132 



doubtful if Orthocera and other allied fossil genera are Decapodous, 

 or Dibranchiate Cephalopods. 



The arrangement followed is that which was proposed in the Syn- 

 opsis of the Contents of the British Museum for 1838, and which 

 has been gradually modified in the different editions, as I have be- 

 come better acquainted with the animals of the different genera ; and 

 one or two alterations have been made for the same reason in this 

 edition of the list. It is founded on the examination of the animals 

 of all the molluscans contained in the London and Paris collections, 

 as well as of all the drawings or engravings of the animals which I 

 have been enabled to see, exceeding more than five thousand species, 

 being at least one hundred times as many animals as were known 

 when Lamarck proposed his system, and fifty times as many as were 

 known to Cuvier when he published his system in the ' Animal 

 Kingdom.' 



Fam. I. STROMBID^. 



1. Strombus, Linn. 1754, Lam. 1801, Mont/. 1810; not Strombus, 



Browne, 1/56. Alatae, Gevers. 1/87. Alatus, Humph. 1797- 

 Lanibis, Bolten, 1798. Strombus pugilis, Linn. 



Conchilium, Browne, 175G. Strombus gigas. 



Canarium, Schum. 1817. Strombidea, Swains. 1840. St. urceus. 



Pterocera a, Schum. 1817. St. latissimus. 



Strombus ft, Schum. 1817. St. epidromis and St. auris Dianse. 



2. Pterocera, Lam. 1801. Strombus Pterocere, Blainv. Lambis, 



sp. Bolten, 1798. Pteroceras, Soiv., Swains. 1840. Aporrhais, 

 Rondel. Strombus, Humph. 1797. St. lambis. 



Pteroceres, Mont/. 1810. Pterocera ft, Schum. 1817. St. scorpius. 



Harpago, Klein, 1783. St. Chiragra. 



3. Fusus, Humph. 1797- Rostellaria, Lam. 1801, Schum. 1817. 



Rostellum, Mont/. St. clavus. 

 Strombus fissurellus, Linn. 

 Hippochrenes, Mont/. 1810. Hippocrena, Schweig. 1820. Hip- 



pocrenes, Brown, 1824. Hippocrene, Latr. 1825. Rostellaria ft, 



Blainv. 1825. St. amplus, Brander. 



4. Seraphys, Mont/ 1810. Terebellum, sp. Lamk. Voluta/sp. Oken, 



1815. Bulla sopita, B. volutata, Brander. 

 Terebellum, Lam. 1801, Mont/ 1810, p. 379 (not 11), not Browne, 

 1756. Bulla Terebellum. 



Fam. II. MURICIDiE. 

 a. Tritonina. 



5. Apollon, Mont/ 1810. Ranella granifera, Lamk. 



Ranella, Lam. 1 8 1 2. Rana, Humph .1797. Bufo, Mont/. 1 8 1 0, 



not Baud. Murex gyrinus, Linn. 

 Buffonaria, Schum. 1817. M. spinosus. 

 Gyrina, Schum. 1817. Apollon, Blainv. Murex reticularis, Linn. 



