201 Mr. Frcmbly on some species ofChilones. 



smooth dorsal line coiidnues itself along the middle valves, on each 

 side of which are very fine striae parallel to it. Border smooth, 

 thin, semi-pellucid, marbled, colours very bright when alive. 



Length li inches, breadth IJ^, Common under stones and on 

 the rocks at Valparaiso Bay, but is rarely found in exposed situ- 

 ations. 



11. Chiton lineolatus. 



C. tests, oblongo-ovata, antice subattcnuata, la^vi, pallide rufo- 

 fulva, lineolis undulatis concentricis picta : areis valvarum late- 

 ralibus indistinctis, minutissime punctulatis. 



Tab. Supp. XVII. f. 7. 



Shell oblong-ovate, rather tapering towards the anterior valve, 

 light reddish brown, marked with undulated concentric lines of a 

 dark brown colour ; inside white, except the beaks, which are 

 purple. Valves eight beaked, posterior divisions rather indis- 

 tinct, very finely punctured and granulated, the fifth valve gene- 

 rally with a broad brown dorsal line.* 



Border cherry coloured, similar to the preceding. Length one 

 inch and three quarters, breadth one inch ; not quite so common 

 as the last, but found in the same situations. 



Considerable variation is observed in the markings of this spe- 

 cies, some of them having the lines partially or wholly obscured. 



The great affinity between this and the last species, leaves 

 some doubt of the propriety of separating them. I shall, however, 

 leave it for more experienced Conchologists to decide, whether 

 the constant linear markings are sufficient to warrant a specific 

 designation. 



12. Cliiion Chilensis. 



C. testa oblongo-ovM^, antice subattenuata, crassa, laevi, opaca, 

 fusci ; ligamento marginali corlaceo, laivi, crasso; valva autic^ 

 posticaque semilunatis, levitcr punctatis : valvis intermediis 

 linea granulata ab apice ad anguluni anticum decurrente. 



* Amongst upwards of lOOspecinKiis, but two exceplious occurrtd. 



