48 brachiopoda. 



114. Terebratula Archiaci. 



Shell subcircular, depressed, smooth ; edges sharp ; margins 

 even ; ventral valve rather more convex than dorsal ; beak slightly 

 curved ; foramen apical, minute ; deltidium triangular ; interior 

 of dorsal valve with a cai'dinal process, dental pits, and elongated 

 adductor impressions. Lon. 26, lat. 25, alt. 9^ lines, 



Terebratula Archiaci, Verneuil, 1850, Bull. Soc. Geol. Fr. t. vii. 



p. 40. pi. 2. f. 2. 

 Fossil. Devonian. Asturias. 



115. Terebratula Haimeana. 



Shell cu'cidar, depressed, smooth, with obscm'e lines of growth ; 

 valves nearly equally convex ; margins even ; beak obtuse, late- 

 rally keeled, recuived, truncated by a small round foramen ; del- 

 tidium nearly concealed, sohd. Lon. 28, lat. 30, alt. 16 lines. 



Terebratula Haimeana, Dau. April IS52, Ann. Nat. Hist. t^\. 14. f. 1. 

 Fossil. Devonian. Prussia. 



2. TEREBRATULINA. 



Shell finely striated ; valve auriculate ; beak straight ; delti- 

 dium usually ruthmentary ; foramen incomplete ; loop short, 

 rendered annular by the union of the oral processes (fig. 4). 



Terebratiilsc striatae, Morris, 1846, Joiirn. Geol. Soc. p. 385. 

 Terebratulina(caput-serpentis),D'0r6. 1848,Jnw.Se.]Va^viii.67. 



Dav. 1852, Ann. Nat. Hist. p. 365 ; Mon. Cret. p. 34. 

 Terebratulae annuliferse, Quenstedt, 1851, Handbuch, p. 462. 



Terebratulina caput-serpentis. 



Fig. 4. Fig. 5. 



Fig. 4. — Dorsal valve of a young specimen in which the oral processes are not 

 yet completely develo]ied. 



Fig. 5. — Shell with the animal ; the intestine is seen projecting above the oral 

 aperture and fringe. The asophagus passes through the annular part of the loop. 



