BRACIIIOI'ODA. 107 



Ti'rcl)ratula nana, M'ibisfer, Bair. p. AH. 

 Jiraiiii, lidir. p. 11. 

 Hnmcr, Xonld. Ool. p. 52. t. 2. f. 20. 

 Broun, liuUw.y). 1242. 



Fossil. Oxford Clay. Havaria. 



11. .Mi;(;i,i£Li.v ? Dkslo.ngch.v.mi'su. 



Shell smaW, oval, rather depressed, covered with minute tiihii- 

 lar a.sperities, between which the punctations are visible ; mar- 

 gins even ; front trnncated ; ))eak prominent ; foramen moderate, 

 incomplete; deltidia separate. Lon. 3J, lat. li, alt. li lines. 



Terebratula Deslong:chamj)sii, Davidson, June 1850, Ann. Nat. 

 Hist. pi. 15. f. (i. 



Fossil. Lias. Normandy. 



12. Megerlia? Hippoi'us. B.M. 



Shell ovate or rounded, inflated, smooth ; valves unequal, the 

 ventral larjrest, ventricose, with a short recurved umljo ; foramen 

 small; deltidium triangular; dorsal valve convex, with a deep 

 medio-longitudinal depression. Lou. 14, lat. 14, alt. 10 lines. 



Terebratula hippo])us, Roemer, 1841, Kreid. p. 114. t. 16. f. 28. 



lyOrh, Ter. Cre't. iv. p. 85. t. 508. f. 12-18. 



Geinitz, Kreid. p. SJ. 

 Terebratula resupinata, Pusch, Polens Pal. p. 23. t. 4. f, 6 (not 



Sow.). 



Fossil. Neocomian ; Chalk. France ; Belgium. 



See also Terebratula irregularis, Blainv. D. S. N. liii. 140=Tere- 

 bratula ostracea, Blainv. D. S. N. liii. 146. 



9. MORRISIA. 



Shell with a large foramen, encroaching equally on both valves ; 

 ventral valve with a small, straight area; looj) not reflected, 

 united to a small forked process in the centre of the valve; 

 structure coarsely punctate (fig. 18). 



Animal with sigmoid arms, destitute of spiral termination 



(%• 17). 



Momsia (appressa), Dav. 1852, Ann. Nat. Hist. p. 371. 

 Ortbis, sp., Philippi, 1844, Moll. Sicil. ii. p. G9. 



