Cl.oSTKkHM. 101 



Excr.Axn. Cumberland ! Westmoreland! 

 W. and X. Yorks ! Cheshire (lti/). Leicester (Roy). 

 Warwick (Wills). Gloucester (Ralfs). Surrey 



(/.yo'osp. from r rinirsley Common) ! Sussex (7W/x). 

 Hants (Ili'Uiicft). Devon (/>V////r//). Cornwall! 

 ( Marqiictml). 



WALES. Bettws-y-coed (Hoi/), Capel Curio-! (Y~W,v 

 t \'' ir/V/.s 1 ), near Dolbadarn Castle!, and Llyn Padarn!, 

 Carnarvonshire ! Dolgelly, Merioneth (Halfx). 



SCOTLAXD. Ross, Inverness, Aberdeen, Kincardine, 

 Forfar, Perth ! , Argyll (Rmj j- 7W'//). In the plank- 

 ton of Loch Doon, Ayr (with zyo-osp.) ! Suther- 

 land ! Harris and Lewis (not uncommon in the plank- 

 ton; with zygosp. from near Balallan), Outer Hebrides ! 

 Orknevs ! Slietlands ! 



tj 



IEEI AND. -- Donegal ! Mayo! Galway ! Kerrv ! 



O i tJ / 



Dublin and Wicklow (Archer). 



<l<'<ir. Distribution. France. Germany. Austria 



. v 



and Galicia. Italy. Norway. Sweden. Denmark. 

 Bornholm. N. and S. Russia. Japan. Ceylon. 

 Sumatra. Australia. Madagascar. United States. 



f/. fftaccttm is much the slendorc'st of tho "beaked " Clnx- 

 fcrin. Tlie body of the cell is relatively very small, :md the 

 apical processes are loii- and very tliin. I'lie striolatioiis on 

 the cell-wall arc very faint and in some of the smaller speci- 

 mens are scarcely evident. 



/ 



It is n much rarer species than either ('!. raxtral inn or 

 ('/. Kiit ::!)>(/! I. 



EXCLUDED SPECIKS. 



i 'Inxlrriiuit xithlUi' Hreb. Liste Desm. 18-V, p. I-').'), 

 t. '2, f. 48. For the most part Alga? recorded under 

 this name have been species of li//f/j>l//<li/iin (01- A//H- 

 strodeswus). 



Clostrriwm drijjifliii Berk, in Ann. jMao-. Nat. Hist. 

 1S-VI., p. 250, t. 14, f. 2 (= IM.i j>lt i<] in, sp.). 



