72 ARCADE. 



us; we believe it has only occurred in. the Hebrides. We 

 doubt the distinction. 



GALEOMMA AND LEPTON, Turton. 



The genera Galeomma and Lepton have received from the 

 hands of Dr. Turton a conchological constitution, but as 

 respects natural position, they have been buffeted from place 

 to place, in accordance with the various views of naturalists. 

 In some systems they are associated with the Kelliada, though 

 doubtfully, on account of the want of knowledge of the animal. 

 These disturbing causes are happily in a great measure removed, 

 and we have it in our power to fix permanently these wanderers 

 in the only British family that has with them a sufficiently 

 corresponding community of attributes. Though they are 

 aberrant genera of the Arcadan type, when strictly consi- 

 dered they undoubtedly belong to that family, and it will be 

 shown that they have the strongest claims to this their natural 

 lineage. 



To establish a new family for these beautiful genera would 

 indeed be a superfluous labour, and repugnant to our well- 

 known feelings to add unnecessarily to a host of worthless 

 positions, when there is already an unmistakeable resting-point. 

 But our descriptive notes will further explain these matters. 



GALEOMMA, Turton. 

 G. TURTONI, Sowerby. 

 G. Turtoni, Brit. Moll. ii. p. 105, pi. 36. f . 1 1 ; (animal) pi. O. f. 5. 



Animal oval, fleshy, pure white; mantle of thin texture, 

 except at the edge, which is muscular, and forms a tumid cord 

 that extends beyond the shell, from which are thrown off 

 undulated double margins, one of which lines the shell, and is 

 marked with equidistant frosted-white eminences or ocelli, 

 eight or nine on each side, with fine white filaments between 

 them. The mantle is partly closed in front, but there is an 

 anterior pedal aperture. The foot is long, cylindrically taper- 

 ing to its termination ; at the heel, close to the body, is the 



