CLIO. 119 



Spitzbergen and Greenland/ after the description of 

 C. caudata, was merely incidental. He does not seem 

 to have himself known any Pteropod. Clione papilio- 

 nacea of Pallas [Clio borealis, Bruguiere) was described 

 by Miiller and Fabricius under the name of Clio retusa, 

 erroneously supposing it to be Linnets species. The 

 genus Clione was established by Pallas in 1774, before 

 the name Clio was misapplied by Miiller and other 

 writers. 



Clio pyramida'ta*, Browne. 



Clio pyramidata, Browne, Civ. & Nat. Hist. Jamaica, p. 386, pi. 43. f. 1. 



Body opaque, slender, and pointed at the bottom, capable 

 of protruding beyond the shell or sheath : head small and 

 round, " adorned with a little sharp bill : " eyes beautiful 

 * green : foot forming two transparent membranous expansions, 

 by which the animal moves with great celerity on or under 

 the surface of the water. (Browne.) 



Shell triangular, convex in front and slightly concave on 

 the back, abruptly sloping to a fine point, extremely thin and 

 fragile, quite transparent, and lustrous : sculpture, 5 ridges in 

 front and 1 at the back; the former are symmetrical, the 

 outermost two being the largest, and the central one inter- 

 mediate in size between those and the other two ridges ; dead 

 shells exhibit also numerous transverse and flexuous striae, 

 especially on the back : colour clear-white : apex spearhead- 

 shaped or sharply ovate, separated by a very narrow line from 

 the rest of the shell : mouth arched in the middle, and sloping 

 with a gentle curve to each side. L. 0*5. B. 0*3. 



Habitat : Muddy sand, in 60-84 i., on the north- 

 eastern and north-western coasts of Shetland ; rare. 

 One specimen only contained the animal ; and that was 

 in a collapsed state ; the others were more or less im- 

 perfect. .Carpenter and Thomson's dredgings in the 



* Pyramidal. 



