84 R. R. GURLEY 
Desmograptus devonicus Gurley, sp. nov. 
(Dictyonema cadens Hall, 1865, Can. Org. Rem., Dec. 2, Pp. 58; momen 
nudum). 
Polypary very irregular in its mode of growth; scarcely a true dissepi- 
ment present. Branches dividing and re-fusing irregularly, leaving round- 
elliptic or round-quadrangular (the prevailing type) meshes. The irregularity 
renders an accurate count of the branches difficult, but there seem to be about 
12-15 in 25™™". The thickness varies considerably, though most of the 
branches measure 1™™”, or nearly that. Longitudinally, there are about six or 
seven meshes in 25™™, 
Horizon and locality.—Devonian (Hamilton formation), Moscow, N. Y. 
DENDROGRAPTUS HALL, 1862. 
Rep. Geol, Surv., Wisc., I., p. 21. Type, D. hallzanus (Prout). 
Dendrograptus unilateralis Gurley, sp. nov. 
Portion of polypary seen, 35™ in length, by 12™" in breadth. Branches 
in the single specimen seen, diverging mostly (entirely?) to one side, whence 
results a one-sided appearance; varying in thickness from 0.25™™ to 0.50™™, 
mostly approaching the latter size; given off at rather distant intervals, at a 
variable angle (roughly approximating 60°), very soon curving toward or into 
parallelism with the parent stem. Theca unknown. 
The specimen consists of a slightly weathered, flattened film. Obscure 
indications of thecaze were seen, but they were too obscure to permit’ of 
detailed description. 
Horizon and locality.—Upper Dicellograpsus zone, Magog, Canada. 
Dendrograptus arundinaceus (Hall), 1847." 
Graptolithus arundinaceus, Pal. N. Y., I., Plate LX XIV. Fig. 8. 
No description of this species has been published. Hall’s figure gives as 
much information as would a description of the same specimen, which, of 
course, is a mere fragment. I was able, however, to make out the distinctness 
from it of the Dendrograpti subsequently published. 
Horizon and locality.—The type specimen (the only one) in the American. 
Museum of Natural History, New York City, was collected from the Utica 
shale, at Turin, Lewis county, N. Y. 
Dendograptus, cf. serpens Hopkinson. 
Quart. Jour. Geol. Soc., London, XX XI1., 1875, p. 665, Plate XX XVII, Fig. 3 
A single specimen referable to this genus in the Summit, Nevada, collec- 
tion seems most nearly related to Hopkinson’s species. It consists of an 
t Overlooked entirely by cataloguers, which is not surprising considering its entire 
absence from both text and index. 
