173 



PLATE LXVIII. 



CHALINA FLEMINGII, BowerbanJc. 



Vol. ii, p. 370, ' Mon. Brit. Spongiadse.' 



Fig. 1. Represents the type-specimen parasitical on 

 a slender Fucus. Natural size. 



Fig. 2. -A full-sized spiculum from the fibre of the 

 sponge. X 530 linear. 



CHALINA MONTAGUII, Boiverbank. 



Vol. ii, p. 366, ' Mon. Brit. Spongiadas.' 



Figs. 3 and 4. Specimens obtained at Brighton by 

 Mr. Thomas Ingall. Natural size. 



Fig. 5. A spiculum from the fibre of the sponge. 

 X 530 linear. 



CHALINA GRANTII, Bowerbank. 



Vol. ii, p. 375, ' Mon. Brit. Spongiadse.' 



Fig. 6. Represents the type-specimen found by 

 Mr. Thomas Ingall at Brighton. Natural size. 



Fig. 7. One of the spicula from the skeleton fibre. 

 X 530 linear. 



