Hitchcock.] 
122 
| Dec. 19, 
Ornithopus gracilior 
Pletropterna minitans. 
Harpedactylus n.sp. 
Comptichnus n.sp. 
Corvipes lacertoideus. 
Unisuleus minutus 
Bisulcus 
Trisulcus 
Acanthichnus cursorius 
elegans 
gracilis. 
lineans. 
Plesiornis gigauteus, n.sp. 
Trihamus elegans 
Triaenopus leptodactylus. 
Typopus abnormis 
Plesiornis sequalipes. 
Plesiornis n.sp. 
magnus. 
var. trilineans 
var. alatus 
Conopsoides larvalis 
Cochlichnus, two sp. 
Sagittarius, and others. 
Other facts observed have led to a revision of the descriptions 
of Brontozoum approximatum , Plectropterna elegans and Trioenopus 
leptodactylus. 
LOCALITIES IN NEW JERSEY. 
Ichnites have been found at Whitehall, Milford, Plainfield, near 
Boonton, and elsewhere. The finest known slab came from White- 
hall, and was obtained by Prof. George H. Cook for the museum 
at Rutgers College, New Brunswick. The rock is a fine-grained red 
sandstone, well fitted to preserve impressions. The following spe- 
cies have been observed upon it : Tridentipes ingens, Brontozoum 
giganteum , B . minusculum , B. Sillimanium , Grallator formosus , 
G.parallelus , G. cursorius , Anomoepus intermedins , Apatichnus eras - 
sus and Anisiclmus gracilis. 
The first species is shown in a row of five tracks and is the fin- 
est exhibition of this ichnozoan known to me. The B. giganteum 
shows a row of three tracks, the B. minusculum four, and the G. 
formosus seven. The Apatichnus crassus is a new species, based 
upon the illustrations afforded by this slab. The Anomoepus is found 
in a row, and shows the heels of the hind feet and the small five 
toed hands. I have visited the locality and find it capable of yield- 
ing other slabs after suitable excavations. 
Milford. — The most novelties are furnished at Smith Clark’s 
quarry in Milford, which has yielded Grallator parallelus , G. cu- 
neatus, G. gracilis , Chimrceichnus ingens, Polemarchus gigas , At- 
gozoum dispari-digitatum , Otozoum parvum, Unisulcus magnus , 
Sagittarius , and others. Most of the specimens examined are in the 
museum of Lafayette College, Easton, Pennsylvania. It is impos- 
sible to see much at the quarry ; in fact no one knows the layer from 
which most of the above named species came. 
I have referred to the Chimoerichnus two relief tracks of consider- 
able size and representing only one-half of the foot. The front 
