LAMELLIBBANCHIATA. 



25 



MYTILICARDIA. 



63. M. excavata, Beslmyes ; Cat. Marine Moll, p. 76. 

 Localities. — Shakespeare Cliff. 



ASTARTE. 



Hinge with two diverging cardinal teeth in one valve, and one in. 

 the other. 



64. A. australis, sp. nov. Solid, inequilateral, rather produced 

 and flattened behind, umbones triangular ; distantly concentrically- 

 ribbed ; lunule impressed, elongato-lanceolate ; hinge very large, right 

 valve with two cardinal teeth, the anterior large and strong, the pos- 

 terior small. 



Localities. — Kokohu. 



Family — Uxioxid^ . 

 UNIO. 



Shell equivalve, inequilateral ; hinge with cardinal teeth, and elon- 

 gated laterals ; ligament external. Fresh water. 



65. U. aucklandica, Graj/, Dieff. N.Z., ii., p. 257. Oblong, 

 compressed, rounded in front and rather obliquely truncated behind ; 

 finely concentrically striated ; umbones small ; superior margin arched 

 behind; inferior margin straight. Height, '9; length, VQ. 



Localities. — Coal formation, Dunstan, Otago. 



As the teeth cannot be seen, the identification of this species is 

 doubtful. 



66. U. inflata, sp. nov. Oval, ventricose, rounded in front and 

 behind ; finely concentrically striated and somewhat corrugated ; 

 umbones inflated ; superior and inferior margins arched. Height, 

 1 25 ; length, 2. 



Localities. — Morely Creek, Southland. 



Family — Myteliid^. 

 MYTILUS. 



67. M. mageUaniCUS, Lamark; Cat. Marine Moll., p. 77. 

 Localities. — Motanau (r) ; AVanganui (u) ; Shakespeare Clift'. 



CRENELLA. 



68. C. disCOrS, Lamarh; Cat. Marine Moll, p. 78. 

 Localities. — Shakespeare Clift*. 



69. C. elongata, sp. nov. Elongato-oblong ; umbones quite 

 anterior, rather inflated ; median smooth area about one-third of the 

 length; anterior and posterior ends finely radiately striated; anterior 

 end rounded, not projecting as far as the umbo ; posterior end com- 

 pressed, truncated, its dorsal margin slightly arched. Height, '35 ; 

 length, -6 ; thickness, '25. 



Localities. — Broken Eiver (l). 



£ 



