PELAGIC LIFE, PALMOUTH. 51 



the 19th of June, quantities of Goniodoris nodosa, ranging from 

 2-4 m.m. in length, were dredged in the main channel of the 

 harbour. On the 2nd of May, two large Aplysia, measuring 

 10 and 1 3 cm. in length respectively, were secured with a landing 

 net from a bed of Zostera ; and, on the same day, four specimens 

 of Doris johnstonii were found by me while shore hunting. A 

 few specimens of Aplysia were dredged, during June, in the 

 main channel of the harbour, but these were small, the largest 

 individual not measuring more than 2-c.m. in length. 



Early in the spring, during the exceptional tides, large 

 quantities of oysters were found attached to stones in various 

 parts of the harbour ; a clear indication that an exceptional 

 heavy fall of " spat" had taken place during the previous year. 



Pisces. On the 7 th of May, on the under surface of a large 

 flat stone exposed during low-water, a mass of ova deposited by 

 Gobius niger was discovered. These ova were spread over a 

 large area, measuring 16 by 12 cm., the eggs being crowded 

 together. Microscopical examination shewed that the embryos 

 were in an advanced stage of development. Two adult fish of 

 the same species were found in a small pool of water which had 

 been covered by this stone, so perhaps these fish were guarding 

 their eggs, after the fashion of the fifteen-spined stickleback. 



REFERENCES. 



(1). ScoBBT, H. C. Nature. 13th September, 1894, No. 1298, Vol. 60. 



(2). Haddon, Alfked C. The Scientific Proceedings of the Royal Dublin 



Society, Vol. V. (N.S.), April, 1887. 

 (3). Cunningham, J. T. Journal of the Marine Biological Association of the 



United Kingdom, New Series, Vol. IE, No. 2, 



November, 1891. 

 (4). Gabstang. Walter. Ditto ditto Vol. Ill, No. 3, Oct. 1894. 



(5). Murray, John A Summary of the Scientific Results of the voyage 



of H.M.S. Challenger, 1895. 

 (6). Bles, Edward J. Journal of the Marine Biological Association of the 



United Kingdom, New Series, Vol. II, No. 4, 



1892. 

 (7). KoRSCHEiiT, E. &) Lehrbuch der Vergleichenden Eutvidcklungs- 



Heider, K. 3 geschichte der Worbellosen, Thiere, 1892. 



(8). McMUBRiCH, J. P. Stud. Biol. Lab. Johns, Hopkins's University, 



Baltimore, Vol. Ill, 1887. 



