BRITISH SPONGIADiE. 361 



Chalina, Grant. 



SiiCTioN * Skeleton spicula, acerate. 



1. Chalina oculata, Bowerbank. 



2. — cervicornis, Bowerbank. 



3. — Montaguii, Bowerbank. 



4. — Fleminffii, Bowerbank. 



5. — ffracilenta, Bowerbank. 



6. — limhata, Bowerbank. 



7. — Grantii, Bowerbank. 



Section * * (?) Skeleton spicula, acuate. 

 8. Chalina seriata, Bowerbank. 



1. Chalina oculata, Bowerbank. 



Halichondria. oculata, Johnston. 

 Spon&ia 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. 



