262 T7-ansactioHS. 



65. Pecten convexus, Q. and G. 

 Voy. " Astrolabe," Zool., vol. iii, 1835, p. 443, pi. 76, figs. 1-3. 

 A few fragments only. 



66. Pecten zelandise, Gray. 

 DiefEenbach's Travels in N.Z., vol. ii, 1843, p. 260. 

 A good number of small valves. 



67. Ostrea reniformis, Sowerby. 

 Conch. Icon., 1871, fig. 57. 

 Valves of young specimens. 



68. Modiolus australis, Gray. 

 King's Voy. Intertrop. Coasts Australia, vol. ii, 1827, p. 477. 

 One damaged valve only. 



69. Modiolaria impacta (Hermann). 



Crenella impacta, Herm., Spengler in Naturforscher, vol. x, 1776, 

 pi. 6, fig. 8. 



A few valves. 



70. Pectunculus laticostatus, Q. and G. 



Voy. " Astrolabe," Zool., vol. iii, 1835, p. 466, pi. 77, figs. 4-6. 

 One valve only. 



71. Anomia furcata, n. sp. Plate IX, figs. 9-10. 



Left valve circular to oval, sometimes irregular, convex, 

 thin, semitransparent, radiately costate and with distinct coji- 

 centrie ridges. Beak distinct, nearly smooth, and more or less 

 central ; one specimen (fig. 10) has a deep posterior notch, 

 another example has three deep posterior notches, and two 

 shallow ones on the anterior end. The dorsal margin is either 

 straightened or flatly convex. The sculpture consists of narrow, 

 nodulous radial riblets, obsolete in some places, and mostly 

 bifurcating towards the margin. The concentric ornamenta- 

 tion is formed by fine, close, and slightly undulating fines of 

 growth, interspersed with distant stronger ridges. Colour 

 whitish-yellow. Interior of the same coloiir and somewhat 

 pearly, with a sharp and smooth margin. There is a well- 

 marked transversely elongate ligamental fossette. The upper 

 byssus adductor scar is long, tongue-shaped, the lower small 



