Thecalia, H. & A. Ad. III 
Theceurybia, Bronn. II 
Thecidea, Defrance. III 
Thecidiide. » «co 
Thecidium, Sowb. . III 
Thecodonta, A. Ad. IIT 
Thecosomata, Gray. II 
Thecospira, Zug. JET 
Theliconus, Swains. II 
Theliderma, Swains. III 
Thelidomus, Swains. III 
Theliostyla, Mech. . II 
Themisto, Oken. II 
Theobaldius, Nevill. II 
Theodoxus, Montfort. II 
Theora, H. & A. Ad. III 
Thermhydrobia, Paul. II 
Thersites, Mch. Iil 
Thersites, Pfeiffer. III 
Thesbia, Jeffreys. . II 
Thetironia, Stolicz. III 
Thetis, Adams. . III 
Thetis, Sowerby. III 
Thiarella, Swainson. II 
Thiatyra, Sowb. Itt 
Thisoa, Montfort. . II 
Thordisa, Bergh. II 
Thracia, Leach... . III 
Thuridella, Bergh.. If 
Thyea, H&A. Ad. TE 
Thyella, H. & A. Ad. III 
Thylacodes, Guettard. II 
Thyreopsis, H. Ad. III 
Thyreus, Philippi... II 
Thyrophorella, Greef. IT 
Thysaira, Leach. Ill 
Thysanoceras, Hyatt. II 
Thysanota, Albers. III 
Thysanoteuthide. . II 
75 II 
Thysanoteuthis, Tr. I 
Thysaphora, Strebel. III 
Tiara, Bolten. II 
6c oe § r ali 
Tiara, Swn. via 
Tiarella, Swn. II 
INDEX. 
PAGE 
232 | Tiaropsis, Brot. . Il 
98 | Tiberia, Jeffreys. BE 
314 | Tichogonia, Rossm. III 
$14 | Tiedemannia, Chiaje. IT 
314 | Tifata,H.& A. Ad. III 
221 | Tigris, Trosch. . II 
89 | Timoclea, Leach. EGE 
327 | Tindaria, Bell. 0 AE 
188 | Tiphobia, E. A.Smith. IT 
239 | Tirolica, Bottg. . LAR 
35 | Tirolites, Mojs. . II 
294 | Tisoa,M.de Serres. IT 
376 | Tithyonia, Cavolini. II 
286 | Tivela, Link. Ill 
296 | Todarodes, Steenst. II 
163 | Tomastoma, Desh.. IT 
266 | Tomella, Swn. II 
46 | Tomichia, Benson. II 
44 | Tomigerella, Pfr. II! 
186 | Tomigerus, Spix. III 
181 | Tomocyelus,C.& F. II 
179 | Tomogerus, Montf. III 
181 | Tonicella, Carp. II 
168 | Tonicia, Gray. ED 
211 < - Lf 
53 | Torcula, Gray. II 
374 | Torinia, Gray. Lt 
144 | Tornatella, Lam. II 
390 | Tornatellea, Conr. II 
214 | Tornatellidee. Is 
165 | Tornatellina, Beck. III 
227 | Tornatelline. 1I 
222 | Tornatelloides, Pfr. III 
199) | Tornatina, A:Ad. 5 Et 
290 | Torquatella, Held.. IIT 
211 | Torquilla, Studer. . III 
76 | Tortifusus, Conr. II 
31 | Tortoliva, Conr. II 
13 | Tortula, Vest. Iil 
dl | Tortulosa, Gray. IT 
31 | Totteria, Perkins. .. III 
29 | Toucasia, M.-C. . II 
253 | Tournoueria, Brus. II 
257 | Toxoceras,d@’Orb. . IT 
71 | Toxoglossa. Ill 
168 | Toxosoma, Conr, Il 
