» 



Moore — On Irish Hejxiticcp. 607 



among species of Lemna and other aquatics. Not unfrequent in 

 ditches near the Shannon, Co. Limerick; by the side of the Bann 

 Eiver, above Drogheda ; still ditches near Lough Neagh, where 

 the canal joins the Lough at Lurgan. 



EicciocAEPXJS, Corda. 



Eiccia, Linn. Syst. Nat. Eicciocarpus, Corda, in Opiz, Natur. p. 651 

 (1829). Hemiseuma, Bischoif, ex Nees, Europ. Leberm., 4, p. 

 419 (1838). 



' ' Fruit immersed in the frond, and not protruding in either surface, 

 at length bared by an incision in the central groove." — Dum. 



Ricciocarpus natans, Corda. Frond inversely heart-shaped, grooved 

 in the centre of upper surface, from 5- to f of an inch wide, 

 clothed beneath and at the margin with long, purplish, pendent 

 rootlets, which latter are fringed with slender cilia-like serratures. 



Eiccia natans, Linn. Syst. Nat. ed. v. 12, p. 2 ; Engl. Bot. t. 252 ; 

 "Weber, Prodr. Hepat. p. 117 ; Hook, et Taylor, Muscol. Brit. ed. 

 2, p. 214 ; Lindenb. Synop. Hep., p. 121 ; Mongr. Eicc, 475, 

 t. 31-32 ; Nees, Eur. Leberm. 4, p. 419; Gr. L. et. K, Synop. 

 Hep., p. 606; Eabenhor. Hep. Eur. exsic. n. 2, 140, 499; 

 Sullivant's Musci et Hepat. U. S. p. 684, tab. 6. Eicciocarpus, 

 Corda, in Opiz, Naturalientausch, p. 651 (1829) ; Dumort. Hepat. 

 Europ. p. 172 (1874). 



Hab. Stagnant pools and ditches. Eare in Ireland. Abundant in a large 

 boggy pool about half-way between Drogheda and Navan, near 

 the Eailway, right-hand side going from Navan to Drogheda ; 

 ditch by the side of the Shannon, near Portumna, Co. Gralway. 

 Ditches near Passy, Co, Limerick, Dr. "W". H. Harvey. This 

 and the preceding species have been cultivated in Glasnevin Bo- 

 tanic Gardens, floated in pans of water, in which condition they 

 multiply quickly and fruit freely. 



Although I have followed Dumortier in his Hepaticse Europae in adopt- 

 ing the genera Eicciocarpus, Corda; and Eicciella, Al. Braun; 

 yet the characters as given by these authors for separating them 

 from Eiccia, Linn., &c., seem to me too slight for constructing 

 good genera on. 



Sr.CTIOIJ- II. JirN-GF,EirANlfIACEJ<:. 

 A. ScHIZOCABPJi. 



a. Anomogamje. 



"Prothallium disciform. Stems more or less regularly pinnate, more 

 rarely dichotomously branched. Leaves incubous, conduplicate, 

 the hinder lobe smallest — saccate, galeate, cucullato or flattish. 

 Amphigastria mostly present, rarely wanting. Inflorescence 



1;. I. A. PKOr., 8EK, II., VOL. II., SCIENCE. 3 N 



