BRACHIOPODA. 
91 
13. Terebratella Labradorensis. B.M. 
Shell ovate, produced at the beak, w'hitisli, with obscure radia- 
ting ribs ; dorsal valve nearly orbicular, flattish ; ventral valve 
with a prominent beak, perforated by a large, entire foramen ; 
deltidium rather large ; loop elongated, doubly attached. Lon. 7, 
lat. 6, alt. bnes. 
Terebratula Labradorensis, G. Sowerby, Thes. Conch, vu. p. 362. 
t. 71. f 89, 90. 
Terebratella Labradorensis, Dav. Ann. Nat. Hist. 1852, p. 368. 
Hab. Labrador (Goodsir). 
14. Terebratella Spitzbergensis. 
Shell small, oval, elongated, smooth, pale horn-colour; valves 
almost equally convex, margins even ; dorsal valve slightly de- 
pressed in front; beak produced, recmwed, obscm-ely keeled; 
foramen moderate, incomplete ; deltidium of two distinct elon- 
gated plates ; loop elongated, reflected, attached near the extre- 
mity of the prominent central septum. Lon. 4, lat. 3, alt. 2 
bnes. 
Terebratella Spitzbergensis, Davidson, 1852, Proc. Zool. Soc. 
Hab. Spitzbergen. (Mus. Cuming.) 
15. Terebratella pusilla. 
Shell small, thin, nearly eireular, depressed, smooth ; area 
large ; foramen large, ineomplete ; deltidia rudimentary. Lon. 
and lat. 24, alt. 1 bne. 
Terebratula pusilla, Philippi, 1844, Foss. Tert. Allem. p. 17. pi. 2. 
f. 15. 
Terebratella pusilla, D’Orb. Prod. ui. p. 134. 
Fossil. Miocene. Cassel. 
16. Terebratella Sayi. B.M. 
Shell orbicular, depressed, ornamented with about eleven ra- 
diating plaits, crossed by a few conspicuous lines of growth near 
the mai’gin ; plaits strong, sometimes plicated near the edge ; 
dorsal valve rather flat ; ventral convex; beak scarcely prominent; 
area small and flat ; foramen small, incomplete ; deltidium rudi- 
mentary. Lon. 9, lat. 9, alt. 5 lines. 
Terebratula Sayi, Morton, 1829, Journ. Philad. p. 76. pi. 3. f. 5, 6 ; 
1834, Syn. Cret. Group, p. 7L pb 3. f. 3, 4. 
Terebratula plicata. Say, 1830, Amer. Journ. ii. p. 43. 
Terebratella plicata, D’Orb. Prod. u. p. -259. 
Fossil. Chalk. New Jersey, U.S. 
