2(.l-t Til' Ann iii-il II (rii>lo<l'txt. October, 1891 
preceding species. The iiiU'niul (litttTonees are so striking that a 
generic rather than specific separation is suggested. 
Foi'iuntioii itnd lociiliti/: Same as preceding. 
Types iu Dr. C. E. Beecher's collection. 
Beechereila angularis, n. sp. 
I'l.ATK II. KKiS. Hl-12. 
Size of right citlcr: J^ength 1.4") mm.; hight. (1.75 mm.; 
thickness. (1.38 mm. 
Valves oljliquel}- acuminate-ovate, in a side view, triangular in 
cross-section, the dorsal side being nearly straight, with a wide, 
sul)triangular flat or slightly concave back, the posterior third 
semicircular, the anterior margin gently curved and sloping back- 
ward from the pc/inted antero-dorsal extremity into the neatly 
rounded ventral margin. Point of greatest thickness' just 
beneath the dorsal ridge from which the surface slopes with a 
gentle convexity to the free margins. 
The general expression of the only valve of this species seen 
except that it is inequilateral, resembles that of the ventral valve of 
a minute Spirifcra with a wide flat area. The possession of such a 
flattened back recalls B. nirinata, but the relationship canonlj-be 
remote since they difl'er so greatly in all other respects. Nor do 
any of the other species approach B. angularis sufficiently to make 
comparisons either necessar}- or desirable. 
Fiinuiiti'iii iiiid loriditif: Same as preceding. 
Type iu Dr. C. E. Beecher's collection. 
EXri..\XATI0N OF PL.VfE. * 
Beecherella CARix.vr.\, u. sp. 
Fig. 1. Nearly perfect right valve. 
Fig. 2. Interior view of same. 
Fig. 'A. Dorsal view of same. 
Fig. 4. Interior view of a small left valve. 
Beecherella subtumida, n. sp. 
Figs. •■), and 7. Respectively interior, side and dorsal views of aright 
valve. 
Beecherella xavicila, n. sp. 
Fiff. 8. Interior view of a perfect left valve. 
Fig. 9. Interior view of the anterior half of a right valve. 
BeE( IIKRELLA AXGULATA, n. Sp. 
Figs. 10, 11 and 12. Interior, end and dorsal views of a right valve. 
(The dorsal view is too long.) 
Beechekella ov.\ta, n. sp. 
Figs. 13 and 14. Dorsal and side views of the only specimen, a left 
valve, seen. 
Bkecherella subtumida, var., intermedlx. n. var. 
Fig. 15. View of the interior of a right valve. 
Beech KRELLA cristata, n. sp. 
Fiirs. Ifi, 17, 18 and 19. Respectively right side, left side, ventral and 
dorsal views of a perfect carapace. 
* .\U the liKiirn- are f nlari.'»Hl 21) diainftt'rs. 
