nRAcmopoDA. 17 



1. TERKHRATULA. 



Shell : — Valves convex, foramen complete ; loop short and 

 simple (fij;. 3). 



Terehratuhr with short loops, Davidson, 1852, Ann. Nat. Hist. 



p. 3('A ; Moil. Cret. p. 45. 

 Epithvris (elongata), Kiuff, 184.9, Permian Fossils, 81, 14f) (not 



Ph'Ulips). 

 Terel)ratul{c Jugatac repanda;, part.. Buck, 1834, iiber Terebra- 



teln. 

 Terebratula- carinatae sinuata;, |)art., Buck, I. c. 1834. 

 Terehratulic biplicatae, Qiienst. 18.01, Handb. p. 4/1. 

 Grypiius (vitrea), Megerle, Berl. May. 1811, 64. 



Fig. 3. Terebratula vitrea. 



A. B. 



A. Dorsal valve, showing the small loop. 



B. Dorsal valve with the animal ; the oesophagus passes through the opening of 

 the loop. 



1. Terebratula vitrea. B.M. 



Shell rounded-ovate, slightly truncated in front, ventricose, 

 smooth, translucent, milky, or ])ale horn-colour ; valves nearly 

 equal ; margins even ; beak short, recurved ; foramen small, 

 complete ; deltidium nearly concealed ; loop simple, one-fourth 

 the length of the shell. Lon. 17, lat. 14, alt. 11 lines. 



Anomia terebratula, Linn. S. N. 1153. 



Gmelin, S. N. 3344. 



Da Costa, Elem. 292. t. f>. f. 3. 

 Anomia vitrea, Born. Mus. 119. Vig. 116. 



Gmelin, S. N. 334?. 

 Terebratula viti-ea, Lamk. Syst. A. s. V. 139, 1801 ; E. M. t. 239. 

 f. 1 ; Hist. vi. 245, ed. 2. vii. 329. 



Sow. Thes. Conch, vii. 353. t. /O. f. 56-59. 



Philippi, Moll. Sicil. i. 95. t. 6. f. 6; ii. 66. 



