Silurian.] PALZONTOLOGY OF VICTORIA. [ Graptolites. 
pyriform or cordate vesicle exactly as in the Victorian ones. The 
widest ovate part in large compressed specimens sometimes nearly 
2 lines wide. Fragments of this species are easily distinguished 
from D. pristis by the much closer and narrower cell tubes ; the 
oval wider portion near the base is never found in that species ; it 
is not invariably in this. 
Extremely abundant of large size in the black Llandeilo flags of 
B’ 29. Common of large size in the slates of (W. L. 8. 1). 
EXPLANATION OF FIGURES, 
Plate XX.—Fig. 6, average specimen, natural size, showing the stem slightly wider a little 
above the base than at distal end, with the axis extending beyond the cells above, natural size. 
Fig. 6a, portion of ditto magnified, 
Pratt XX., Fie. 2. 
CLADOGRAPSUS RAMOSUS (Hatz sp.). 
[Genus CLADOGRAPSUS (Gernirz Pars). Stem simple below, with two rows of cells 
and midrib as in Diplograpsus; dividing above into branches with one row of cells only ; cells 
excavated in the margin as in Climacograptus; without distinct tubes, ] 
DescrrpTion.—Simple, double-celled, basal portion of stem about 7 lines lone 
and 1 line wide, above which is a dichotomous division at about 35° into 2 equal 
branches upwards of 2 inches in length and 2 of a line wide, with 1 row of cells 
on outer edge; from upper angle of one cell to upper angle of the next is about 
? the width of the branch, and about } the width of the basal stem, or scarcely 5 in 
2 lines; the wide spaces between the cells, with a straight edge parallel to the axis ; 
inner edge of branch straight, smooth, thickened. 
REFERENCE.— Graptolites ramosus (Hall), Pal. N. Y., v. 1., p. 27, t. 73, fig. 3. 
Climacograptus (Dicranograptus) ramosus, id. Grap. Can. t. A, figs. 18-21. 
I think, in justice to Professor Geinitz, that the genus Clado- 
grapsus should be adopted for this species and others agreeing with 
it in having a simple basal stem with two rows of cells, dividing 
subsequently into branches, because, in his work “ Die Grapto- 
lithen,” p. 29, he defines the genus Cladograpsus, dividing it into 
two well distinguished groups. The first of these, his group (a), I 
think should bear the name Cladograpsus, and of this he names 
C. ramosus as the first species. His second group (6) is identical 
[ 33 ] E 
