BRACmorODA. 87 



Fig. 8. Dorsal valve of Terebratella dorsal a. 



1. Terebratella dorsata. B.M. 



Shell broadly ovate, somi-what trilobed, whitish, radiately 

 ridgi'd, the hiteral rid<res more ohhque than the mesial ; margins 

 denticulate ; dorsal valve with a broad and shallow oontral de- 

 pression ; beak short ; foranu'ii very lar<:e, incomplete ; deltidia 

 small, triangular, separate; binge-area large, rather flattened; 

 loop elongated, reflected, attached to a central septum. Lon. 14, 

 lat. 14, alt. 6 lines. 



Anomia dorsata, Gvielin, 1788, S. N. 3348. 



Dilluyii, R. S. i. j). 12!)5. 

 Anomia striata Magellanica, Chemnitz, Conch. Cab. viii. p. 101. 



t. rs. f. 710, 711. 

 Terebratula, Lnmk. E. M. t. 242. f. 1 . 



D'Avila, i. t. 20. f. A. Da Costa, Elem. t. 6. f. /. 

 Terebratula dorsata, Schum. N. S. p. 133. 



Lumk. Hist. ed. 2. vii. p. 331. 



Blainv. Man. Maluc. t. 51. f. 1 ; D. S. N. liii. p. 137, 146. 



Soic. Gen. Shells, f. 3 ; Thes. Conch, viii. p. 346. t. 68. f. 15, 

 Ifi, 17. 



Kitster, Conch. Cab. vii. p. 22. t. 1. f. 17; t. 2. f. 14, 15. 

 Delthyris dorsata. Meiike, Syn. ed. 2. p. 96. 

 Hab. Straits of Magellan. 



2. Terebratella flexuosa. B.M. 



Shell wider than long, somewhat pentagonal, rather gibbous, 

 pale brown, with prominent, bifurcating, radiated ridges ; mar- 

 gins sinuated and denticulated ; dorsal valve with a broad, indi- 

 stinct mesial groove ; ventral valve with a short beak and a wide, 

 flattened hinge-area; foramen large, incomplete; deltidia small, 

 separate; loop elongated, doubly attached. Lon. 15, lat. 16 

 lines. 



Terebratula flexuosa, Kint/, Zool. Journ. v. p. 337. 



G. B. Sow. Thes. Conch, vii. p. 347. t. 69. f. 23, 24. 

 Hab. Straits of Magellan. 



