77 



SYSTEMATIC LIST OF THE GENERA. 



Genera or sul^genera admitted to be valid, or not sufficiently known to the author to be reasonably 

 questioned, are printed in upright letters. 



Synonymes, or names suspected to be such, are indented ; absolute synonymes are in italics, the others 

 in upright letters; both under the name to which they are referred, or suspected to belong. 



An asterisk marks non-binomial synonymes. 



An interrogation-mark [?1 indicates that the family relations are doubtful. The same in parentheses 

 (?) indicates that the synonyme so marked cannot be definitely referred to any genus, or may denomi- 

 nate an assemblage of species which should be distributed among several groups. Before a name not 

 indented, it indicates a doubt as to its validity. 



The name following a genus refers to the author who used it in the sense indicated by its allocation 

 here, and not necessarily the author who first used it. This holds good throughout these lists. 



It must be borne in mind that this arrangement is merely tentative and subject to reform. 



Fam. Terebratulid-e. 

 (TerebratuUnce.) 



Terebratula, Miiller. 



* Terebratula, Llhwyd. 



* Sacculus, Llhwyd. 



* Lampas, Meuschen. 



* TereiratuUies, Schlotheim. 

 Terelratularius, Dumeril. 

 Lampas, sp. Humphrey. 

 Gryphus, Megerle. 

 Lampus, Sowerby. 

 Musculiis, Quenstedt. 

 Nucleata, Quenstedt. 



(?) Epithyris, King, not Phillips. 



Epithyrus, Paetel. 



Seminula, M'Coy, 1855. 



Dielasma, King. 

 Centronella, Billings. 



Cryptonella, Hall, 1861-3. 

 (?) Eennselseria, Hall. 

 (?) Leptocoelia, Hall, 1859. 

 Pygope, Link. 



* DipJiyifes, Schroter. 

 Pugifes, De Haan, 



, Antinomia, CatuUo. 

 (?)Orthotoma, Quenstedt. 

 (?) Vitulina, Hall, not Swainson. 

 Terebratulina, D'Orbigny. 



Agulhasia, King. 

 Cryptonella, Hall, 1867. 



? Cryptonema, Bigsby. 



Cryptocella, Paetel, not Adams. 

 Meganteris, Siiess. 

 Eudesia, (King) Dall. 



Waldheimia, King, not Brulld. 



Macandrevia, King, not Gray. 



(?) Gwynia, King. 



Trigonella, Quenstedt. 



Cincta, Quenstedt. 



Cryptacanthia, White & St. John. 



Lyra, Cumberland. 



Terehrirostra, D'Orbigny. 

 Tereh-irostris, Gray. 



(Magasinw.) 



Trigonosemus, Konig. 



Trigonoremus, Gray. 



Trigonosmus, Paetel. 



Trigonosema, Paetel. 



Fissirostra, D'Orbigny. 



Fissurirostra, D'Orbigny. 



Fissirostris, Gray. 



Fissuristra, Paetel. 



Deltliyridea, King. 



Deltyrydcea, Davidson. 



Delthiridwa, Gray. 

 ? Hynniphoria, Suess. 



Hinniphoria, Bronn. 

 Terebratella, D'Orbigny. 



Delthyris, Menke. 



Ismenia, King. 



Waltonia, Davidson. 

 Laqueus, Dall. 

 Megerlia, King, not Eob-Desv. 



Megerlea, Davidson. 



Orthis, Menke. 



Orthis, Philippi. 

 (?) Frenula, Dall. 



Ismenia, King, olim. 



Ismenia, Gray, Dall. 

 Kingena, Davidson. 

 Magasella, Dall. 

 ? Tropidoleptus, Hall. 

 Platidia, Costa. 



Morrisia, Davidson. 

 Bouchardia, Davidson. 



Pachyrhynchus, King. 

 Magas, Sowerby. 



Majas, Keferstein. 



Meg as, Isensee. 



(?) Mannia, Dewalque. 



