47 



FAFNISTIC NOTES. 



]]y ANDREW Scott. 



(1) Acavthoineira sp. — This Radiolariau only occurred 

 at Port Erin in jN'ovember and December. In 1904 it 

 was noted at Port Erin in February, and oit Pliyl in 

 March. 



(2) Xoctihicd Dii^iaris. — A most extensive visitation 

 of this organism took place in 1905, and its movements at 

 the beg-inning- appear to be peculiar. It was first noted 

 in a collection from the Mersey on June Ttli, then at Port 

 Erin on. the 19th, and at Fishg^uard Bay on the 23rd. It 

 did not occur in tlie tow-nettinjrs taken on the North 

 AVales Coast on -June (ith, 20th or 21st, nf)r in twenty- 

 three watherinfi's from Cardig-an Bay, representing the 

 whole of Tune and rfuly. At the end of June it liad 

 become well diffused in the Northern area, and continued 

 to be so for the rest of the year. It turned up in Car- 

 narvon Bay on July 20th and in Cardigan Bay in August. 

 These records seem to point to a southerly drift rather 

 than a northerly, though one naturally expects that the 

 invasion would come from the South witli the greater 

 volume of water that enters the area by the South 

 Channel. An earlier collection at Port Erin, in June 

 might have thrown more light on this point. In any 

 case, some time would elapse before the organism reached 

 the Lancashire side after appearing at the Isle of Ma]i 

 if the distribution took place from the North, and 

 Xoctiluca was not present at Port Erin on May 11th. 

 Some of the tow-nettings taken during June, July and 

 August oif the Lancashire coast were pure collections of 

 this protozoan. So far as we know Xoefihua has not 

 occurred at Port Erin previous to 19()-''). 



