﻿Evans : Hepaticae of Southern Patagonia 417 



figures of Jungermannia Pigafettoana. The original description of 

 Angstrom does not give an accurate account of the underleaves. 

 m the diagnosis of the species, we read : " amphigastria ovato-vel 

 lanceolato-subulatis j" and, in the fuller description which follows, 

 it is stated : "amphigastria caulis inferioris ovato-subulata, utrinque 

 in parte basali et sub subulam dente uno subulato instructa ; in 

 parte superiori caulis lanceolato-subulato subintegra sunt." As a 



matter of fact, the underleaves are deeply 2 -parted, and the 

 description quoted above applies to the divisions and not to the 

 complete structures. Angstrom also omits mention of the cuticle 

 °f the leaves, which is strongly verrucose, and is one of the most 

 striking peculiarities of the plant. 



19. Jungermannia Hatcheri sp. nov. 



h 



Floerkii Gottsche. Die Lebermoose 



Sud-Georgiens, 450. pi. 6. 1890. Not Jungermannia 

 Web. and Mohr. 



Sterile : plants loosely caespitose or creeping over tufts of 

 Lophocolea rigcns, yellowish-brown ; stems simple or sparingly 



ranched, densely radiculose ; leaves closely imbricated, obliquely 

 inserted, more or less crispate, broadly quadrate; abruptly widen - 

 ln g from the base, not decurrent, cleft one-third or more into 4 

 obtuse, acute or cuspidate lobes, separated by obtuse or lunulate 

 sinuses, postical margin bearing near the base a cluster of 2-5 

 n ne hair-like cilia, each consisting of 2-8 cells, usually in a single 

 JOW ; underleaves divided almost to the base into 2 slender divis- 

 ions, bearing cilia in the lower part ; leaf-cells rather thin-walled 

 J "» distinct trigones, cuticle smooth or nearly so ; gemmae 



isn-brown, borne in chains and forming clusters on the te< 

 e upper leaves, angular, composed of 1 or 2 cells. 



red- 

 teeth of 



j btems -5-1 cm. long, 0.35 mm. in diameter; leaves 1.55 mm. 



j° n g, 1.20 mm. wide ; underleaves 0.55 mm. long, 0.15 mm. wide ; 



eat-cells on margin 15/;, in the middle 19 ft, and at the base 23 /i 



diameter; gemmae 15 ft in diameter. [Plate 346, figs. 1-7.] 



Lapotaia. 



The present species is an antarctic representative of the barbatae- 



gf oup of the genus Jungermannia, a group of closely allied plants, 



lc h forms a most conspicuous feature of the hepatic floras of 



n °rthern and arctic regions. The presence of basal cilia on the 



lea 



/. lycopodioidcs and/. 



