532 Systematic Paleontology 



Klcedkxia sussexexsis (Weller) 

 Plate XCVII, Figs. 14, 15 



Beyrichia sussexensis Weller, 1903, Geol. Surv. N. J., Pal., vol. iii, p. 253, pi. 



xxiii, figs. 3 and 4. 

 Klccdenia sussexensis Ulrich and Bassler, 1908, Proc. U. S. Nat. Mus., vol. 



XXXV, p. 301, pi. xxxviii, figs. 19, 20. 



Description. — "Carapace subelliptical in outline; the dorsal margin 

 straight, its length about nine-tenths of the total length of the valves, its 

 extremities angular. Ventral margin gently convex; the anterior and 

 posterior margins both broadly rounded, the posterior extremity being a 

 little higher than the anterior and its margin being nearly straight for a 

 short distance below the postero-dorsal angle. The entire free margin of 

 the valves with a distinct, flattened, marginal border, which is abruptly 

 separated from the body of the valve. The dorsal half of the surface of 

 each valve is divided into three lobes by two deep furrows, which reach to 

 about the middle of the valve. The posterior furrow divides the valve at 

 about the middle of its length and is nearly straight; the anterior furrow 

 lies about halfway between the posterior one and the anterior extremity ; 

 it is a little shorter than tlie other and its lower extremity is slightly bent 

 backward. The two furrows are connected below by an indistinct depres- 

 sion in the valve, partially isolating the middle lobe. The anterior and 

 posterior lobes are connected ventrally. The middle lobe is subglobose and 

 is the most prominent of the three; the posterior lobe is a little more 

 prominent than the anterior. The entire surface, except in the furrows 

 and on the marginal border, is finely papillose. 



" The dimensions of the type specimen are : Length 3 mm. ; height 

 1.8 mm." Weller, 1903. 



Occurrence. — Heldekbekg Formation, Keysee Member. Touoloway. 



Collection. — U. S. National Museum. 



Klcedexia barretti (Weller) 

 Plate XCVII, Fig. 17 



Beyrichia barretti Weller, 1903, Geol. Surv. N. J., Pal., vol. ill, p. 254, pi. xxiii, 



fig. 9. 

 Kladenia 'barretti Ulrich and Bassler, 190S, Proc. U. S. Nat. Mus., vol. xxxv, 



p. 301 (gen. ref.). 



