PLATE X 
Figs. 1, 2. Trigonia goodellii Cragin (p. 58). 
Figs. :\-i\. Trigonia peoscabba sp. n. (p. 60). 
Fig. 7. Trigonia pk.i.si ria i.\ sp. n. <p. r.l >. 
Figs. 8 11. Trigonia munita sp. n. (p. G2). 
i:;u 
