LOWER HELDERBERG GROUP. 
133 
Asms unknown. 
Column deeply inserted into tlie body, composed of large joints above, 
becoming smaller below. 
\ 
Anomalocystites cornutus (n. s.). 
Plate VII A. Pig. 5-7. 
Body subovoid, longitudinally concavo-convex. Concave side showing two 
basal plates and a part of two basi-angular plates, one large subcentral 
plate with two lateral plates, one irregular one on the upper lefthand 
angle of the large central plate, and a terminal range of small plates. 
Convex side showing three basal plates; the central one hexagonal, 
succeeded by five series of small plates. 
Tentacula or spines, two or more. 
Proboscis ? 
Column composed of large circular joints at the junction with the body, 
and becoming rapidly smaller and pentagonal below. 
All the specimens of this species which have been seen are crushed, and more or 
less distorted and imbedded in stone. The form and structure has been more fully 
understood by comparison with a free specimen of another species from the Oriskany 
sandstone of Maryland. A single specimen shows a column of an inch in length. 
The structure in five different individuals corresponds with that represented upon 
the plate. In one individual there is a projecting spine or tentacle from each side, 
apparently joining the angles at the summit of the convex side : there may have 
been more upon the other parts of the summit. A central node or proboscis ? is seen 
in the same specimen. 
The plates appear to be marked by transverse subimbricating lamellee and fine 
granulate surfaces. No pores, ambulacra, or other openings are visible. 
Fig. 5. The convex side of an individual with a portion of the column attached. 
Fig. 6. The concave side, showing the two arching basal plates, the large central plate, and 
the superior range of plates. 
Fig. 7. A plate enlarged, showing the lamellar structure. 
Fig. 7 a. Diagram illustrating the structure of the body, and the relative position of the 
plates on the two sides. 
Geological position and locality. In the Pentamerus limestone of the Lower 
Helderberg group : Jerusalem hill, Litchfield, Herkimer county. 
