52 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 98 



ALOKISTOCARE GLOBATUM, n. sp. 



Plate 12, figs. 10, 11 



Only the one cranidium has been found, and it is not fully typical 

 of the genus. The glabella tapers and is fully two-thirds the length of 

 the cranidium. It lacks glabellar furrows, although faint irregularities 

 occur along the dorsal furrow. The wide, shallow, occipital furrow 

 is nearly interrupted by the slight keel that extends into the occipital 

 ring. The latter has a small node. The dorsal furrow is wide and 

 shallow but clearly defined to a point anterior to the eyes. From that 

 point forward there is a rather unique spreading and coalescence of 

 the glabella into the preglabellar area. The dorsal furrow is traceable 

 entirely around the front of the glabella but is irregular. In other 

 words the anterior part of the glabella fans out and joins the brim in 

 an irregular manner. This feature is rare in ordinary trilobites but is 

 found in such forms as Bailiclla and Harpes. The libragenes are 

 convex, rising abruptly from the dorsal furrow and then sloping down 

 with little curvature at a considerable angle from the eye. The eye 

 is situated well below the level of the dorsal furrow. The eyes are 

 small and occupy about the midpoint of the cranidium. Anterior to 

 the eyes the facial suture diverges slightly. The brim is wide and 

 consists of a wide preglabellar area, which slopes downward, and a 

 narrow rim, which rises to a horizontal position. The preglabellar 

 area is covered by vertical and anastomosing lines, but the rest of the 

 test appears to be smooth. 



Locality 55p. 



Holotype.— U.S.N.M. No. 98546. 



ALOKISTOCARELLA Resser, 1938 

 ALOKISTOCARELLA OCCIDENS, n. sp. 



Plate 2, figs. 13, 14 



Two cranidia represent Alokistocarella. The species is character- 

 ized by a rather large subcorneal glabella, truncated in front. Includ- 

 ing the occipital ring it is about two-thirds the cranidial length. Three 

 pairs of glabellar furrows show faintly. The fixigenes opposite the 

 eyes are about half the width of the glabella at the same point. The 

 brim is wide, concave, and is turned up rather abruptly but lacks a 

 rim. The brim is faintly striated vertically and the surface of the 

 holotype is punctate. 



Locality 54s. 



Holotype.— U.S.N.M. No. 98547. 



