EXPEDITION SHELLS. 



Chiton lignosxjs. Testa solidula, ovata, tectiformis, cassia, 

 lineolis fuscis inequalibus subradiantibus marmorata, systemate 

 duplici punctorum majorutti et punctorum minorum impressa ; 

 valvis planulatis, angulatis, sine rostris ; areis lateralibus haud 

 elevatis, vix distinctis ; valva anteriori parva ; valva posteriori 

 vix umbonata : intus aeruginosa. Long. 1^-, lat. £ poll. Hab. 

 Puget Sound, 



Has the form of C. setiger, and somewhat the coloring of 

 Cfulvus, Wood. It is also allied to C. tulipa, Quoy. 



Chiton quercinus. Testa depressa, ovalis, vix carinata, quer- 

 cina, maculis olivaceis nubeculata ; valvis subrostratis ; areis late- 

 ralibus vix elevatis, longitudinaliter sulcatis, sulcis incumbentibus 

 et sulco radiante bisectis ; areis centralibus ad latera lineis rugosis 

 longitudinaliter sculptis, ad dorsum punctatis ; valva anteriori sulcis 

 concentricis et sulcis radiantibus remotioribus decussata ; valva 

 posteriori prope marginem umbonata ; margine lato, pruinoso, 

 flavescente. Long. £, lat. § poll. Hab. New South Wales. 



Allied to C. foveolatus, Sowerby. 



Chiton jugosus. Testa ovalis, carinata, tectiformis, nitida, 

 coloribus pallide et saturate herbeis variegata ; valvis planulatis, ad 

 apices adunco-acuminatis; areis lateralibus prominentibus,et lineo- 

 lis confertis parallelis viridibus longitudinaliter notatis ; areis cen- 

 tralibus sulcis acutis parallelis longitudinaliter aratis, sed ad ver- 

 ticem simplicibus et minutissime punctatis ; valva anteriori con- 

 centrice lineolata ; valva posteriori umbonata, prope marginem 

 concentrice lineolata, praMer aream terminalem triangularem 



