186 



explanation. The materials only enable us thus briefly to 

 notice it here. 



109. T. SANDWIZENSIS, ? 



Of this T can obtain no information, except that it occurs 

 in a French catalogue. 



EXCLUDEND.E. 



T. viTTATA, Lamarck, Encyclop. pi. 402, f. 4, a. b, 

 T. GRANULOSA, Lamarck, Hist, des Animaux. v, vii. 

 p. 291. 



T. LiNEOLATA, Sowerbi/, 1. c. p. 76. 

 T. TAHiTENSis, Gray, 1. c. p. 63. 

 T. POLiTA, Gray, 1. c. p. 63. 



The synonomy of these, together with a list of the fossil 

 species, will be found in my Synopsis of the Genus contained 

 in the Proceedings of the Zoological Society for 1843, 

 p. 166—168. 



