1904 - 5 .] The Pelagic Fauna of the Firth of Clyde. 
791 
appearance of shoals, followed by a scarcity. This occurred 
conspicuously in April, September, and October, and less so in July 
and November. The increase was not entirely due to young forms, 
for on two occasions (in September and October) only large adults 
were present. The appearance of the shoals is probably due to 
fresh shoals drifting up the firth. 
HEMICHORDATA. 
Tornarnia. 
In 1901, a few specimens were taken on 18th July. 
In 1902, it was not seen. 
REFERENCES. 
Browne, E. T., 1900, “The Fauna and Flora of Valencia Harbour, 
Ireland.” Notes on the Pelagic Fauna, 1895-1898, Proc. 
R. Irish Acad., ser. 3, vol. v. pp. 669-693. 
Chun, C., 1898, Die Ctenophoren der Plankton- Expedition. 
(“National.”) 
Dalyell, E., 1847-48, Rare and Remarkable Animals of Scotland, 
2 vols., London. 
Forbes and Goodsir, 1840, “ On the Ciliograda of the British 
Seas,” Report, Brit. Assoc, for 1839, London. 
Fowler, G. H., 1897, “Contributions to our Knowledge of the 
Plankton of the Faeroe Channel,” No. III., Proc. Zool. Soc ., 
pp. 803-809, London. 
Haeckel, E., 1888, “ Siphonophora,” Challenger Reports. 
Korschelt and Heider, 1895, Text-book of the Embryology of 
Invertebrates. (English Translation.) 
Lohmann, H., 1896, Nordisches Plankton, III. Appendicularien, 
Kiel and Leipzig. 
Vanhoffen, E., 1903, Nordisches Plankton, XI. Ctenophoren. 
Watson, A. T., 1901, “On the Structure and Habits of the 
Polychseta of the Family Amnocharidee,” Jour. Linn. Soc., 
vol. xxviii. pp. 230-260, pis. xxiii.-xxv., London. 
(. Issued separately July 6 . 1905 .) 
