DRACHIOPODA. \\U 



2. TnKciDH'M Wktukkkli.i. R.M. 



SAp// soinewhnt ])eutiifj<)iml, slifrhtly indented in front, sinootli, 

 attaclu'd I)V tlic l)iiik (ir w liole snrl'ace of tlie ventral valve ; liinfre- 

 area narrow ; deltidinin larj^e, triani,ndar, elongated ; inti-rior of 

 larj^er valve fnnowed l)y close, granular, loiifritudinal strife; dorsal 

 valve with a single deep enrved siiuis on each side ; cardinal pro- 

 cess larire ; niar''in niinntelv t^rannlated. Lon. hit. 



Thecidea Wetherelli. .Vorm, 1S.51, Ann. Nat. Hist. pi. 14. f. l-li. 

 Dariilsnii, Moii. Cret. Braclt. p. 14. jd. l.f. 1.5-2fi. 



Fossd. Chalk. England (attached to shells and Eehinida;). 



3. TnEciDir.M i'vmili'm. B.M. 



Sfiell nearly circular, free, ornamented with diverj^inp, inter- 

 rupted, granular ribs ; dorsal valve circular, Hat, furnished in- 

 ternally with a broad granidar border ; loop 5-7-lobed, the lobes 

 augmenting regularly from the centre out\var(ls ; central process 

 granulated ; ventral valve with a produced uncinate beak. Lon. 



4. lat. ;i\, alt. 1 line (figs. 24, 2^)). 



Terebratuhtes papillatus, Schlothei}n,\8\3,Min. TascA.vii.p. 113. 



(name only). 

 Terebratula pumda, Valenc. in Lamk. 1819, Hi.it.Nat. 58. 



Dar. Ann. Nat. Hist. June 1S.">(), pi. 14. f. 58 (not Sow). 

 Thecidea riidians. Bronr/n. 1S25, Env. Paris, p. .325. 

 Tht'cidee rayonuante, Def ranee, 1828, Diet. Sci. Nat. liii. p. 434. 



t. 80. f. 1. 

 Thecidea radiata. Desk. Enc. Meth. iii. p. 1035. 

 Lamk. Hist. ed. 2. vii. p. 34(). 

 Go/df. Petr. Germ. p. 289. pi. 161. f. 2. 

 Thecidea papillata, Bronn, 1837, Leth. Geog. p. 633. t. 30. f. 3. 



D'Orb. Ter. Cret. p. 154. pi. 523. f. 18. 

 Thecidea recurvirostra, D'Orb. Ter. Cret. p. 156 (exclud. synon.). 



pi. 523. f. 9-17 ; Prod. ii. p. 260'(not Gerv.). 

 Fossil. Chalk. Belgium ; France. 



4. Thecidium recurvirostre. B.M. 



Shell regular, oval, smooth, or only marked with concentric 

 lines of growth ; free, or attached when young by the extremity 

 of the beak ; beak pointed, thick, rounded and recurved ; del- 

 tidium naiTow, raised ; dorsal valve deeply concave, furnished 

 internally with a wide border, radiately striated ; looj) unsym- 

 metrical, 5-lobed, grooves deep, parallel with the margin. Lon. 

 3, lat. 2, alt. 1^ lines. 



Thecidea recur\irostris, Gerinlle, MSS. 

 Defr. 1828, Diet. Sc. Nat. liii. p. 435. 

 Goldf. Petr. Germ. ii. p. 289. t. 161. f. 3. 



