BRACHIOPODA. 
101 
Bouchardia tulipa. 
Fig. 13. Fig. 14. 
Fig. 13. — Interior of dorsal valve : 7 . cardinal process ; p, hinge-plate; 1. loop; 
s. septum. 
Fig-. 14. — Interior of ventral valve: /. foramen; t. teeth; a, adductor scar; , 
p. peduncle scars ; r. retractor scars. 
The great muscular impressions in Producta, which correspond 
to these retractor scars, have been mistaken for points of attach- 
ment of the peduncle. 
1. Bouchardia tulipa. B.M. 
Shell oblong-oval, rather depressed, thick, smooth, pale rose- 
red, with darker rays; margins even; beak rather produced, 
straight ; perforation very small, entire ; hinge-area rather wide ; 
deltidia united ; dorsal valve oval, flattish ; cardinal fulcrum 
(figs. 13, 14). 
Terebratula tulipa, Blainv. Diet. Sci. Nat. liii. 144, 1828. 
Terebratula rosea, Mawe, Introd. Conch, t. . f. 
Sow. Gen. f. 4 ; Thes. Conch, vii. p. 357. t. 71. f. 7‘^-71 . 
Desh. in Lamk. Hixt. ed. 2. vii. p. 350. 
Kinff, Ann. 8f Mag. N. H. xviii. 34. 38. 1846. 
PachjT’hynchus roseus, King, Permian Fossils, p. 70. 
Bouchardia rosea, Davidson, Bull. Soc. Gdol. France, 1849, pi. ] , 
f. 1-6. 
King, Permian Fossils, p. 81. 
Hab. Brazil (Rio, 13 fathoms, J. M'Gillivray). 
7*. WALTONIA? 
Shell oval, smooth, punctate ; valves convex ; margins si- 
nuated ; beak truncated by a large, incomplete foramen ; deltidia 
separate ; loop reduced to two simple lamellfe, furnished witli 
oral processes, and attached to a prominent centi'al septum. 
Waltonia (Valenciennii), Dav. 1850, Ann. Nat. Hist. v. p. 475 ; 
1852, p. 372 . 
