12 BRITISH TERTIARY BRACIIIOPODA. 



T. substriata has all the characters of the genus under notice, its apophysis being annular, 

 and entirely similar to that of the type species Terebratulina caput serpentis. In the 

 Cretaceous period this genus appears to have most abounded, and has lived through the 

 Tertiary period up to the present day. It is found recent in many localities. 



5. Terebratulina caput-serpentis, Linnaeus, Sp. Plate I, figs. 3, 4, 5, 6 (recent) ; 



14, 15 (fossil). 



Anomia caput-serpentis, Linn. Syst. Nat., 12 (non ed. 10), p. 1153 ; Fauna Suecica, 



ed. 2, p. 521 ; Acta Upsaliens, 1773, vol. i, p. 41, pi. 5, 

 %• 3. 



— _ Born. Mus. Cses. Vind., p. 119. 



— — Chimn. Conch. Cab., vol.viii, p. 103, pi. lxxviii, fig. 712, 1785. 



— — Billw. Recent Shells, vol. i, p. 293; Index Testaceolog., 



pi. ii, fig. 22. 



— retusa, Linn. Syst. Nat., ed. 12, p. 1151 ; Fauna Suecica, ed. 2, p. 521. 



— — Billw. Recent Shells, vol. i, p. 292. 



— pubescens, Linn. Syst. Nat., ed. 12, p. 1153. 



Anomia pubescens, Schrdter. Eintest. Conch., vol. iii, p. 397, pi. ix, fig. 10. 



— — Billw. Recent Shells, vol. i, p. 293; Index Testaceolog. , pi. ii, fig. 20. 

 Terebratula pubescens, Miiller. Zool. Danic Prodromus, p. 449, No. 3007. 



— caput-serpentis, Lam. (non Retsius.) Anim. sans Vert. (ed. Desh.) 



vol. vii, p. 332. 



— — Sow. Gen. of Shells, Tereb., fig. 2. 



— — Philippi. Moll. Sicil., vol. i, p. 95, pi. vi, fig. 5 ; and 



vol. ii, p. 66. 



— — Reeve. Conch. Systemat., pi. cxxvi, fig. 2. 



— — Sow. Thesaurus Conch., vol. i, pi. lxviii, figs. 1 — 4 ; 



and pi. lxxii, fig. 116. 



— — Forbes and Hanley. British Mollusca, pi. lvi, figs. 1 — 4. 



— costata, Lowe. Zoologic. Journal, vol. ii, p. 105, pi. i, fig. 89. 



— aurita, Fleming. Phil. Zool., vol. ii, p. 498, pi. iv, fig. 5 ; British 



Animals, p. 369 ; British Marine Conch., p. 127. 



— — Brown. Illust. Conch. G. B., p. 68. 



— grevillei, S. Wood. Cat. of Crag Shells, Mag. Nat. Hist., vol. v, 



p. 253, Dec, 1840. 

 Terebratulina caput-serpentis, B'Orbigny. 1847. Comptes Rendus de l'Academie 



des Sciences et Pal. Franc. Ter. Cretace's, vol. iv, 

 p. 58. 



Diagnosis. Shell ovate, rounded or pentagonal, longer than wide, variable in appear- 

 ance at different ages ; valves almost equally convex, beak produced and obliquely 

 truncated by a moderately sized foramen, principally excavated out of the substance of the 

 beak, completed by the umbo and by two small, rudimentary, lateral, deltideal plates ; no 

 distinct cardinal area or beak ridges; smaller valve convex, with two more or less 

 developed auricles, much expanded in the young, smaller and more oblique in the adult 



