64 REPORT OF THE COUNCIL. 



Samples were also taken each week midway between Plymouth and 

 the Channel Islands, from the s.s. Dcvonia. 



The records of the species found on each of the quarterly cruises are 

 published in the Bulletin of the International Council. 



As in the preceding years, it was found that the percentage of 

 Oceanic species in the Plankton falls regularly as one passes up the 

 Channel from west to east, rising again a little to the east of the 

 Cherbourg-Southampton line. 



In August 1906 the Pteropod Limacina lesueuri (D'Orbigny) was 

 found in vast numbers at the surface in the north-west portion of the 

 English Channel, and to the north of the Scilly Islands. 



This Pteropod, which Professor Paul Pelseneer was good enough to 

 identify, is an inhabitant of tropical waters, and has not previously 

 been recorded north of the Bay of Biscay, so that its appearance in 

 the Plankton would seem to indicate an inflow of water of southerly 

 origin. 



It is possible that the shoal entered the Channel from the south-west, 

 following the direction of the strong current which at times flows past 

 Ushant, in a northerly direction. 



As no Plankton samples were taken in the south-west portion of the 

 Channel between May (when Limacina was entirely absent from the 

 Plankton) and August 1906 it is not possible to obtain any confirmation 

 of this supposition. 



At the end of August 1906 an extra set of Plankton samples was 

 taken about 60 miles south-west of Parson's Bank. 



These samples contained a number of forms which had not been 

 found on any of the quarterly cruises. 



Published Memoirs. 



The following papers, either wholly or in part the outcome of work 

 done at the Laboratory, have been published elsewhere than in the 

 Journal of the Association : — 



Bidder, G. P. — Princi;pal Eesults of the Experivients with Bottom-Trailers. Rapp. 

 et Proc. Verb. Cons. Internat p. I'explor. de la mer, vol 6., 1906, pp. xxxv.-xlii. 



Chubb, G. C. — The Growth of the Oocyte in Antedon : A Morphological Study in the 

 Cell- Metabolism. Phil. Trans. Roy. Sec, Ser. B, vol. 198, 1906, pp. 447-505. 



Cotton, A. D.—On some Endophytic Alga;. Journ. Linn. Soc. Botany, vol. 

 37, 1906, pp. 288-297. 



Davenport, C. B. — Evolution without Mutation. Journ. Experini. Zool., vol. 2. 

 1905, pp. 137-143. 



Hewett, C. G.—Ligia. Liverpool Marine Biology Committee. Memoir xiv., 

 London, 1907. 



