APPENDIX. 269 



by Mr. Barlee at Skye and the Sketlands, in company with J. 

 opalina. 



Vol. iii. p. 158. Skenea 1 nitidissima. 



Several conchologists believe this shell to be identical with the 

 Helix bicolor of Adams (Trans. Lin. vol. v. pi. 1, f. 25, 26, 27, 

 from which Mont. Test. Brit. vol. ii. p. 447 ; Mat. and Rack. 

 Trans. Lin. vol. viii. p. 205 ; Turt. Conch. Diet. p. 58 ; Turbo 

 bicolor, Flem. Brit. Anim. p. 301 ; Spira bicolor, Brown, 111. 

 Conch. G. B., p. 20, pi. 8, f. 50, 51). 



That shell, said to differ from H. nitidissima in being perfectly 

 devoid of lustre or striae, and having a white mouth, is so 

 obscurely defined, " Testa lsevi, duobus anfractibus, vix umbili- 

 cata," that we shall not attempt to pronounce what it was meant 

 for. It would be well for science if some of the crudities of 

 Walker and Adams * could be consigned to oblivion. 



Vol. iii. p. 1G1. Skenea? divisa. 



This curious shell and some allied forms, referred to Skenea 

 with a doubt, we ventured to predict would eventually prove to 

 be allies of Trochus. Some very similar fossils had been placed 

 by Mr. Searles Wood in Adeorbis, in all probability the true 

 place of the recent forms in question also. The discovery of the 

 animal of several, by our indefatigable friend, Mr. Clark, has 

 confirmed our surmises regarding their affinities. 



The animal of Skenea ? divisa has "a rather long, broad, finely 

 wrinkled proboscidal muzzle. The tentacula are long, flattish, 



* Amongst others may be specified the Helta; tubulata (Lin. Trans, vol. iii. 

 p. 67, pi. 13, f. 35, 36, from which Mont. Test. Brit. vol. ii. p. 446 ; Mat. and 

 Rack. Trans. Lin. vol. viii. p. 204 ; Turt. Conch. Diet. p. 57 ; Turbo tubulatus, 

 Flem. Brit. Anim. p. 301 ; Spira tubulata, Brown, 111. Conch. G. B. p. 20, pi. 

 8, f. 46) a species manufactured from the mere fragment of a shell, and the Helix 

 unispiralis (from Walk. Test. Min. Rar. fig. 27 ; Mont. Test. Brit. p. 443 ; 

 Mat. and Rack. Trans. Lin. vol. viii. p. 204 ; Turt. Conch. Diet. p. 57 ; Delphi- 

 noidea unispiralis, Brown, 111. Conch. G. B. p. 19, pi. 8, f. 32, 33) constituted 

 from a single whorl of what was possibly a species of Skenea. 



The sinistral Turbo Icevis of Turton (Conch. Diction, p. 230) derived merely 

 from Walker's figure (35) looks something like an accidentally reversed Kissoa, 

 but what it was designed for we presume not to conjecture. 



