104 



The exhibition of the collection ofShelU formed by Mr.Cutning on 

 the H'estern coast of South America and in the South Pacific Ocean 

 was resumed, and the follovving new species were characterized by 

 Mr. Broderip and Mr. G. B. Sovverby, 



Genus Chiton. 

 * Ligamento marginis Jaevi. 



Chiton bipunctatus. — Chit. testd ovatd, leevi, virescente, nigro, al- 



bidoąue varid ; margine concolori, plerumque maculd alhd utrin- 



que inter valvam primam et seciindam posita : long. \, lat. \poll. 



Hab. ad oras Peruviae. (Inner Lobos Island.) 



Found under stones at low \vater. This species varies rauch in 



its colouring, some specimens being nearly black, others Hght 



green, and some much and prettily varied. In almost all a white 



mark may be observed on the raargin just behind the anterior 



valve.— G. B. S. 



Chiton eziguūs. Chit. testd oblongd, minimd, rufescente, an- 



gustd ; valvarum. intermediarum carind dorsali latissimd, tri- 



gond, margine sulcatd ; arearum lateralium margine disiinctd : 



long. -y\, lat. -rV poli. 



Hab. in Polynesia. (Lord Hood's Island.) 



Found on the Pearl OyUers. This is the smallest species which 



Mr. Sovverby has seen : the dorsal keel of the intermediate valves 



is very broad, and distinguished by a groove on each side. — G. B. S. 



Chiton catenulatus. Chit. testd oblongd, pallidd, virescente va- 

 rid ; valvd anticd, valvarum intermediarum areis lateralibus et 

 valvee posticee parte posticd radiatim granulosis ; intermediarum 

 areis centralibus et posticee ared anticd longitudinaliter scabroso- 

 sulcatis : long. -rV, lat. -^^-^ poli. 

 Hab. ad oras Peruviie. (inner Lobos Island.) 

 Found under stones at low water. In general appearance this 

 species resembles Chit. luridus : by careful attention to the above 

 characters it may however be readily distinguished. — G. B. S. 



Chiton graniferus. Chit. testd ovatd, castaned, nigro albidogue 

 varid ; dorso elevato ; valvd anticd radiatim granosd ; valvce 

 posticee parte posticd et valvarum intermediarum areis lateralibus 

 subradiatim graniferis ; areis centralibus longitudinaliter granoso- 

 lineatis : long. \, lat. i\ poli. 



Hab. ad oras Chiliae. 



A single specimen was found on a Mytilus in nine fathoms water 

 at Couception. — G. B, S. 



** Ligamento marginis squamoso. 

 Chiton stramineus. Chit. testd ovatd, lavi, pallide stramined; 

 dorso rotundato į sguamulis marginalibus sparsis : long. -^, lat. -rV 

 poli. 

 Hab. ad Insulam Chiloe Chilensium. 



Found under stones at \o\v vvater. All the specimens are of a 

 uniforni pale straw colour.— G. B. S. 



