118 



BRACHIOPODA. 



Fig. 26. Thecidium Mediterraneum. 



Fi^. 26. — Interior ot the dorsal valve, from a specimen in the cabinet of Thomas 

 Davidson, Esq. 



Thecidea (radiata), Defr. in Fer. Tabl. Syst. 38, 1821. 



Blainv. Man. Malac. 516. 629, 1825; Diet. Sci. Nat. liii. 

 p. 434, 1828. 



Risso, Eiirop. Merid. 393, 1826. 

 Thecidium, G. B. Sowerhy, Gen. xx. 1844 ; Tkes, Conch, vii. 1846. 

 Terebratula, Faiijas, Mont St. Pierre, t. 27. f. 8. 

 Terebratula, sp., Lamk. Hist. 



1. Thecidium Mediterraneum. 



Shell small, ])ale yellow, smooth, subquadrate, slightly bilobed 

 in front, attached by the produced and pointed beak ; hinge-area 

 triangular, smooth ; margins thickened and granidated inter- 

 nally ; brachial septum 3-lobed; loop rudimentary, 4-lobed. 

 Lon. 5, lat. 4J lines (fig. 26). 



Thecidea Mediterranea, Blainv. Man. Malac. 629, 1825; Diet. 

 Sci. Nat. liii. p. 434, 1828. 



Desh. in Lamk. Hist. ed. 2. vii. p. 348 ; Ency. Meth. iii. 



p. 135. 

 Eisso, Eur. Merid. iv. f. 183 (bad). 

 Philijjpi, Moll. Sicil. i. p. 99. t. 6. f. 1/ ; ii. p. 70. 

 Dav. Ann. Nat. Hist. 1852, p. 374. 

 Thecidium Mediterraneum, Sow. Gen. f. 6, 7 ; Thes. Conch, vii. 



p. 371. t. 73. f. 30-32. 

 Thecidea testudinaria, Michelotti, Brach. p. 5 ; Pre'c. Faun. Mice. 



pi. 2. f. 26. 

 Thecidffia spondylea, Scacchi, Cat. 8. f. 7-10. 

 Hab. MediteiTanean, attached to corals. 

 Fossil. Miocene. Turin. 



