93 



PLATE XXX VIl. 



Hyme.nmacidon sulpiiukea, Doirerhunk. 



Vol. ii, p. 208, ' Mon. Brit. Spongiadfe.' 



Fig. 1. — Represents the type-specimen presented to 

 me by Mr. Bean, of Scarborough. Natural size. 



Fig. 2. — One of the skeleton spicula. X 250 

 linear. 



Fig. 3. — A tension spiculiim of the dermal mem- 

 brane. X 250 linear. 



Hymeniagidon paupkrtas, Boirerhank. 



Vol. ii, p. 223, ' Mon. Brit. Spongiadaj.' 



Fig. 4. — Represents the type-specimen in the cabinet 

 of the Rev. A. M. Norman. Natural size. 



Fig. 6. — One of the sub-fusiformi cylindrical spicula 

 of the dermal membrane. X 250 linear. 



Fig. 0. — An attenuato-clavate, basally-spined skele- 

 ton spiculum. X 250 linear. 



Fig. 7.— One of the attenuato-clavate, internal, 

 defensive spicula. X 250 linear. 



Fig. 8. — ■ An expando-tridentate, equi-anchorate, 

 retentive spiculum. X 530 linear. 



Hymeniagidon subglavata, BowerbcmJc. 



Vol. ii, p. 209, ' Mon. Brit. Spongiadse.' 



Fig. 9. — Represents the type-specimen of the species 

 from Tenby. Natural size. 



Fig. 10. — One of the slender fusiformi-subclavate 

 spicula from the dermal membrane. X 250 linear. 



Fig. 11. — One of the skeleton spicula. X 250 

 linear. 



Fig. 12. — A contort, bihamate, retentive spiculum. 

 X 530 Unear. 



Fig. 13. — One of the minute, bidentate, inequi- 

 anchorate, retentive spicula^ x 530 linear. 



