26 
FISHES AND FISHERIES OF THE IRISH SEA. 
Polycera quadrilineata 
Corbula gibba 
Mactra stultorum 
Serobicularia alba 
Portunus depurator 
Corystes casstvelaunus 
fTyas coarctatus 
Stenorhynchus phalangium 
Eupagurus bernhardius 
Crangon vulgaris 
Pseudocuma cercaria 
Diastylis rathket 
D. spinosa 
Balanus balanoides 
Paratylus swammerdammit 
Harpinia neglecta 
Ampelisca levigata 
Monoculodes longimanus 
Amphilochus melanops 
Pariambus typicus 
Achelia echinata 
Aphrodite aculeata 
Nerets, sp. 
Terebella, sp. 
(2) Syllis, sp. 
Serpula, sp. 
Spirorbis, sp. 
Cellaria fistulosa 
Flustra foliacea 
Eucratea chelata 
Serupocellaria reptans 
Buguila, sp. 
Cellepora pumucosa 
C. avicularis 
Porella compressa 
Mucronella peachit 
Membranipora membranacea 
M. pilosa 
Alcyonidium gelatinosum 
Vesicularia spinosa 
Gemmellaria loricata 
Lichenopora hispida 
Crista eburnea 
C. cornuta 
Tdmonea serpens 
Astertas rubens 
Amphiura squamata 
Ophioglypha albida 
Tealia crassicornis 
Alcyonium digitatum 
Clytia gohnstont 
Lafoéa dumosa 
Hydrallmania falcata 
Halecium halectnum 
Antennularia ramosa 
Coppinia arcta 
Sertularella polysonias 
Sertularia absetina 
S. argentea 
Diphasia rosacea 
D. tamarisca 
Tubularia tndivisa 
This was a haul—from very shallow water—which combined mere quantity of life, 
i.é., number of individuals, with variety of life or number of species and genera. The ten 
species of fish were represented by 879 individuals, and we estimated that there were some 
hundreds of crabs and of starfishes, and some thousands of shrimps. The numbers of 
the Molluscs, of the hermit-crabs, of Ba/anus and of Spirorbis were also very large. 
From these statements it is clear that whether it be a question of mere mass of 
life or of variety of life, haul for haul, the shallow waters can hold their own against 
the deep sea, and form in all probability the most prolific zone of life on this globe. 
And of this zone, as seen in the Irish Sea, two very distinct types of abundance are seen, 
the Manx waters abounding in species, and the Lancashire in individuals. 
Now all these animals, large or small, bottom-haunting or free-swimming, if not them- 
selves fish, and edible, are related, directly or indirectly, as food or enemies, or competitors in 
the struggle for existence, with the subjects of our commercial fisheries. The various fishes 
move or migrate about the Irish Sea according to the seasons, the temperature, and the 
