295 



PLATE LXXXVI. 



CiooALYPTA Leei, Bowerhmilc. 



Fig. 1. — Kepresents fhe type specimen based on a 

 small stone. Natural size. 



Fig. 2. — A view of a fractured section of tlie interior 

 of the sjDonge, near the base of the penicillate organ, 

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

 S]3icnlous fasciculi radiating from the central axis to 

 the circumference of the sponge, x linear. 



Fig. 3. — Represents a portion of the dermal sm'face 

 of the penicillate organ with its polyspiculous network 

 and porous areas. X 80 linear. 



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



Spongilla Pakfitti, Boiverhanh, 



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

 from the river Exe. Natui'al 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 8'pongillct Parfitti. x 250 linear. 



Fig. 9. — One of the incipiently spinous, skeleton 

 spicula of 8. Parfitti. X 250 linear. 



Fig. 10. — One of the largest rotulate spicula from 

 an ovary of 8. 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. 



