112 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



LOXOPARIA OBLIQUA Rasetti, new species 



Plate 3, figures 7-9 



Available material. — Three cranidia preserved in limestone. 



Description. — The generic description and the illustrations present 

 all the observable characters of the species. The axial and border fur- 

 rows are shallow on the outer surface. The occipital ring has a subtri- 

 angular shape, extending into a broad-based, short spine. Surface of 

 test perfectly smooth. Length of largest cranidium 7 mm. 



Occurrence. — Red beds at the base of the Nolichucky {Cedaria 

 zone) at locality end/ 1. 



73;/)^.?.— Holotype : U.S.N.M. 144727. Paratypes: U.S.N.M. 144- 

 728. 



UNDETERMINED TRILOBITES 



Undetermined Cranidium No. 1 

 Plate 8, figure 29 



Known from a single, incomplete specimen. Glabella large, rising 

 well above the cheeks, almost straight-sided, strongly tapered, rounded 

 in front. Occipital furrow deep and straight ; occipital ring short (sag.), 

 extended into an uptilted spine of unknown length. Posterior glabellar 

 furrows fairly deep, bifurcated, with the shorter anterior branch trans- 

 verse, the longer posterior branch turning backward. Two other pairs 

 of lateral furrows short, the anteriormost one very shallow. Preglabel- 

 lar field almost vanishing medially ; border slightly convex, not greatly 

 arched transversely. Palpebral area and lobe not preserved. Incom- 

 plete posterior area deeply furrowed, the furrow turning forward in 

 the distal part. Surface covered with medium-sized granules. Length 

 of cranidium, exclusive of occipital spine, 4 mm. 



Although this trilobite cannot be referred to any described genus, 

 the incomplete material does not warrant a new name. Possibly the 

 nearest known forms are certain species of Genevievella. 



Occurrence. — Uppermost beds of the lower limestone member of 

 Nolichucky {Cr e pic ephalus zone) at locality cnn/3. 



Disposition of material. — Figured specimen: U.S.N.M. 144729. 



Undetermined Cranidium No. 2 

 Plate 8, figure 19 



Known from a single, incomplete specimen. Glabella very convex, 

 defined by a deep axial furrow, strongly tapered to a pointed anterior 

 end which is somewhat truncate. Surface of glabella mostly broken off ; 

 lateral furrows, if present, must have been very shallow. Occipital fur- 



