295 



PLATE LXXXVI. 



CIOOALYPTA LEEI, Bowerbank. 



Fig. 1. Represents tlie type specimen based on a 

 small stone. Natural size. 



Fig. 2. A view of a fractured section of the interior 

 of the sponge, near the base of the penicillate organ, 

 at right angles to its long axis, exhibiting the poly- 

 spiculous fasciculi radiating from the central axis to 

 the circumference of the sponge. X linear. 



Fig. 3. Represents a portion of the dermal surface 

 of the penicillate organ with its polyspiculous network 

 and porous areas. X 80 linear. 



Fig. 4. An acuate skeleton spiculum. X 80 linear. 



SPONGILLA PARFITTI, Boiverbank. 



Fig. 5. Represents the type specimen of the species, 

 from the river Exe. Natural size. 



Fig. 6. A specimen of the same species from the 

 Salmon Pool, Exeter. Natural size. 



Fig. 7. A variety in form of the same species from 

 Trews Weir, Exeter. Natural size. 



Fig. 8. Represents one of the spineless, acerate, 

 skeleton spicula of Spongilla Pdrfitti, X 250 linear. 



Fig. 9. One of the incipiently spinous, skeleton 

 spicula of S. Parfitti, X 250 linear. 



Fig. 10. One of the largest rotulate spicula from 

 an ovary of S. Parfitti, with two large spines on its 

 shaft, 'x 530 linear. 



Fig. 11. -One of the smaller and more usual size of 

 rotulate spicula from an ovary of S. Parfitti. X 530 

 linear. 



