42 
BRACHIOPODA. 
Terebratula diphyoides, D’Orb. 1847, Ter. Cr^t. iv. p. 87. t. 509 ; 
Prod. ii. p. 108. 
Fossil. Neocomian. France. 
91. Terebratula ? QUADRiPLECTA *. B.M- 
Shell pentagonal, with four prominent rounded ribs to each 
valve ; ribs sometimes blending or becoming obsolete ; margins 
strongly sinuated; dorsal valve prominent in the centre, de- 
pressed at the sides, with two subcentral and two remote lateral 
ribs, occasionally a small fifth rib in the mesial furrow, interior 
furnished with a prominent cardinal process having a dental pit 
on each side ; ventral valve with two distinct or blended sub- 
central and two lateral ribs ; beak small, laterally compressed, 
curved, truncated by a minute apical foramen ; area small, flat, 
triangular, bounded by prominent beak-ridges ; deltidium an- 
gular, sunk. Lon. 5, lat. 5, alt. 31 lines. 
Terebratula quadriplecta, Munst. 1841, Beitr. Petref. iv. p. 58. 
pi. 6. f. 9, 10. 
Terebratula quadricostata, Braun, 1841, Id. pi. 9. f. 5. 
Terebratula contraplecta, Braun, 1841, Id. pi. 9. f. 2 ?. 
RhynchoneUa quadriplecta et contraplecta, D’Orb. 1849, Prod. 
i. p. 203 (erroneous). 
Spuigera quadricostata, D’Orb. Id. p. 204. 
Fossil. Trias. St. Cassian, Tyrol. 
92. Terebratula? tricostata. B.M. 
Shell suborbicular, depressed, trilobed, smooth ; dorsal valve 
with a prominent middle lobe bounded by shallow furrows ; ven- 
tral valve with a deep central and obscure lateral furrow ; beak 
small, acute ; foramen minute. Lon. 3, lat. 3, alt. H hne. 
Terebratula tricostata, Miinst. 1841, Beitr. iv. p. 57. pi. 6. f. 7. 
Terebratula tripleeta, Klipstein, 3IS. 
Spirigera tricostata, D’Orb. Prod. i. p. 204. 
Fossil. Trias. Tyrol. 
93. Terebratula? bipartita. B.M. 
Shell oval, smooth, depressed, with a longitudinal furrow in 
the centre of each valve ; front slightly truncated, sides depressed ; 
beak small, prominent, truncated by a small round foramen. 
Lon. 7, lat. 5 lines {Munster). 
* Most of the Triassic and Paleozoic Terebratulse were probably 
furnished with internal spires, and belong to the genera Athyris, M'Coy, 
and Retzia, King. (Woodward, MS.) 
