64 
PALEONTOLOGY OF NEW YORK. 
of Clarksville, Albany county; and at Schoharie, Schoharie county. In the 
Corniferous limestone, on Schultz’s Farm, near Clarence, Erie county; Port 
Colborne, Province of Ontario; Falls of the Ohio. Dalmanites (Chasmops) 
anchiops, varieties armatus and sohrinus: Schoharie grit, Albany and Schoharie 
counties. The variety armatus has also been found in the Upper Helderberg 
limestones at Arched Rock, Mackinac, Michigan. 
Dalmanites (Chasmops) Calypso. 
PLATE XI A, FIGS. 19-2-2. 
Dalmania Calypfio, Hall. Descrip. New Species of Fossils, etc., p. 61. 1861. 
Dalmania Calypso, Hall. Fifteenth Kept. N. Y. State Cab. Nat. Hist., p. 89. 1862. 
Dalmanites Calypso, Hall. Illustrations of Devonian Fossils, pi. xiii, tigs. 1, 2. 1876. 
General Form and Proportions. Outline elongate-elliptical, posteriorly sub¬ 
acuminate ; length to width as 2 to 1. 
Surface convex, axially elevated, sub-equally trilobate. 
Cephalon. Outline sub-semi-circular, length to width as 1 to 2. Border thin, 
moderately broad, flattened on the anterior limb, depressed at the sides, and 
produced at the genal angles into conspicuous spines. Surface convex, 
somewhat flattened axially. 
Facial Sutures taking their origin on the lateral margins just in front of the 
genal spines, thence following a direction normal for this genus. Upon the 
free cheeks they lie in a broad, conspicuous sulcus, which unites with the 
sulcus at the base of the eye and becomes obsolete upon the margin. 
Glabella elongate-sub-pentagonal, widest anteriorly; length and width 
equal. Surface gently rounded, depressed above. Anterior or frontal lobe 
large, transversely sub-elliptical or sub-rhomboidal; first pair of lateral 
furrows strong, inclined posteriorly and passing three-fourths the distance 
across the glabella; first and second glabellar lobes coalescing, reniform, ele¬ 
vated at their outer margins; second lateral furrows obsolete except at their 
proximal extremities, where they are represented by two deep depressions 
or pits; third glabellar lobes incoaspicuous, transverse and separated from 
the coalesced first and second lobes by the faint third pair of lateral furrows. 
