Conchifera. 127 Gryphaea. 



sinuata, Sow. not Lam. (E. aquila), M. Con. 333. 



sinuata, Marcou, not Sow. not Lam. (E. costata, var ponde- 



rosa), Geol. N. A. 37, 3, 1.* 



segunda, Lam. (E. conica), An. S. Vert. vol. vi, 199. 

 f dilatata var. Tucumcarii, Marcou (Pitcherii), Geol. N. A. 



43, 4, 1. 



staumaloidea, Forbes (E. inflata), G. T. vol. vii, 156, 17, 15. 

 vesicularis, Lam. Sp. (Ostrea), Brown, Leth. Geog. pi. 32, 1. 



Everywhere. C. 



vesiculosa, Sow. (vesicularis), M. Con. 369. 

 vomer, Morton (E. lateralis), Synopsis, 54, 9, 5. 



HETTANGIA. 

 Americana, M. & H. (TANCREDIA), 1856, Proc. Acad. p. 274. 



HINNITES, Defr. 1821. 



Leymerii, Desk. M. G. S. F. vol. v, 27, 14, 1. Fr. N. 



Favrinus, P. & R. Env. Gene>. 503, 43, 2, pi. 44. Fr. G. 



Studeri, P. & R. id. 504, 45, 1. Fr. G. 



Homomya, Agas. 1842. 

 alta, Roem. (PHOLADOMYA), Kreid. Tex. 45, 6, 11. 



INOCERAMUS, Pork. 1811 (Catillus, Brong. 1822). 



alatus, Goldf. P. Germ. 116, 112, 3. G. C. 



alveatus, Morton, Syn. 63, 17, 4. Ala. 0. 

 angulatus, d'Orb. P. F. 515, 408, 3, 4. Fr. U. G. 



annulatus, Goldf. P. Germ. pi. 110, f. 7. G., Fr. C. 



aratus, Con. Lynck's Exped. 226, 19, 113. Syria. C. 

 argenteus, Con. Jour. Acad. 2d s. vol. iii, 329, 34, 16. Miss. C. 



aviculoides, M. & H. Proc. Acad. 181. Nebraska. C. 



* Prof. Marcou appears vexed that American Palaeontologists refuse to follow 

 him, in his obviously incorrect determination of the species, in the work quoted 

 above. If we acknowledge the above species to be sinuata, then E. costata is 

 only a variety of the same species, for I have seen every intermediate form be- 

 tween this and the closely costate variety. 



f For remarks on G. Tucumcarii, see Proc. Acad. Nat. Sci. for December, 

 1860. It is incorrectly referred to the Jurassic by Prof. Marcou. 



