684 Proceedings of the Royal Irish Academy. 



July and gradually die off, leaving the young to develop 

 during winter. 



M'Intosli, 1889, Eeport, Fishery Board for Scotland, 

 Part iii., pp. 259-300. 

 A full account of its occurrence at St. Andi'ews in 1888. 

 Bolina hydatina oi Chun. Garstang, 1894, Joui-n. Mar. Biol. 

 Assoc, vol. iii. 



Found at Plymouth in May, 1892, and 1894. 

 Bolina hydatina, Yallentin, 1893, Joxuti. R. Instit., Cornwall, 

 vol. xi. ; 1896, vol. xiii., p. 45 ; 1897, vol. xiii., p. 254. 



Falmouth Harbour, June, 1892. Abundant in June, 1894; 



May, 1895 ; May, 1897. Some measured 5-4 cm. in length. 



Mnemia norvegica, n.s., Sars, 1835, Beskrivelser og Tagt- 



tagelser, &c. JS'orway. 

 Beroe lihlata, Dalyell, 1848, E,are and Remarkable Animals 



of Scotland, vol. ii., p. 254, plate liv. 

 Bolina norvegica (^}) Hartlaub, 1894, Arbeiten Biol. Anstalt, 

 Helgoland, Bd. i. Heligoland. 



Beroe ovata, Eschscholtz. 



1896. Beroe was not seen in July, but on August 1st a specimen, 



about 10 mm. in length, was taken. From the middle 

 of August to the middle of September it was a common 

 object in the harboiu', and at times quite abundant. 

 Most of the specimens were large, 50-75 mm. in 

 length. Early stages, 2-3 mm., were common on 

 September 14th, and again in IS^ovember. 



1897. During January and February a few young stages, 



2-4 mm. in length, were taken. It was not seen 

 during March and April ; and only one specimen of a 

 young stage was captured in May. From June to 

 November this Ctenophore was nearly always present 

 in the harbonr. It was very abundant dui'ing July 

 and October. The largest specimens were taken in 

 September and October. 



1898. It was first seen in July, and remained until J^ovember. 



Yery abundant during August and September. In 

 the autumn very large specimens, up to 90 mm. in 

 length and 50 mm. in breadth, were common. Small 

 specimens, 4-6 mm. in length, were taken about the 

 middle of August and duiing October. 



