DESCRirTION OF THE SPECIES. 241 



Localities: Fredericksburg; 72(1 mile-post, near Brooke. 



At the latter place the plant is rare, but at the former it is quite com- 

 mon, being in one layer one of the most common plants. It occurs here 

 sometimes in very large specimens. The fine form figured in PI. CXIV, 

 Fig. 1, is a part of a specimen which, although still only a fragment of a 

 branch, was considerably larger than the part figured. Most of the large 

 specimens have suffered so much from the action of water before entomb- 

 ment that they are decorticated and have lost their leaves. 



Athrotaxopsis tenuicaulis, sp. nov. 



Plate CXIV, Figs. 4, 5 ; Plate CXV, Fig. 4 ; Plate CXVI, Fig. fi ; Plate CXVII, Fig. 2. 



Small trees or shrubs, with comparatively very slender stems, branch- 

 ing copiously and mostly at short intervals; branches alternate and in the 

 same plane, ultimate branches short, slender, thread-like, with an ultimate 

 branch terminating the penultimate branches, the ultimate twigs simple or 

 rarely dichotomous; leaves arranged spirally, close appressed, keeled 

 slightly at the tips, elliptical to rhombic in shape, acute. 



Localities: Fishing hut above Dutch Gap Canal; Fredericksburg. 



At the latter place the plant is rare, while it is not uncommon at the 

 former. This form is characterized by the narrowness and the shortness of 

 the ultimate branches. They are usually numerous and closely placed. 

 The leaves are rarely preserved, and they sometimes show a faint keel at 

 their tips, as in PI. CXVII, Fig. •2^ 



Athkotaxopsis expansa, sp. nov. 



Plate CXIII, Figs. 5, (i ; Plate CXV, Fig. 2 ; Plate CXVI, Fig. 5 ; Plate CXVII, Fig. 6 ; Plate CXXXV 



Figs. 15, 18, 22 (cones). 



Trees or shrubs, the leafy branches being very long and with slender 

 woody axes, spreading widely, sparingly branched, branches in one plane ; 

 the ultimate twigs alternate, remote, very long and cord-like, probably 

 ])en(lulous, unbranched or rarely dichotomous ; leaves quite thick (com- 

 paratively), keeled, elliptical to subrhonibic, acute to obtuse, the lateral 

 ones often rather obtuse and divergent from the stem, cones oblong, some- 

 times from distortion made more or less globular in form, comparatively 



MOM XV — 16 



