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CHAPTER XIV. 



SHELLS. 



Crustacea — Cancer Pagurus — Gelasimus vocans — Genus Maia — 

 Genus Calapa — Genus Eanina — MoUusea (or Shells) — Cir- 

 culation — Organs of respiration — Form of the body in the 

 Mollusca— The nervous system, &c. — Octopus cephalopoda — 

 Sepiaria — Pteropoda — Gasteropoda — Pulmonea — Testacella — 

 Vitrina — Helix — Pupa — Clausilia — Bulimus — ^Achatina — Suc- 

 cinea — Aquatic pulmonea — Genus Limnaeus — Genus Physse — 

 Genus Auricula — Nudibranchiata — Genus Tritonia — Infero- 

 branchiata — Genus Ancylus — Eectibranchiata — BuUaea — ^Hete- 

 ropoda — Genus Carinaria — Pectinibranchiata — Trochoides — 

 Trochus zizyphinus — T. cinerarius — T. maculata — T. jujubinus 

 — Genus Turbo (or Periwinkles) — Turbo littoreus — T. chry- 

 sostomus — T. pica — Genus Phasianella — P. Eubeus — Genus 

 Nerita — N. peloronta (or bleeding tooth) — N. versicolor — 

 Capuloides — Genus Crepidula — C. onyx — Buccinoides — 

 Genus Conus — Genus Cyprsea (Cowries) — C. pediculus 

 — C. coccinella — Genus Cplombella — C. mercatoria — Genus 

 Buccinum (the Whelks) — B. undatum — B. . lunatum — B. 

 reticulatum — Genus purpura — P. patulata — P. lapillus — Genus 

 Cassis — G. rufa — C. testiculus — C. flamnea — Genus Strombus — 

 S. gallus — Tubulibranchiata — Genus Vermetus — Genus Ma- 

 gilus — Scutibranchiata — Genus Fissurella — F. Grseca — Genus 

 Emarginula — E. Fissura — Cyclobranchiata — Genus patella (or 

 Limpets) — ^P. pellucida — Genus Chiton — C. marginatus — Ace- 

 phala — A. testacea — Genus Ostrea (the Oyster) — O. folium — 

 0. crista galli — 0. parasitica — Genus Pecten — P. concentricus 



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