BRITISH SPONGIADTti. 301 



Chalina, Grant. 



Section # Skeleton spicula, acerate. 



1. Chalina ocidata, Bowerbank. 



:2. cervicornis, Bowerbank. 



3. Montaguii, Bowerbank. 



4. Fleminr/ii, Bowerbank. 



5. gradient a, Bowerbank. 



6. limbata, Bowerbank. 



7. Grantii, Bowerbank. 



Section * * (?) Skeleton spicula, acuate. 



8. Chalina seriata, Bowerbank. 



1. Chalina oculata, Bowerbank. 



Halichondma oculata, Johnston. 

 Spongia levigata, Montagu. 



Sponge. Pedicelled, branching variously, occasionally pal- 

 mate or digitate, branches round or compressed ; 

 surface even. Oscula small, slightly elevated, often 

 arranged in lines on one side of the branch. Pores 

 inconspicuous. Dermal membrane sparingly spicu- 

 lous ; spicula acerate, slender. Skeleton. Symmetrical ; 

 spicula sub-fusiformi-acerate, short and stout. Inter- 

 stitial membranes nearly obsolete, sparingly spiculous ; 

 spicula acerate, slender. 



Colour. Alive, yellow, with a tint of green. 

 Habitat. Coasts of England, abundantly, J. S. Bower- 

 bank. 



Examined. In the living state. 



