212 PALEOZOIC PALEONTOLOGY. 
teen thece usually occupy the space of 10 mm.; their free extremities 
are angular; their inclination to the axis is about 45°. 
Remarks.—This is by far the most abundant graptolite at the 
Branchville locality, being the only one which is at all common. 
DIPLOGRAPTUS ANGUSTIFOLIUS (Hall). 
Plate XVI., Figs. 8-9. 
1859 Graptolithus angustifolws Hall, Pal. N. Y., vol. IIL, p. 515, 
figs. 1-2. 
This species resembles the last, but the polypary is narrower, the 
thece are a little further apart, there being about eleven in the space 
of 10 mm., and their outer extremities are rounded. 
LASIOGRAPTUS MUCRONATUS (Hall). 
Plate XVI., Figs. 16-17. 
1847. Graptolithus mucronatus Hall, Pal. N. Y., vol. L., p. 268, pl. 
73, figs. 1 a—d. 
This species resembles Diplograptus foliaceus, but the outer ex- 
tremities of the thece are produced in mucronate appendages. 
CLIMACOGRAPTUS PHYLLOPHORUS Gurley. 
Plate XVI., Figs. 14-15. 
1896. Climacograptus phyllophorus R. R. Gurley, Jour. Geol., vol. 
IV., p. 77, pl. 4, figs. 4-6. 
Description.—‘Polypary gradually widening from distal extremity,, 
attaining its full width in the length of six to eight thece; ventral 
margins above this point parallel. Length, exclusive of proximally | 
prolonged virgula, 10 mm. to 30 mm. (usually about 20 mm.) ; maxi- 
a = ae ee 
