PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 527 
Genus KULLERVO Opik 
Kullervo Orix, Acta et Comment. Univ. Tartu, ser. A, vol. 23, No. 3, p. 70, 1932; idem, ser. A, 
vol, 26, No. 3, p. 162, 1934. 
KULLERVO ORNATA Cooper, new species 
Plate 80, A, figures 1-6 
Shell small, wider than long with hemipyramidal pedicle valve. Surface multi- 
costellate, the costellae crossed by elevated concentric plaits (lamellae). On the 
brachial valve the posterolateral areas are conspicuously marked by the concen- 
tric lines. Pedicle valve with broad shallow sulcus extending from beak to an- 
terior margin; flanks rounded. Areas between flanks and posterior margin con- 
cave. Spondylium broad and shallow with the characteristic median depression 
flanked by narrow, elevated tracks. Median septum short. 
Brachial valve slightly concave in the posterior half but slightly convex in the 
anterior half. Sulcus widening rapidly from the beak to the anterior margin 
where it occupies about one-third the width. Anterolateral flanks gently con- 
vex; posterolateral areas flattened. Brachial interior with strong anteriorly 
widening median ridge corresponding to the sulcus. Median ridge much elevated 
and thickened anteriorly. Cardinalia much thickened. 
Measurements in mm.—Holotype, length 2.3, width 3.8, hinge width 4.5, thick- 
ness 2.6. 
Types.—Holotype: 110150a; figured paratype: 110150b; unfigured paratype: 
I1O150c. 
Horizon and locality.—Effna-Rich Valley formations in Virginia: At Porter- 
field Quarry, 5 miles east of Saltville, Maccrady (T.V.A. 218-NW) Quadrangle. 
Discussion.—This species occurs with K. parva but is easily distinguished 
by the differences in profile and ornamentation. The brachial valve of K. ornata 
is concave in the posterior half but slightly convex in the anterior half and gives 
the impression of a nearly flat valve, while the brachial valve of K. parva is 
convex. The ornamentation of the latter consists of costellae of unequal size 
but with subordinate concentric ornament. On the other hand K. ornata has 
strong concentric ornamentation as well as costellae, and on the brachial valve 
the concentric ornamentation dominates the posterolateral areas. 
KULLERVO PARVA Cooper, new species 
Plate 80, B, figures 7-11 
Small, the largest specimen in the collection attaining a width of slightly more 
than 4 inch. Wider than long with acute cardinal extremities in the adult, but 
in young specimens the extremities are drawn into sharp ears. Pedicle valve hemi- 
pyramidal in lateral profile with a fairly prominent median sulcus extending 
from the beak to the anterior margin. Flanks bounding the sulcus narrowly 
rounded and the area to the cardinal extremities slightly concave. Spondylium 
large and shallow with a fairly deep median groove bordered by flat shelves on 
