Cheeseman. — On the Mollusca of Auckland Isthmus. 173 



176. D. flahelUfera, Cheeseman. On corallines near low water- 



mark ; scarce. 



177. -D. luctuosa, Cheeseman. On seaweeds ; two or three 



specimens only. 



178. Chromndoris aureo-marginata, Cheeseman. On seaweeds 



near low water-mark ; a few specimens only. 



Doridopsidae. 



179. Doridopsis citrina, Cheeseman. On seaweeds and coral- 



lines ; the most abundant Nudibranch in Auckland 

 Harbour. 



180. I), mammosa, Abr. Zostera beds, but not common. 



Class III.— LAMELLIBRANCHIATA. 

 Order I.— DIMYARIA. 



Teredinidae. 



181. Teredo (intarctica , Hutton. Boring in piles, etc. ; much 



too abundant. 



Boring in sandstone rocks ; plen- 

 tiful. 



Pholadidae. 



182. Barnea similis. Gray. 



183. Pholadidea tridens, Gray.' 



Saxicavidee. 



184. Saxicava aiistralis, Lam. At the roots of Ecklonia radiata 



and other sea- weeds ; not common. 



Corbulidae. 



185. Corbula zealandica, Quoy et Gaim. Can be dredged in 



great abundance in the deeper parts of the harbour. 



Anatinidae. 



186. Myodora striata, Quoy et Gaim. Sandy places below low 



water-mark. 



187. Anatina angasi, Sow. Muddy places below low water- 



mark ; rare. 



Mactridse. 



188. Mactra discors, Gray. Not common. 



189. Hemiinactra ovata, Gray. Deep mud by the side of tidal 



channels. 



190. H. notata, Hutton. A few specimens picked up on the 



beach near Lake Takapuna. 



191. Zenatia acinaces, Quoy et Gaim. Mud-flats below low 



water-mark ; not uncommon. 



