■ ■»■'' ■ . . ■ - 



Vol. IV. NOVEMBER, 1895. No. 11. 



A NEW BRITISH PANTOPOD. 



TANYSTYLUM CONIROSTRE (DOHRN). 

 BY GEORGE H. CARPENTER, B.SC 



[Collected (Sept., 1894), for the R.I. A. Flora and Fauna Committee, and 

 Exhibited (July, 1S95), before the Dublin Microscopical Glub.] 



(Pirate 6.) 

 Readers of the hisk Naturalist will, doubtless, recall Mr. 

 J. E. Duerden's paper on the Rock-pools of Bundoran ( p. i 

 of the current volume), and remember that in Mr. Welch's 

 excellent photograph which illustrates it, the most conspicuous 

 animal is the rock-boring Purple Sea-Vr chin (St?v?igjtoce?ittvtus 

 lividus). This urchin is one of the best-known examples of a 

 group of characteristic southern and Mediterranean forms 

 which, in British waters, are almost or altogether confined to 

 the western coast of Ireland, along which they often range a 

 considerable distance northwards. The same coast also 

 furnishes examples of northern and Scandinavian species, 

 many of which are found as far as the extreme south-western 

 corner. And so it comes to pass that the western shores of 

 Ireland present to the marine zoologist a most interesting 

 mixttire of northern and southern forms of life, which cannot 

 be found elsewhere in the British area. A similar mixture of 

 immigrants from the north and from the sotith is to be observed 

 in the land flora and fauna — the southern species often ranging 

 northwards to Donegal and the northern forms southwards to 

 Cork. 



While Mr. Duerden's researches at Bundoran and elsewhere, 

 during his too short residence in Ireland, were chiefly con- 

 cerned with the Hydroids and Polyzoa, our knowledge of 

 which he has done so much to advance, he was not neglectful 

 of other marine creattires. And, knowing my interest in the 

 Pantopods or P3xnogons — that ctiriotis group formerly classed 

 with the Cru.stacea, but now regarded either as very aberrant 



A 



