nRAriiini'ODA. 11 



8S. Terebratula trkiuetka. B.M. 



Sfic// tiiiuitruliir, sniootli, di-prosscd, truiionted in front, the 

 anj^U's ]>ro(lucril and rounded ; sidrs nearly straijjlit ; beak obtuse, 

 reeurved, keeled ; foramen moderate, round ; deltidium nearly 

 eoncealed. Lou. 17, lat. in front IS lines. 



Terel)nitula pileus, (Rriif/.) E. M. t. I'll. f. 1. fl, b, c. 



Hrnnn, Index, p. 1245. 

 Terel)rutnla tricjuetra, P^/ r A- ( /j soh, 1 Mil, Org. Re?n. iii. pi. Ifi. f. 8. 



irOrl). Prod. i. p. 'M\. 



Dnr. Ann. Nat. Hist. June 1850, pi. 13. f. 21. 

 Terebratula trianculus, Vnl. 1819, in Lam. An. s. Vert. no. 21. 

 Terebratula nintica, Coftillo, I8.'i0, (Jcixjn. Zool. x.\ii. t. 2. f. 4. 

 Fossil. Kelloway Rockl. France (Gigondas). 



89. Terebratula dii'hya. B.M. 



Shell smooth, triangular, depressed, gibbose at the margins ; 

 when yoimg two-lobed, the lobes coalescing in the adult, leaving 

 a roundish opening uihout 'A lines in diameter) through the cen- 

 tre of both valves ; from this oj)ening a sharp furrow passes to the 

 front margin of each valve ; margins even ; sides slightly hol- 

 lowed ; front indented in the middle ; angles rounded ; beak 

 rounded and recurved; foramen moderate, round ; loop ?. Lon. 

 19, lat. 20, alt. 9 Imes. 



Concha diphya, F. Colonna, \G06, Ecphras. Stirp. 36. 49. 

 Terebratula diphya. Buck, Ueber Terebrateln, p. 88. t. 1. f. 12; 

 Me'm. Hoc. Geo/. France, iii. p. 196. pi. 18. f. 9. 

 Pusch, Polcns Pal. 15. t. 3. f. 13. 

 Dav. Ann. Nat. Hist. June 1850, pi. 13. f. 20. 

 Quenst. Handb. p. 4/0. t. 3?. f. 46. 

 Terebratula deltoidea, Valenciennes, 1819, in Lam. Hist. Nat. 



Bru(j. Enc. Mefh. 1797, t. ii. pi. 240. f. 4. 

 Tcrebratida triquetra, Parkinson (part.), Orr/. Rem. iii. 229. t. 16. 



f. 4, 8. 

 Terebratula antinomia, Catullo, 1827, Cat. Zool. 169. t. 5 ; 



Geogn. Zool. t. 2. f. 3. 

 Terebratula Duvallii, Newman, 1844, Zoologist, p. 679 (figures). 

 Pygope diphya {Link), King, 1840, Permian Fossils, pp. 81, 144. 

 Fossil. Kelloway Rockl. France. 



90. Terebratula diphyoi'des. B.M. 



Shell smooth, depressed, expanded, triangular, perforated in 

 the middle; valves unequal, the ventral most convex; beak 

 short, with two dorsal ridges ; foramen moderate, round. Lon. 

 22, lat. 25, alt. 11 lines. 



