75 



PLATE XXX. 



Hymeniaoidon Thomash, Boioerhank. 



Vol. ii, p. 155, ' Mon. Brit. SpongiadEB.' 



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

 in the dried state. Natural size. 



Fig. 2. — One of tlie skeleton spicnla. X 150 linear. 



Fig. 3. — One of the slender acerate spicnla of the 

 interstitial membranes. X 150 linear. 



Hymeniagidon coccinea, Buwerbank. 



Vol. ii, p. 156, ' Mon. Brit. SpoiigiadEe.' 



Fig. 4. — Represents the type-specimen of the species 

 from Salcombe Bay, Devonshire, in the dried state. 

 Natural size. 



Fig. 5. — A larger specimen of the species from 

 Jersey; in the cabinet of the Rev. A. M. Norman. In 

 the dried state. Natural size. 



Fig. 6. — One of the subfusiformi-acerate spicula of 

 the skeleton. X 150 linear. 



Hymeniaoidon Beettii, Boiverhank. 



Vol. ii, p. 158, ' Mon. Brit. Spongiadse.' 



Fig. 7.- — The type-specimen of the species figured 

 from the dried sponge. Natural size. 



Fig. 8. — One of the fusiformi-acerate, skeleton 

 spicula. X 150 linear. 



Fig. 9. — A slender acerate spiculum of the dermal 

 membrane. X 150 linear. 



Since the description of the type-specimen I have 



