DEVONIAN FAUNAS. 387 
STROPHOSTYLUS? sp. undet. 
Plate LIII., Figs. 13-16. 
Among the specimens collected from the Monroe shales of New 
Jersey there are several imperfect and distorted coiled shells, which 
are probably referable to the genus Strophostylus. In none of them 
are the characters sufficiently well-preserved for specific identification, 
and even the generic reference must be considered doubtful. 
ARTHROPODA. 
TRILOBITA. 
HOMALONOTUS DEKAYI (Green). 
1888. Homalonotus Dekayi Hall and Clarke, Pal. N. Y., vol. VILI., 
p. 7, pl. 2, figs. 1-11, pl. 3, figs. 1-5, pl. 4, figs. 1-6, pl. 5, 
figs. 1-10. 
At Sylvester’s Corners a single thoracic segment of a trilobite has 
been found in the Monroe shales, which is evidently a portion of a 
species of Homalonotus, and is probably the common New York 
Hamilton species of the genus, H. dekayt. 
PHACOPS RANA (Green). 
Plate LIII., Fig. 18. 
1888. Phacops rana Hall and Clarke, Pal. N. Y., vol. VIL., p. 19, pl. 
7, figs. 1-11, pl. 8, figs. 1-18, pl. 8 A, 21-33. 
Imperfect and distorted specimens of the head of this species have 
been found in some of the localities of the Monroe shale in New 
Jersey. The species may be recognized by its large and broad glabella 
without lateral furows. The specimen here illustrated is the best 
