INDEX TO GENERA AND SUBGENERA OF iMOLLUSCA. 



123 



Risella, 33. 



Rissoa, see Nystia, Pseudotaphrus, 



Rissoia. 

 Rissoia, 32, 65. 

 Rissoina, 32, 65. 



Rtssohia, see Eulima, Pseudotaphrus. 

 Rocellaria, i. 

 Rostellaria, 41, iii. 

 Rostellaria, see Aporrhais, Rimella, 



Strombus. 

 Rotellorbis, 28. 



Sagdellina, 56. 



Saintia, 20 



Sandbergeria, 38, 66. 



Sassia, 43. 



Saxicava, 2, 61. 



Scala, 25, 64, 112. 



Scalaria, see Acirsa, Canaliscala, Cerithi- 



scala, Foratiscala, Mathildia, Scala, 



Tenuiscala, and 114. 

 Scaliola, 36. 

 Scaphander, 54, 68. 



SCAPHOPODA, 20, 64. 



Schismope, 21. 

 Scintilla, 12, 63, 114. 

 Scissurella, 21, 64. 

 Scrobiculabra, 4. 

 Scrobicularia, 4, 114. 

 Scutuliim^ see" Parascutum. 

 Scutum, 21. 

 Segmentinu, 56. 

 Sellia, 31. 

 Semiactaeon, 53. 

 Semiauricula, 56. 

 Semifusus, 46. 

 Semimodiola. 17. 

 Semiplicatula, 20. 

 Semisinus, 34. 

 Semiterebellum, 42, 

 Semivertagus, 38. 

 Semperia, 21. 

 Senectus, 23. 

 Sepia, 59. 

 Septifer, 17. 

 Seraphs, 42. 



Seraphs, see Terebellum. 

 Serpulorbis, 36. 

 Sigaretopsis, 28. 

 Sigaretus, 28. 

 Sigaretus, see Micreschara. 

 Siliqua, i, 61, 

 Sihqiiaria, see Tenagodes. 

 Simochilus, 22, 112. 

 Sirapulum, 43. 

 Sipho, 45, 115. 

 Siphonalia, 45. 

 Siphonantalis, see Pulsellum. 

 Siphonaria, 55, 1 15. 

 Siphonodentalium, 20. 



Sistrum, 44, 66. 



Solariella, 22. 



Solarium, 32. 



Solarium, see Eumargarita. 



Solemya, see Solenomya. 



Solen, I. 



Solen, see Ensiculus. 



Solena, i. 



Solenocurtus, i. 



Solenomya, 13. 



Solenotellina, 5. 



Soletellina, see Solenotellina. 



Solidula, 53. 



Sparella, 49. 



Spartina, 57, 113. 



Spengleria, i. 



Spha^rium, 8. 



Sphenia, 2, 61, 1 14. 



Spirialis, 60. 



Spondvlus, 19, 63. 



Sportella, g. 



Steganomphalus, 23, 112. 



Stenothyra, 31, 65. 



Stephanoconus, 50. 



Stirpulina, i. 



Stolidoma, 56. 



Strebloceras, 35. 



Strepsidura, 46. 



Streptochetus, 46. 



Strobila, 57. 



Strobilus, see Strobila. 



Strombidea, 41. 



Strombus, 41. 



Stylia, see Epetrium. 



Stylifer, 26. 



Subemarginula, 21. 



Subularia, 25. 



Succinx-a, 57. 



Suessionia, 46. 



Sunetta, 7, 114. 



Surcula, 51. 



Sveltella, 49. 



Sycum, 46, no. 



Syndesmya, 3, 61. 



Syndosniya, see Syndesmya, and 114. 



Syrnola, 24. 



Systenope, 53. 



Tapes, 5. 



Tectariopsis, 23. 



Tectus, 22. 



Teleostoma, 38, 112. 



Telescopium, 41. 



Tellina, 4, 61, 114. 



Tellina, see Arcopagia, Gari, Homa- 



lina, Oudardia. 

 Tenagodes, 36. 

 Tenuiscala. 27. 

 Terebellum, 42. 

 Terebra, 53. 



