BIBLIOGRAPHY. 



329 



Lapparia, Fusimttra and Conomitra, none of which however, are 

 characterized by their authors. 



Part XV contains 67, pages of letterpress and 15 plates, 

 and continues the account of the Mitridse, the sections Aidone, 

 Swainsonia, Scabricola, Cancilla, Chrysame, Strigatella and 

 Zierliana being considered. A list of 39 species is given at the 

 end, of species undetermined. 



In the genus Thala 12 species are enumerated and described, 

 in addition to which, four species are mentioned of which figures 

 have never been published. 



The genus Miiroidea with 6 species, Dibaphus with one, and 

 Turricula with 24 species and 3 varieties, follow. The section 

 Costellaria of Turricula has 67 species and several varieties 

 enumerated, but some of the species, as ^thiopeia Jickeli, the 

 author evidently considers worthless. 



The section is also very extensive, a good number of species 

 being enumerated. 



The plates are fully equal to those of preceding parts, and 

 no less than 96 figures are in this one part alone. 



A Parasite of Limnaea truncatula. — At a meeting of 

 the Linnean Society held on the 2nd of November, 1882, Mr. 

 A. P. W. Thomas drew attention to a series of specimens (under 

 the microscope) and diagrams illustrative of the life history of the 

 Liver-Fluke ( Fasciola hepatica). His experiments show that the 

 embryos of the fluke, as free cercarise, burrow into and develop 

 within the body of Liinncea truncatula, and thereafter pass with 

 the herbage into the stomach — and ultimately the liver — of the 

 sheep. Salt added to the sheep's diet is found to act as a prophy- 

 lactic. 



