56 NEW YOkK STATE MUSEUM 



Subgenus caphyra Barrande 

 Remopleurides (Caphyra) linguatus sp. nov. 

 PI. 3, fig. 21-29 

 The heads and pygidia of this species were found abundantly 

 in the black crystalline limestone in association with Ampyx 

 hastatus, etc. and in a few specimens also in the gray crystal- 

 line and reddish gray compact limestone pebbles of Rysedorph 

 hill conglomerate. 



Diagnosis. Granidium transversely elliptic, longest diameter 

 at the posterior fourth; longer diameter to the shorter as 9:8; 

 strongly curved at the sides, rapidly contracting to the base of 

 the frontal lobe, and to the junction with the occipital ring; base 

 of frontal lobe and base of cranidium having about the same 

 width; nearly flat, with a slight broad longitudinal depression 

 in front of the occipital furrow; turning abruptly downward at 

 the base of the frontal lobe; the latter tonguelike, half the 

 length of the entire cranidium, straight in very young specimens, 

 bending downward at an angle of 80° to 90° in mature speci- 

 mens; with straight parallel or sometimes somewhat diverg- 

 ing margins; gently rounded forward. Three pairs of glabellar 

 furrows distinctly indicated by curved, smooth linear depressions 

 extending from near the margin three fourths of the distance 

 to the median longitudinal depression. Palpebral lobes narrow, 

 terminating bulblike posteriorly, encircling the cranidium from 

 the base of the glabellar lobe to the occipital ring. Occipital 

 furrow deep and narrow ; occipital ring slightly convex, depressed 

 below the level of the cranidium, short. Surface of cranidium 

 with very fine, somewhat wavy transverse striae and tubercles; 

 the latter increasing in size toward the lateral and posterior 

 margins; anterior third of occipital furrow smooth with a small 

 central tubercle; behind this two transverse filiform ridges and 

 very large tubercles, obscurely arranged in four transverse rows. 



Eyes large, forming an elongate crescent-shaped, rather high, 

 nearly perpendicular wall with very finely reticulate, depressed 

 convex surface. 



