86 Macteay Memoria Vouume. 
Lepa concinna, Adams, Pro. Zool. Soc. 1856, p. 48; Reeve, Conch. Icon. fig. 15. 
Locality.—W anganui. 
Lepa rastipiosa, Adams, Pro. Zool. Soc. 1856, p. 49; Reeve, Conch. Icon. fig. 31 ; 
L. semiteres, Hutton, Trans. N.Z. Inst. Vol. IX. p. 598. 
Locality.—Petane. 
Genus SOLENELLA. 
SoLENELLA AUSTRALIS, Quoy and Gaimard, Voy. Astrolabe, Zool. III. p. 471, 
pl. uxxvm1. figs. 5-10; Reeve, Conch. Icon. fiz, 4; Voy. Erebus and Terror, 
Moll. pl. 1. fig. 13. 
Locality.—Petane. 
Genus ARCA. 
Arca pgcussata, Sowerby, Pro. Zool. Soc. 1833, p. 18; Reeve, Conch. Icon. fig. 81. 
Locality.— Wanganui, Petane. 
Genus POROLEDA. 
This is a genus lately formed by Professor R. Tate. 
Porotepa Lanceoiata, Hutton, Trans. N.Z. Inst. Vol. XVII. p. 332 (Scaphula *) 
Shell small, thin, compressed, smooth, much elongated, not keeled behind, 
very inequilateral. Anterior portion short, rounded. Posterior portion elon- 
gated, gradually tapering, truncated at the end. Posterior dorsal margin straight. 
Hinge line straight posteriorly, curved anteriorly, edentulous in the centre. 
Eight anterior and eleven posterior teeth, all nearly parallel to the hinge line. 
The three or four most anterior teeth are short, all the rest are elongated. 
From the umbo a narrow concave cartilage pit slopes very obliquely backwards 
and divides the two sets of teeth. Length 18mm. ; height 6mm. 
Described from a right valve only. 
Locality.—Petane. 
Genus PECTUNCULUS. 
Percruncunus Laticostatus, Quoy and Gaimard, Voy. Astrolabe, Zool. III. p. 466. 
pl. txxvu. figs. 4-6 ; Reeve, Conch. Icon. fig. 8. 
Locality.—Wanganui, Petane, Matapiro, Patea. 
