PLATE II. 



Geantia oiliata, Fleming. 



Vol. ii, p. 19, ' Mon. Brit. Spongia,dcG.' 



Fig. !.■ — ^A large-sized specimen from the River 

 Orwell, figured of the natural size, and in the condi- 

 tion in which it came from its natural locality, having 

 been preserved in a saturated solution of salt and 

 water. 



Fig. 2. — A large-sized specimen, with a small one at 

 its base, from the same locality as No. 1, figured of the 

 natural size in the dried condition. 



Fig. 3 — A longitudinal section of a large-sized dried 

 specimen from the River Orwell, showing the origin of 

 the cloacal cavity at the proximal end of the sponge, 

 and its gradual expansion until it reaches its distal 

 extremity. Natural size. 



Fig. 4. — A group of specimens of about the usual 

 size of the species figured in the condition in which 

 they came from the sea at Plymouth, of the natural 

 size. 



Figs. 5, 6. — Short varieties of the sponge, of the 

 natural size and in the dried state, from Guernsey, by 

 the late Mrs. Buckland; 5 with the excurrent orifice 

 expanded. No. 6 with the orifice contracted. 



Fig. 7. — A nearly spherical specimen, of the natural 

 size in the dried state, from Guernsey, by Mrs. Buck- 

 land. 



Fig. 8. — A longitudinal section of the sponge, repre- 

 sented by fig. 7, exhibiting the cloacal cavity and the 

 spicula of the exciun^ent orifice. Natural size. 



Fig. 9. — A portion of a long attenuated-acei-ate 



