— 41 — 



Genus Cyclostoma, Drap. 



C. melitense, Sowb. Very comuion under stones in un. 



cultivated grounds. 

 C. pygmseum, Michaud. * On the rocks near the Saline. 



IX. Familia LIMNJEACEA, Lamk. 



Genus Planorbis, Miiller. 



P. marginatus, Drap. 



In the reservoir behind the Plane tree in the Floriana 

 Gardens. 



Genus Limnseus, Drap. 



L. pereger ?, Miiller. In fountains and aqueducts at 



Boschetto, Ceppuna, and other places. 

 L. sp. nov., Nobis. * At Gorghenti and the 



Gneina. 



Genus Physa, Drap. 



Ph. melitensis, t Nobis.* 



•f* Amongst Mr. Maaio's loose papers I have found the 

 following diagnosis of Ph. melitensis r — 



This new species of Physa was found by me in the reservoir 

 behind the Plane tree in the Floriana Gardens, on the 

 12th Apvil, 1856. Several individuals placed in a glass 

 vessel of water, attached themselves to the edge of the 

 same, and two days afterwards, deposited a gelatinous» 

 crystalline, and oblong body, of about the same size as 

 the mother mollusc, very transparent, and containing a 

 mass of minute, spheroidal, and limpid eggs, like air- 

 bubbles. Each egg had an opaque, thin globule on its 

 surface, of a bright yellow colour. On the 16th tbesa 

 globules became discoloured. On the 19th the posterior 



