181 
tricincta. 
Miihlf., 
920 
Hungary, 
Rossm., f. 87, 504. 
is Helix trizona, Ziegl. 
tridens, 
Mull., 
Germany, 
Rossm., f. 33, 305, 720. 
is Bulimus tridens, Miill. 
tridentata, var., 
Binn., 
1074 
Virginia, 
Jour. Bost. S. N. H.,3, pi. 18, f.3. 
. is Helix fallax. Say. 
4474 
tridentata. 
Say, 
1073 
New York, 
Fer., pi. 51, f. 3. 
Helicodonta tridentata. Say. 
4475 
“ var., 
New England, 
Wood Supp., pi. 7, f. 11. 
Tridopsis lunula, Rafin. 
4476 
{{ « 
Canada, 
Gould’s Invert., f. 115. 
Tridopsis lunula. Beck. 
4477 
u 
Pennsylvania, 
Bost. Journ., 3, pi. 17 et 18. 
Tridopsis tridentata. Beck. 
4478 
tridentina. 
Fer., 
996 
Jamaica, 
Fer., pi. 54, A, f. 4-6. 
trifasciata. 
Chemn., 
, 162 
Tranquebar, 
Chemn. 11, pi. 213, f. 3018-19. 
, is Helix laevipes. Mull. 
trifasciata, 
Stentz, 
29 
Cuba, 
Kust. C. C., pi. 29, f. 9-13. 
is Helix Cubensis, Pfr. 
trigonophora. 
Lam., 
1075 
Europe, 
Jour. d’Hist. N., pi. 42, f. 2. 
is Helix obvoluta, Mull. 
triodonta. 
Jan, 
1086 
Texas, 
Fer., pi. 69, D, f. 2. 
is Helix Texasiana, Moric. 
4479 
triodonta. 
D’Orb., 
1042 
Guayaquil, 
Yoy. Am. Mer., pi. 24, f. 1-3. 
Helicodonta triodonta, D’Orb. 
triplicata. 
Fer., 
France, 
Fer., pr. 476. 
is Pupa triplicata, Studer. 
4480 
tristis. 
Pfr., 
24 
Corsica, 
Phil. Icon., pi. 9, f. 3. 
Helix oeratina. Shuttle. 
trivittata, 
Born, 
973 
Madagascar, 
Kust. C. C., pi. 14, f 5, 6. 
is Helix sepulcralis, Fer. 
4481 
trizona. 
Ziegl., 
920 
Hungary, 
Rossm., f. 87. 
Helix tricincta, Muhlf. 
4482 
“ var.. 
Fer., pi. 69, A, f. 6. 
Helix zonata,var., Fer. 
4483 
<( (t 
Kust. C. C., pi. 79j f. 5, 6, 13j 14. Helix planospira, var., Cantr. 
Beck Ind., p. 25. 
Campylaea trizona. Beck. 
Held Isis, 1837, p. 911. 
Cingulifera trizona, Held. 
Rossm., f. 504. 
Helix Rumelica, Ziegl. 
Kust. C. C., No. 474. 
Helix rliodopea, Friv. 
Kust., pi. 79, f. 5, 6. 
Helix Sanderiana, Friv. 
Fer., pi. 68, f. 10. 
Helix fumigata, Friv. 
Kust., pi. 79, f. 13, 14. 
Helix Langiana. 
trochiformis, 
Mont., 
36 
England, 
Mont. T. B., pi. 11, f. 9. 
is Helix liilva, Drap. 
4484 
trochiformis. 
Fer., 
539 
Isl. of Opara, 
Kust. C. C., pi. 13, f. 7, 8. 
Helicella trochiformis, Fer. 
4485 
“ var.. 
Isl. of Taheiti, 
Ant. Verz., p. 40, N. 1464. 
Carocolla ciroumdata, Miihlf. 
trochilus. 
Flem., 
36 
England, 
Flem. Brit. An., p. 260. 
is Helix fulva, Drap. 
trochlearis. 
Andrz, 
420 
Europe, 
Fer., pi. 85, f. 1-4. 
is Helix ericetorum, Miill. 
Trochoides, 
Desh., 
612 
New Guinea, 
Fer., pi. 106, f. 10-12. 
is Helix Gaherti, Lesson. 
4486 
Trochoides, 
Poiret, 
466 
France, 
Drap. Moll., pi. 5, f. 3-5. 
Helix conica, Drap., Risso. 
4487 
“ var.. 
Italy, 
Kust. C. C., pi. 23, f. 18, 19. 
Helicella conica, Fer. 
Mediterranean, 
Risso, 4, p. 152. 
Helicella solarium, Risso. 
Sicily, 
Beck Ind., p. 10. 
Theba conica. Beck. 
Spain, 
Rossm., f. 347, 348. 
Theba Trochoides, Beck. 
Held Isis, 1837, p. 913. 
Kust. C. C., No. 134. 
Desh. Lam., p. 77. 
Phil. Sicil., 2, p. 217. 
Pfr. Symb., 2, p. 38. 
Kust., pi. 23, f. 12, 13. 
Kust., pi. 23, f. 24, 25. 
Mich. Compl., pi. 15, f. 11-14. Helix turritella, Parr. 
Helix vertioillata, Parr. 
Xerophila coniea. Held. 
Helix anlculata, Crist, et Jan. 
Helix mgosiuscula, Mich. 
Helix rugosa, Arad, et Magg. 
Helix pumilio, Pfr. 
Helix catenata, Parr. 
Helix remissa, Parr. 
