BRACHIOPODA. 
36 o 
Surface covered with elongate pustules, some of them coarse, but the greater 
number quite fine. 
Height of an average specimen, 5 mm. ; width and length, 6 mm. 
Waverly group. Richfield^ Ohio. 
Sykingothyris Missouri, sp. nov. 
PLATE XXXIX, FIGS. 29-31. 
Shell small, cyrtiniform ; cardinal area high, slightly incurved toward the 
apex; lateral cardinal margin broadly rounded, rendering the definition of the 
area quite obscure. Median fold and sinus neither wide nor highly developed. 
Surface of both smooth. Each lateral slope with five or six low plications. 
Interiorly the pedicle-valve bears strong divergent dental lamellse which are 
attached to the surface of the valve for fully one-third of its length. There is no 
median septum. The transverse delthyrial plate is thin and is developed into 
a delicate but distinct tube. Shell substance highly punctate on the inner 
laminae. Height of original specimen, 13 mm. ; cardinal width, 18 mm.; 
length, 15 mm. 
Choteau limestone. Chateau Springs, Missouri. 
Ambocielia spinosa, sp. nov. 
PLATE XXXIX, FIGS. 16-18. 
Shell of rather large size, hinge-line straight, equaling the full diameter of the 
valve. Brachial valve depressed convex in the umbonal region, concave ante¬ 
riorly, with upturned margins. Medially there is a low and indistinct elevation 
which disappears toward the front. Pedicle-valve not known. Surface bearing 
faint traces of concentric lines and covered with numerous elongate depressions 
which were probably bases of insertion of epidermal spinules. 
Length of original specimen, 7 mm. ; width in the hinge, 9 mm. 
Hamilton shales. Livonia Salt Shaft, Livingston county, N, Y. 
