Park. — On Marine Mollusca of Nelson. 301 



search of the adjoining bays, which in many instances present 

 a great variety of conditions, would discover a much larger as- 

 semblage of marine shells than that enumerated in this paper. 



In this collection the Brachiopoda are represented by 

 three species — namely, Terebratella rubicunda (rare), Magas 

 evansi (rare), and Bhynchonella nigricans (very rare). Of the 

 latter only one example was found. 



Among the fifty-two Conchifers the most common genera 

 are Mytilus, Chione, Venus, Tapes, Vola, Mactra, Mesodesma, 

 and Pecten. 



The Polyplacophora are singularly scarce, cnly two species 

 being found — namely, Chiton quoyi and Omithochiton un- 

 dulatus — and examples of these are by no means common. 



The most prominent genera of Gasteropoda are Patella, 

 Haliotis, Turbo, Diloma, Ancillaria, Natica, Trophon, Murex, 

 Struthiolaria, Turritella, and Amphibola. 



The Cephalopoda have only one representative — namely, 

 Spirida pironii. 



It may be noted in passing that the Echinodermata were 

 observed to be represented by four species — namely, Eve- 

 chinus chloroticus, Arachnoides placenta, Echinocardium zea- 

 landicum, and Echmobrissus recens. On a few occasions, 

 after heavy south-east weather, the latter was thrown on 

 the shore in thousands, but, being so fragile, perfect speci- 

 mens were not often found. 



Beachiopoda. 



Terebratella rubicunda, Sowerby. 

 Magas evansi, Davidson. 

 Bhynchonella nigricans, Soiverby. 



Lamellibkanchiata. 



Ostrea purpura, Hanley. 



„ discoidea, Gould . 

 Anomia alectus. Gray. 

 Pecten zealanclicus, Gray. 



„ gemmulatus, Reeve. 

 Vola laticostatus, Gray. 

 Lima angulata, Soiverby. 

 Mytilus latus, Chemnitz. 



„ magellanicus, Lamarck. 

 Modiola areolata, Gould. 

 Crenella mipacta, Hermann. 

 Pinna zealandica, Gray. 

 Pectunculus laticostatus, Quoy and Gaimard. 



„ striatularis, Lamarck. 



Barbatia decussata, Sowerby. 

 Tapes intermedia, Quoy. 



