144 



roseo et incamato concinne variegata ; valvis rostratis ; areis 

 lateralibus elevatis, serie postica squamarum et serie obliqua 

 squamarum majorum ad apicem spectantium finitis ; intervallo 

 Isevigato, et granulis paucis annulatis sparso ; areis centralibus 

 plerumque Isevibus sed punctis sparsis triangularibus retrospec- 

 tantibus confossis ; valva posteriori valde gibbosa, umbone fere 

 terminali, dentibus insertionis 9, et ad valvam anteriorem 25, pec- 

 tinatis : margine fusco, carnoso. Long, f , lat. f poll. Hab. Fee- 

 jee Islands. 



Allied to C. sculptus, Sowb., which has three lateral rays and 

 the central areas smooth. 



Chiton prijinosus. Testa parva, oblongo-elliptica, convexo- 

 elevata, subcarinata, coloribus variis olivaceis, cinereis, et fusco- 

 rubris irrorata et maculata ; areis centralibus sub lente omnino 

 quincuncialiter punctatis ; areis lateralibus longitudinaliter im- 

 bricato-striatis : intus virescens : margo minutissime granulatus, 

 coloribus fuscis et cinereis tessellatus. Long, y^g-, lat. /^ poll. 

 Hab. Rio Janeiro. 



The sculpture of this very variably-colored species is suffi- 

 ciently characteristic. Between the stria? are usually found 

 minute pores, probably produced by some parasite. 



Chiton viridulus, (Couthouy MS.) Testa tenuis, oblongo- 

 ovata, dilutissime olivacea, ad dorsum sub-carinata, utrinque sub- 

 canaliculata, ubique sub lente quincuncialiter insculpta ; areis 

 centralibus et lateralibus parum distinctis ; lineis incrementi prope 

 marginem conspicuis ; valvis terminalibus leviter radiatis : margo 

 minutissime squamatus. Long. -|, lat. /g- poll. Hab. Orange 

 Harbor. 



Chiton petaloides. Testa parva, tenuis, ovalis, arcuatim 

 elevata, subcarinata, dilute citrina ; areis lateralibus elevatis, ru- 

 gose granulatis, et striis radiantibus ad 4 insculptis ; areis centra- 

 libus longitudinaliter rugose granulato-punctatis, et lineolis tenu- 

 issimis angulatis dilute violaceis pictis ; valva posteriori acute 

 umbonata et costa transversali divisa : margo stramineus, minutis- 

 sime granulato-imbricatus. Long. ^, lat. § poll. Hab. Sand- 

 wich Islands. 



A very beautiful and peculiar shell, its markings resembling 

 the venated petals of some flowers. 



