264 - MR. F. STEPHA3T S HEVISI0X OF 



have a remarkably prolonged growth, not only in length, but nlso 

 in thickness of stem and branches, such as is not observed in any 

 other genus of Hepaticse. In Plagiochila, for instance, new 

 plants springing from the creeping axis have stems of a thick- 

 ness which is variable in different species, but never changing 

 during lifetime; in Aneura fucoides, on the contrary, the thick- 

 ness of the stem, similar to our forest trees, is continually 

 increasing with advancing age; while we can fix the number 



& ~~ . — £, ~ 



cf stem-cells found in a transverse section of Ceplialozia or 

 Zejeunea, it is often impossible to do so in Aneura — a great 

 drawback for a trustworthy description. 



2. Aneura CoLEysor, 8teph. % sp. n. 



Dioica, majuscula, gracilis, flavo-virens vel olivacea, laxe de- 

 presso-csespitosa. Frondes 2-3 cm. longse, planse, regulariter 

 bipinnahe, circumscriptione oblongse ; truncus 1 mm. latus, basi 

 stoloniferus, rami dimidium angustiores, pinnulse angustissimse, 

 omnes in sectione piano biconvexi. Cellulse corticales 0020 mm., 

 centrales multo majores, quadristratae, cuticula cellulis magnn 

 erectis acutisque hirta. Plores feminei in ramulis brevibus de- 

 curvis canaliculars, margine cellulis conicis obsitis. 



A most beautiful plant, entirely covered with large conical 

 cells, the walls of which are thickened at the apex. 



3. Aneura dentata, Steph., sp. n. 



Sterilis; dilute olivacea, robusta, in cortice terraque repens. 

 Frons usque ad 7 cm. longa, in latas plagas prostrata, irregu- 

 lariter multiramosa, plana, lobis latis pinnalim lobulatis, lobuli 

 breves rotuudati apice cellulis acutis prominentibus dentati, 

 dentes in margine vetustiore evanidi ; in sectione ubique fere 

 a?quicrassa (G cellulas) margine ipso solum attenuata. Flores 

 ignoti. 



If it had not been for the size of the plant and the remarkably 

 dentate margin of the younger lobes, I should not have named 

 these sterile specimens ; they are certainly different from Aneura 

 alterniloba, which, being a very common New Zealand plant 

 and abundantly represented in Colenso's collection, can be re- 

 cognized at once by the almost spiny calyptra. It is described 

 Hook, f., ' Handbook of the N. Z. Flora/ p. 5-43) as having the 

 margin of the frond minutely and remotely toothed, which I have 

 not seen in any of the specimens sent. 



