62 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



A few cranidia and more numerous free cheeks were collected from 

 the lower limestone member of the Nolichucky {Crepicephalus zone) 

 at localities cnk/1, cnk/3, cnm/2. 



Types. — Holotype of D. appalachia (from loc. U.S.N.M. 22z, near 

 Greendale, Va.) : U.S.N.M. 94875. Plesiotypes: U.S.N.M. 144694. 



Genus MENOMONIA Walcott, 1916 



Type species. — Conocephalites calymenoides Whitfield. 



MENOMONIA PROMINENS Resser 



Plate 5, figures 14-17 



Menomonia prominens Resser, 1938a, p. 88, pi. 9, figs. 42, 43. 

 Dresbachia speciosa Resser, 1938a, p. 75, pi. 9, figs. 28, 29. 



Available material. — Resser's two names were based on the cranidia 

 and free cheeks of the same species. Additional material allows a more 

 complete description. 



Description. — Glabella straight-sided, tapered, rounded in front, 

 with 2 pairs of short lateral furrows ; occipital furrow well impressed, 

 occipital ring rounded. Preglabellar field slightly arched transversely, 

 fairly long (sag.) ; border upturned, arched transversely. Palpebral 

 lobes with their midpoint at the level of the anterior end of the glabella, 

 strongly upsloping, rising higher than glabella. Posterior area tapered, 

 large, strongly downsloping and hence giving strong relief to the 

 cranidium, deeply furrowed ; posterior cranidial margin curving back- 

 ward. Free cheek with border well defined only anteriorly, almost 

 parallel-sided, well rounded at the genal angle. The surface characters 

 are described as they appear on internal impressions, as none of the 

 specimens preserve the test. Large tubercles on the glabella are ar- 

 ranged more or less regularly in 4—5 pairs. Tubercles of the same size 

 are irregularly scattered on the fixed cheeks, decreasing in number 

 toward the distal end of the posterior area. The tubercles are more 

 crowded on the anterior border. The free cheeks have larger granules 

 near the eye and finer granules distally. The largest cranidium has a 

 length of 4.8 mm. 



Occurrence. — Type locality is U.S.N.M, 27d; red beds at the base 

 of the Nolichucky E. of Rogersville (Cedaria zone). Collected by the 

 author at the same locality (cnd/1) . 



Types. — Holotype and paratypes: U.S.N.M. 94857. Plesiotypes: 

 U.S.N.M. 144695. 



MENOMONIA TUBERCULATA Rasetti, new species 



Plate 2, figures 19-24 



Available material. — Several cranidia and free cheeks in limestone. 

 Description. — Glabella and occipital ring similar to preceding spc 



