APPKNDIX. V 



Obs. Three of the ribs are much larger and 

 broader than the remaining- nine, and the posterior 

 part of the shell is rather flattened. 



400. CARDITA INCRASSATUS. 



C. testa oblongii, antice brevi, costis 16 incrassatis, 

 rotundatis, crenatis; interstitiis angustis. 



0Z>9. There are two specimens of this shell, 

 which do not accord with any of the representations 

 of Cardita sulcatns, though it is commonly^ known 

 by the name of Chama antiqiiata. 



531. PINNA SERRATA. 



P. testa tenui, subpellucida, cornea, costis radianti- 



bus creberrimis, concinne et minutissime murica- 



tis, latere altero acutissimo, altero retuso, mar- 



gine cardinis recto, in utraque valva serrifero. 



Obs. A most elegant shell, somewhat resembling 



P. pectinata in appearance; its most remarkable 



character is its double row of spines on the liinge 



margin. 



531a. PINNA ATRO-PURPUREA. 



P. testa atro-purpurea, costis radiantibus, muticis, 

 distantibus ; margine cardinali longitudinem late- 

 ralis sequante latere postico arcuato. 



692. CHITON LATUS. 



C. testa lata, valvis arcuatis, leevibus, creberrime 

 sulcatis, olivaceis, albido-punctulatis. 

 Obs. The locality is not known. 



693. CHITON RUGULOSUS. 



C. testa, valvarum parte mediand longitudinaliter 

 rugulosa, laterali concinne radiata. 



