1859.] 



WRIGHT INFERIOR OOLITE. 



41 



Fossils of C. 



Ammonites la;viusculus, Sow. 



Sowerbii, Miller. 



Belemnites giganteus, Sckloth. 

 abbreviates, Miller. 



Natica adducta, Phil. 



sp. n. 



Monodonta laevigata, Sow. 

 Pleurotoniaria fasciata, Sow. 

 Trochotoma carinata, Lye. 

 C'hemnitzia, sp. n. 



Trigonia costata, Sow. 



formosa, Lye* 



Pholadomya fidieula (var. Zieteni), 



Heraulti, Ag. 



media, Ag. 



ovulum, Ag. 



Homomya crassiuseula, Lye. 

 Myopsis clilata, Phil. 

 Cercomya pinguis. Ag. 

 Goniomya angulifera, .Slow. 

 Pleuromya elongate, Ag. 



tenuistriata, Ag. 



Gresslya Latirostris, Ag. 



abducta, Phil. 



conformis, Ag. 



Ceromya Bajociana, d' Orb. 

 Trichitee undulatus, Lye. 

 Gervillia Hartmanni, Gvldf. 



tortuosa, Deslong. 



Quenstedtia oblita. Phil. 

 Cardium striatulum, Phil. 



kevigatum, Lye. 



Corbicella tumidula, Lye. 

 Unicardiiim depressum, Phil. 



Lower Trigonia-grit. 



Astarte clegans, Sow. 



excavate, Sow. 



Opis cordiformis, Lye. 

 Tancredia donaciformis, Lye. 

 Macrodon Hirsonensis, d Arch. 

 Cueuilaa oblonga. Sow. 

 Avicula digitata, Deslong. 

 Cypricardia cordiformis, Desk. 

 Isocardia cordata. Kuckm. 

 Pinna cuneata, Phil. 



ampla, Sow. 



Modiola plicata, Sow. (M. Sowerbii, 

 d'Orb.) 



■^9- bipartita, Sow. 



gibbosa, Sow. 



imbricate, Sow. 



Lima compressa, Wr., sp. n. 

 sulcata, Miinst. 



Terebratula impressa, Dav. (T. Mcri- 

 aui, Oppef.) 



Wrightii, Davids. 



Rhynchonella concinna, Sow. 

 spinosa, ScMoth. 



I fy body pus caudatus, Wright. 

 Clypeus Hugii. Ag. 



Thecosmilia gregaria, Edw. S; Haiuic. 

 Isastnca tenuistriata, Edw. Hr Haime. 

 Thamnastraa Defranciana. MichsUn. 



Terqucmi, Edw. <y Hainie. 



Anabacia orbulites, Larnour. 

 Calamophyllia, sp. 



Latomncandra Davidsonii, Edw. 8f 

 Haime. 



* I have to thank my valued friend. Dr. John Lycett, for the following 

 note on Trigonia formosa : — 



Trigonia formosa, Lycett (Syn. Lyrodon striatum, Goldf. Petref. tab. 137. 

 fig. 2 ; Trigonia striata, Qnenstedt, Jura, tub. 40. fig. 2, not Trigonia striata, 

 Sow.). — Shell ovately trigonal, with a low convexity ; the uiuboncs arc elevated 

 and recurved ; tlie superior border is lengthened and concave, sloping obliquely 



downwards; the area is concave, rather narrow, with a mesial obHqne furrow 



bordered by two tnberoulated carina- and noosed bj densely arranged transverse 

 striatums ; the lamellate postligamental space is rorj much lengthened and 

 excavated. The orenulated rowi of costs: upon the other portion of the shell arc 



arranged baa manner similar to those of '/'. striata; hut they arc less elevated, 



and the smooth interstitial Spaces are wider. This handsome species has gene- 

 rally been mistaken tor T.strtata, owing chiefly t" the very indifferent specimens 

 winch wen- r o pr o a on ted upon Table 2o7 of the ' Mineral Concbology,' and the 

 insuilii-ient description appended ; a suocincl description of '/'. striata will be the 

 must ready means of showing the specific distinctions which characterise the two 

 shells. '/'. striata baa the general figure subquadrate, owing chiefly to the 

 breadth of the flattened ana at its posterior extremity, and the nearli boritontal 



position Of the httlelani . . 1 -terior to the ligament. Ayassu remarks, 



upon its subquadrate Bgure, thai he should hare been in. lined t<> place it with 

 bis section " Q uadra t e s, if il were not farniahed with a distinct carina, separating 



the area from tin Stated portion of the shell, as exists in the " Cl.i\i Hat ■>■ " 



generally. The area is verj large, fl attened or even slight!) convex; its breadth 

 at the posterior border is equal t" the entire breadth ol the costated portion of 



