Sutek. — Result of Dredging for Mollusca. 355 



49. Dacrydium radians, n. sp. Plate XXVII, fig. 11. 



Shell small, equivalve, inequilateral, inflated, oblong and 

 very high, semitransparent, thin and fragile, radially finely 

 ribbed. Beaks very small, rounded, directed forwards ; pro- 

 dissoconch small, broadly ovate, concentrically very finely 

 striated. Anterior end vertical, straight, dorsally sharply 

 rounded, posterior end moderately convex, its dorsal part slop- 

 ing and straightened, basal margin acutely convex. Lunular 

 area broadly flattened. Sculpture consisting of numerous fine 

 flatly rounded radial riblets of equal strength and equidistant, 

 the interstices of the same width as the riblets ; these are 

 crossed by fairly regularly spaced distant concentric sharp 

 ridges. Colour white. Interior slightly nacreous, showing the 

 radial sculpture ; margin minutely crenulate. Posterior hinge- 

 plate narrow, straight, sloping, with numerous small teeth, 

 slightly increasing in size as they recede from the resilifer, the 

 anterior hinge-plate beginning suddenly with a small tubercle 

 behind the beak, narrower than the posterior plate, curved, 

 with numerous small teeth. Ligament internal. Anterior 

 adductor-scar beneath the dorsal margin, oval and high ; pos- 

 terior scar at the end of the hinge-plate. 



Length, 3-5 mm. ; height, 5-5 mm. ; diameter, 1-6 mm. 

 The largest valve. 



Type in my collection. • 



^ A. number of valves. 



50. Pecten medius, Lamarck. 

 Anim. s. Vert., vol. vi, 1819, p. 163. 

 A few small valves. 



51. Myochlamys convexus, Quoy and Gaimard. 



Peoten convexus, Q. and G-., Voy. "Astrolabe," Zool., vol. iii, 

 1835, p. 443, pi. lxxvi, figs. 1-3. 



A number of valves. 



52. Myochlamys radiatus, Hutton. 

 Pecten radiatus, Hutt., Cat. Mar. Moll., 1873, p. 82. 

 Many small valves. 



53. Cuna delta (Tate and May). 



Carditella delta, T. and M., Trans. Roy. Soc, S. Austr., vol. xxiv. 

 1900, p. 102. 

 A perfect specimen and a few valves. 



