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 A HISTORY OF LANCASHIRE BRACHIOPODA Only two species, Terebratula caput-serpentis, Linn., and Crania anomala, MOlI., arc known from the Irish Sea. CRUSTACEA The Crustacea have received more attention than any other marine group. The number of recorded species in the various sub-groups are: Brachyura, 28; Anomura, 13; Macrura, 23; Schizopoda, 18 ; Cumacea, 20 ; Isopoda, 22; Amphipoda, 134. The Copepoda have received an exceptional amount of attention ; about 260 species are now recorded, and of these nearly 50 are parasitic forms inhabiting fishes. Cirripedia are represented by eleven species. Balanus halanoides, Linn., the common barnacle or ' scab,' is, of course, the most abundant. At certain seasons in the year (March— April) the tow-nets at Piel may contain practically nothing else than the nauplius larvae of these pests. The extraordinary form Sacculina carcini is very abundant on the crabs captured off the mouth of the Mersey. Peltogaster, a peculiar cirripede parasitic on the hermit crab, has also lately been recorded. Ostracoda are relatively abundant, about fifty species being recorded. PYCNOGONIDA These are represented by twelve species. MOLLUSCA This group has naturally received very much attention ; 98 species of Lamellibranchia are recorded, about 175 species of Gastropoda, 10 species of Chiton, 3 scaphopods ; Dentalium entaU Linn., D. tarentinum, Lam., and Siphonodentalium lofotense, Sars. The cephalopods are Sepiola atlantica Lam., and S. scandica, Steenstrup, Rossia macrosoma, Delle Chiaje, Loligo media, Linn., and L. forbesi Steenstrup, Sepia officinalis, Linn., and Eledone cirrosa. Lam. TUNICATA Fifty-four species in all have been recorded from the Irish Sea. Most of these have been recorded from Puffin Island and Port Erin, and only four species are apparently recorded from the Lancashire coast. But there is no doubt that this is far below the number that might be found if looked for in suitable places. List OF PUBLICATIONS REFERRING TO THE MARINE ZOOLOGY OF LANCASHIRE 1. Bryerly, Isaac, Fauna of Liverpool, 1856. 2. McNicoll, D. H., Handbook for Southport, 1859. 3. Herdman, W. A. [Editor), Fauna of Liverpool Bay, ^ vols., 1886, 1889, 1892, 1895, 1900. Liverpool Marine Biological Committee. 4. Herdman, W. A. (Editor), Annual Reports Port Erin Biological Station, 1894 to 1 904 Liverpool Marine Biological Committee. 5. Annual Reports Lancashire Sea Fisheries Laboratory, 1892-1905; Liverpool. t.r ^'i'^!'^'^' o^""*'"- Monographs on Irish Sea Animals and Plants: Ascidia, W A Herdman 1899; Cardium, J. Johnstone, 1899; Echinus, H. C. Chadwick, 1900 ; Codtum^. J. Harvey. Gibson and Helen P. Auld, 1900 ; Alcyonium, S. J. Hickson, 1901 ; Lepeophtheirus and Lerncea, A. Scott, 1901 ; Lineus, R. C. Punnett, 1901 ; Pleuronectes, F. J. Cole and J Johnstone, 1901 ; Chondrus, O. V. Darbishire, 1902; Patella, J. R. A. Davis and T ■ J x^.Vn-^°' ' Aremcola, J. H. Ashworth, 1904; Gammarus, Margaret Cussans, 1904. -London, Williams and Norgate. j 7 -r T- Proceedings and Transactions Liverpool Biological Society, woh. 1-18. Liverpool, 1887- 8. Reports of the Southport Society of Natural Science : Southport, 1 892-1 904. 9. British Association Handhook : Liverpool, 1896. 10. British Association Handbook : Southport, 1 903. Note.— Nos. 3, 4, 5, and 6 are reprinted in Proceedings and Transactions Liverpool Biological 96