392 Transaction? . 



Fam. FrssuRELLiD^:. 

 Emarginvla striatula, Quoy and Gaimard. 



Suter records this in Trans. N.Z. Inst., vol. xxx, p. 326. 



Subemarginu 7 a intermedia, Reeve 

 Dead shells in shell-sand. 



Incisura lytteltonensis, E. A. Smith. 



Not uncommon in seaweed-washings. Lives on Cystophora, sp. 



Scutum ambiguum, Chemnitz. 

 Common at low-water mark. 



Fam. Tkochid^;. 

 Trochus viridis, G-melin. 



tiaratus, Quoy and Gaimard. 

 Not uncommon on rocks ; more plentiful in summer ; 

 tiaratus scarcer than viridis. 



Trochus oppressus, Hutton. 



Very rare ; under stones in deep rock-pools. 



Monodonta cethiops, Gmelin. 



atrovirens, Philippi. 



nigerrima, Gmelin. 



morio, Troschel. 



coracina, Troschel. 



lugubris, Gmelin. 

 Abundant ; some species local ; on and under stones between 

 tide-marks. 



Monodonta corrosa, A. Adams. 



corrosa undulosa, A. Adams. 

 corrosa plumbea, Hutton. 

 Live together on mud-flats. 



Cantharidus purpuratus, Martyn. 



purpuratus texturatus, Gould. 

 Rarely met with ; stragglers on rocks at low water. 



Cantharidus tenebrosus, A. Adams. 



tenebrosus huttoni, E. A. Smith. 

 Abundant on seaweeds ; the latter on Zostera beds. 



Cantharidus pupillus, Hutton. 

 dilatatus, Sowerby. 

 On seaweeds in rock-pools ; the latter scarcer ; tin- former 

 also found in roots of DurviUea. 



Gibbula .nitida, Adams and Angas. 

 suteri, E. A. Smith. 

 On seaweeds in rock-pools ; the latter much the commoner ; 

 both rarer than the two preceding. 



