APPENDIX. 269 



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

 opalina. 



Vol. iii. p. 158. Skenea? nitidissima. 



Several conchologists believe this shell to be identical with the 

 Helix hicolor 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. 5S ; Turbo 

 hicolor, Flem. Brit. Anim. p. 301 ; S2:>ira hicolor, Brown, 111. 

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



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

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

 obscurely defined, " Testa Igevi, 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. IGl. Skenea? divisa. 



This curious shell and some allied forms, referred to Shenea 

 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 Acleorbis, 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 aflinities. 



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

 wrinkled proboscidal muzzle. The tentacula are long, flattish, 



* Amongst others may be specified the Helim tuhidata (Lin. Trans, vol. iii. 

 p. G7, 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 tuhulatus, 

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

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

 imispiralis (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 ; DdpM- 

 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 Skcnca. 



The sinistral Turho IcBvis of Turton (Conch. Diction, p. 230) derived merely 

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

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



