120 Chusan Shells. [No. 2. 



This animal is clearly not a slug (Limax,) from the occurrence of 

 a general, instead of a partial shield, which covers the body nearly 

 to the extremity like a mantle. It differs, however, from Onoliidium, 

 Buchanan, Yaginulus, Cuvier, and Veronicella, Blainville, in having 

 the common orifice at the right side and near the posterior extre- 

 mity under the mantle, but in the anterior part of the mantle as 

 in Avion. From Oncliidium it differs also in having the lower 

 tentacula or appendices whole, and not bifurcate or palmated. The 

 animal forms a connecting link between Avion and Onchidium. 

 I have not access to any description of Phylomique or Eumele, in- 

 dicated in p. 153, Bangs Manuel des Mollusques, as brought to 

 De Berrussac's notice by M. Bafinesque. 



Melania cancellata, Benson. 

 Batillaria zonalis, Benson. 

 Dreissena purpurascens, Benson. 

 Modiola senhousia, Benson. 

 Anodon gibbum, Benson. 

 Corbicula fuscata, Lamarck. 

 Venus sinensis, Lamarck. 

 Sanyvinolaria iridescens, Benson. 

 Area galactodes, Benson. 



2. — From Macao, 



Helix similaris, Benson. 

 Achatina erecta, Benson. 

 Succinea • ? 



Littorina ? 



Littorina ? 



Mytilus ? 



3. — From various localities. 



Placuna -placenta ? 



This shell is used by the Chinese as a substitute for panes in windows. Several 

 junks, loaded with these shells, arrived at Chusan, in 1840. They were said to 

 be collected on the shores of Formosa, and the Loo-choo Islands. 



Placuna? Found in a house in Ting-hae. 



Pecten. Found in a house in Tin^-hae. 



Haliotis. From the Island of Quel-paert. 



Agaricia, (Lamouroux). This beautiful undescribed Madrepore is said to inhabit 

 the shores of Chin-choo, (Fokien Province). 



