The figures are o/" natural size unless the amount of enlargement or reduction is stated. 



PLATE I. 



Genus — Lima, Brugulerc. 



Lima canalij'ent, Goldfiiss. Upper Greensand (zone of Feden aspcr), Ventnor. 

 Sedgwick Museum, Cambridge ; except fig. 2, York Museum. (P. 1 .) 



1, 5, 6 a, 7 a, left valves ; 6 h, antcro-dorsal view ; 7 b, portion x 2. 



2, 3, 4, right valves. 



