF Hastings. 

 Natural size. 



Fig. 9. — One of the skeleton spicula. X 250 

 linear. 



Fig. 10. — A slender, fusiformi-acerate, tension 



