60 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 148 



ry^^^.—Holotype: U.S.N.M. 62826. Plesiotypes: U.S.N.M. 

 144603^. 



Family KINGSTONIIDAE Kobayashi, 1933 



Genus KINGSTONIA Walcott, 1924 



Type species. — Kingstonia apion Walcott. 



KINGSTONIA INFLATA Resser 



Plate 8, figures 21-28 



Kingstonia inflata Resser, 1938a, p. 84, pi. 12, figs. 5, 6. 

 Kingstonia rotundata Resser, 1938a, p. 83, pi. 12, figs. 9-10. 



Available material. — The two names represent the same species, 

 described from the appearance of the outer surface and from internal 

 impressions respectively. Abundant material of this exceedingly com- 

 mon form allows a more complete description. 



Description. — Cranidium very convex in both directions, barely 

 showing a trace of the axial furrow on outer surface. Glabella defined 

 on internal impressions, straight-sided, slightly tapered, very wide in 

 proportion to cranidial width. Anterior border indicated only by its 

 terraced surface, without change in slope from glabella and preglabellar 

 field. Palpebral lobes almost indistinct; facial suture showing little 

 change of direction before and after palpebral lobes in dorsal view; 

 anterior sections strongly convergent ; posterior section gently convex 

 outward, defining a stout posterior area ; posterior angles of cranidium 

 obtuse. Posterior outline rounded in axial portion, with indentations 

 corresponding to the axial furrow; convex along the margin of the 

 posterior area. 



Pygidium with axis occupying less than one-third of the maximum 

 width, well defined anteriorly but merging with the pleural region 

 posteriorly, not tapered. Pleural lobes increasingly convex toward the 

 margin. Facet at anterior angles very distinct. Five axial rings and 



3 or 4 broad, shallow pleural furrows visible on interior impressions. 

 Length of largest cranidia 4.5 mm. 



Several cranidia, one of which is figured, show through the dark 

 surface of the test a regular pattern of yellow stains that presumably 

 represent muscle attachments on the inner surface. 



Occurrence. — Type localities for K. inflata are U.S.N.M. 121a, 125, 



4 miles NE. of Rogersville. Type locality for K. rotundata is U.S.N.M. 

 123b, near Rogersville. Found by the writer throughout the lower 

 limestone member of the Nolichucky (Crepicephalus zone) in the 

 Rogersville area (Iocs, cnk/1, cnk/3, cnm/2, cnm/3, cnn/1, cnn/3). 



Types.— Cotypes of K. inflata: U.S.N.M. 94934, 94953. Cotypes 

 K. rotundata: U.S.N.M. 94935. Plesiotypes : U.S.N.M. 144605-7. 



