722 
• Sphærium, Scopoli, II, 495,497, 5oo, 
0a3, 6a6, 699, 644, 645, 
651. 
— æquatoriale, II, 04 9. 
— Bahiense, II, 65o. 
— caliciilatum, II, 05a. 
— corneum, II, 646, 647. 
— Cubense, II, 65o, 654. 
— Forbesi, II, 64g. 
— lacustre, II, 646, 65o. 
— maculatum, II, 653. 
— méridionale, II, 05o, 654, 675. 
— modioliforme , II, 65o. 
— parvulum, II, 654. 
— Portoricense , II, 65o, 654- 
— rivale, II, 646. 
— rivicola, II, 645, 646, 647. 
— securis, II, 647, 648. 
— solidulum, II, 65a. 
— solidimi. II, 65o. 
— subtransversum, T. Prime, 
II, 6 4 9 , 652, 675. 
— transversum , II, 646. 
— triangulare, Sav, II, 651. 
— viridans, II, 65o, 654. 
— Yucatanense, Crosse el Fischer, 
II, 65o, 653, 67.3. 
SPHENONAIAS, Crosse et Fischer, 
II, 507, 616. 
SPIRAXIS, C. B. Adams, 1, 9 3,585, 
604, 607, 699. 
— acus, Shuttleworth, I, 614. 
— ambigua, I, 1 89. 
— auriculacea , I, 55. 
— Barclayi, I, 90. 
— Berendti, Pfeiffer, I, 611, 
613. 
— biconica, I, 3a. 
— Blandi, Crosse et Fischer, I, 607, 
616. 
— Boucardi, I, 43. 
— brevis, I, 6o4. 
— catenata, I, 63. 
— Cobauensis, I, 5a. 
■ — coniformis, I, 43. 
— coslulosa, l, 6o4. 
— costulosus, I, 61 5. 
— cylindracea, I, 3i. 
— dubia, I, 65. 
— euplycta, I, 619. 
INDEX ALPHABÉTIQUE. 
SPIRAXIS euptyctus, Pfeiffer, I, 
61 1, 612, 6i3, 6i4. 
— flavescens, I, 89. 
— Guatemalensis, Crosse el Fi- 
scher, I, 607, 618, 6a 4 ; ïï, 
476. 
— irrigua, I, 87. 
— Lattrei, I, 33. 
— ligulata, I, 68. 
— linearis, Pfeiffer, I, 616. 
— - lurida, I, 48. 
— lymnæiformis, I, 38. 
— Martensi, Pfeiffer, I, 619. 
— Meridana, I, 3a. 
— Mexicana, I, 617. 
— Mexicanus, Pfeiffer, I, 617. 
— mitræformis, I, 69. 
— Mohriaua, I, 64. 
— Nicoleti, I, 98. 
— nigricans, I, 60. 
— oblonga, I, 57. 
— parvula, I, 57, 
— Pfeifferi, I, 98. 
— phy sodés, I, 54. 
— Salleaua, I, 37, 608. 
— scalariopsis, Morelet, I, 609. 
— Shutlleworthi, T, 91. 
— streptostyla , I, 97. 
— sulciferus, Morelet, I, 607, 
610, 619 , 0 1 3. 
— tenuis, Pfeiffer, I, 614, 
— turgidula, I, 58. 
— ventricosula, I, 3 1 . 
Stalioa, II, 974. 
Stexogyra, I, 58i, 585. 
— Berendli, I, 635. 
— Boconrtiana, I, 609. 
— Caracasensis, I, 599. 
— Caraccasensis , I, 899. 
— Colimensis, I, 6o3. 
— Martensi, I, 690. 
— octona, I, 64o. 
— Rangiana, I, 63g. 
— subula, I, 600. 
— Irochlea, I, 64a. 
STENOGYRIDÆ, I, 581, 699, 699. 
Stexomelania , II, 3o8, 309, 3io, 
3 1 1 . 
Stenopds, I, 1 54 . 
Stenotiiyra, II, 2 54 . 
Stephanoda coactiliala, I, 934. 
Stimpsosia, II, a 58 . 
Sioastoma, II, 873, 38 a, 887. 
STREBELIA, Crosse et Fischer, I, 
11, 644 , 699; II, 3 i, 657, 
681 , 682. 
— Berendti, Pfeiffer, I, 12; II, 
6.57, 661 , 678. 
Strephobasis, II, 684 . 
SïKËPOMATIDE, II, 307, 3 lO, 084 . 
STREPTOSTYLA, Shuttleworth 
(emend.), I, 14, 6 o 5 , 699; II, 
673, 674, 689. 
auriculacea, Pfeiffer, I, 55,67. 
— biconica, Pfeiffer, I, i 5 , s 5 , 
32, 55 , 5 7 . 
— ■ Binneyana, Crosse et Fischer, 
I, 29. 
— Blandiana, Crosse et Fischer, I, 
28, 44 . 
— Bocourti, Crosse et Fischer, I, 
47, 4 9 . 
— Botteriana, Crosse et Fischer, I, 
a 3 , 25, 26, 33 , 66. 
— Boucardi, Pfeiffer, I, 48 , 56, 
54 ; II, 670. 
— Boyeriana, Crosse el Fischer, I, 
46. 
— bullacea, Pfeiffer, I, 48 , 56. 
— catenata, Pfeiffer, I, 63, 57. 
— cingulata, Crosse et Fischer, I, 
40. 
— Cobanensis, Trislram.1, 52, 54. 
— coniformis, Shuttleworth, I, 3i, 
43, 47; II, 658 . 
— cornea, Crosse et Fischer, I, 51. 
— cylindracea, Pfeiffer, I, 30; II, 
670. 
— Delattrei, Pfeiffer (emend.), I, 
33, 38 . 
— delibuta, Morelet, I, 44. 
— dubia, Pfeiffer, 1, a 3 , 65. 
