110 ANALYTICAL INDEX. 



CHAPTER IV. continued. 



Animal identical with the Pholas dactylus, described, . PAGE 77 



Colour, ....... ib. 



Vernacular name Spout Fish, .... ib. 



Dwells in the sand, ...... ib. 



Difficult to preserve specimens alive, . . . .78 



Plate XVIII. described, ..... ib. 



THE OYSTER FISHERY, observations on, . . .78, 83 



CHAPTER IV. MISCELLANEOUS, . 84 



LEPAS CYPREA fScaphellum vulgare ?J ... ib. 

 Specimen on 23d October 1828 of the the same order as the Lepas, ib. 



Animal described, ...... ib. 



Exceedingly rare, ...... 85 



Rooted on a Tubularia indivisa, .... ib. 



Feelers cylindrical, ...... ib. 



Plate XIX. described, . ''.' . ib. 



SERPULA CONTORTA, ..... ib. 



Numerous on the rocks east of Portobello, . . . ib. 



Active and timid, ...... 86 



Apparently of two species, . . . . . ib. 



Colour, &c., ...... ib. 



To be found at Queensferry, . . . . ib. 



Plate XX. described, ..... ib. 



CHAPTER V. SPONGES. 



SPONOIA FLUVIATILIS (Spongilla fluviatilit) , . . .87 



Procured at Lochend 8th August 1839, ... ib. 



Stones encrusted with it very fragile, . . . ib. 



Colour dull dark green, and faint yellowish green, . . ib. 



Rises in low pyramids or thickened ridges, . . . ib. 



Ova dispersed throughout substance, ... ib. 



Motion of ova not sufficiently definite to admit of conclusions, . ib. 



Plate XXI. described, ..... 88 



SPONOIA ATTENUATA, ..... 89 



Found in a pond near Craigleith, August 1838, . . .90 



Invests stones, ...... ib. 



Of a dingy yellow colour, . . ..*'.. . . ib 



