NO. 3 UPPER CAMBRIAN TRILOBITE FAUNAS — RASETTI 105 



Genus COENASPIS Resser, 1938 



Type species. — Coenaspis spectabilis Resser. 



COENASPIS SPECTABILIS Resser 



Plate 5, figures 1-3 



Coenaspis spectabilis Resser, 1938a, p. 69, pi. 16, fig. 9. 



The only new information about this rare trilobite is its stratigraphic 

 position. 



Occurrence. — Beds of the lower Cedaria zone at the top of the 

 Maryville formation. The type locality is U.S.N.M. 123a, near Rogers- 

 ville. One cranidium was collected by the writer at locality cnc/3, 

 close to or identical with the preceding. 



Types.— Uolotype : U.S.N.M. 94978. 



Genus HAWKINSIA Rasetti, new genus 



Description. — Very small trilobites. Cranidium subtrapezoidal, 

 rather convex. Glabella moderately convex, defined by deep axial 

 furrow, tapered, with short, shallow lateral furrows. Occipital furrow 

 deep, occipital ring simple. Frontal area short (sag.), convex and 

 downsloping, barely differentiated into preglabellar field and border. 

 Ocular ridges well marked, subtransverse, curved. Palpebral area 

 convex, as wide as glabella ; palpebral lobes small and inconspicuous, 

 situated far in advance of glabellar midpoint. Posterior area large, 

 deeply furrowed. Facial sutures showing little change of direction 

 between anterior and posterior section in dorsal view ; in lateral view 

 there is a marked angle. Anterior sections convergent, curving inward, 

 rounding off the anterior cranidial outline. Posterior section first run- 

 ning outward and backward, gradually curving backward and finally 

 slightly inward, giving the cranidium a sharp posterolateral angle. 



Type species. — Hawkinsia minuta Rasetti, n. sp. 



Discussion. — Although the known specimens of the type species are 

 quite small, the fact that they are all about the same size suggests that 

 they are not immature. In any case, Hazvkinsia could not be the im- 

 mature form of any of the larger trilobites known from the same beds. 

 No plausible affinities of the genus can be suggested. The name is 

 derived from Hawkins County, where the type species occurs. 



Occurrence. — Upper Cambrian {Cedaria zone) of the southern 

 Appalachians. 



HAWKINSIA MINUTA Rasetti, new species 



Plate 3, figures 22-25 



Available material. — Several cranidia preserved in limestone. 

 Description. — The generic description includes most of the known 



