10 



cultivated but by few students, gave an impulse to the 

 popular study of the inhabitants of river and sea which 

 has extended throughout the country, and has attracted 

 considerable attention on the Continent. A very large 

 number of British species have been exposed in the tanks ; 

 many have bred; many have gone through their stated 

 transformations, and have been observed in all periods of 

 their growth. 



The following list presents the average number of species 

 of which the collection is composed : — 



1. ZoOPHYTA. 



1. Clava multicornis. 4. Hydra tuba. 



2. Hydractinia echinata. 5. Flustra — ? . 



3. Coryne sessilis. 6. Bowerbankia imbnca. 



2. ACTINOIDEA. 



1. Actinia mesembryanthemum. 11. Stomphia churchiae. 



2. parasitica. " 12. Peachia hastata. 



3. miniata. 13. Adamsia palliata. 



4_ dianthus. 14. Cerianthus merabrauaceus. 



5_ nivea. 16- Anthea cereus. 



6. anguicoma. 16. couchii. 



7_ bellis. 17- Corynactis allmanni. 



8. clavata. 18. Caryophylla smithii. 



9. coronata. 19- Zoanthus couchii. 



10. Bunodes gemmacea. 



3. ACALEPHai. 



1. Medusa aurita. 2. Sarsia prolifera. 



4. ECHINODERMATA. 



1. Asterina gibbosa. 4. Echinus sphsera. 



2. Pentacta pentactes. 5. Priapulus caudatus, 



3. Ocnus brunneus. 



5. Annelides. 



1. Serpula contortuplicata. 5. Sabella veniformis. 



2. triquetra. 6. vesiculosa. 



3. Sabella voluticornis. 7- Terebella ? 



4. tubularia. 



6. MOLLUSCA. 



1. Ascidia mentula. 8. Murex erinaceus. 



2. Clavelina lepadiformis. 9. Littorina littorea. 



3. Botrylus ? 10. Purpura lapillus. 



4. Patella vulgaris. H. Nassa reticulata. 



5. Ostrea edulis. 12. Haliotis tuberculata. 



6. Pecten varius. 13. Doris tuberculata. 



7. Anemia ? 14. Eolis coronata. 



