Sutek. — Result of Dredging for Mollusca. 357 



62. Rochefortia reniformis, u. sp. Plate XXVII, fig. 12. 



Shell small, elongately oval, fairly solid, equivalve, inequi- 

 lateral, compressed, minutely reticulated. Beaks small, sharply 

 pointed, adjacent, directed backwards ; prodissoconch minute, 

 oval, smooth and shining. Anterior end longer, its dorsal 

 margin slowly descending and faintly convex, anterior margin 

 regularly convex ; posterior dorsal margin straight, sloping ; 

 posterior margin convex, similar to the anterior margin ; basal 

 margin straight, with a slight sinus in the middle. Sculpture 

 consisting of subequal and inequidistant strong concentric 

 riblets, sharply rounded, with the interstices of about the same 

 width ; as they recede from the beak they are getting much 

 stronger and more distant ; some well-marked periods of rest are 

 usually visible at regular intervals ; radial fine threads are re- 

 ticulating the concentric sculpture. Epidermis thin, light- 

 brown. Colour light - brown, Avhitish when the epidermis is 

 lost. Interior white, porcellaneous, the growth-periods well 

 marked, the margins smooth. Hinge with a triangular resilifer 

 under the beaks ; right valve with 2 divergent strong and 

 elevated cardinals, the anterior with a pectinated edge ; left 

 valve with 2 dorsal narrow laminae, the posterior of which is 

 triangularly elevated. Ligament consisting of an internal re- 

 silium only- Adductor-scars fairly large. Pallial-line simple, 

 uninterrupted, distant from the margins. 



Length, 7-2 mm. ; height, 5 mm. ; diameter, 3 mm. •-.<■■« 



Type from Hauraki Gulf, in my collection. 



Mostly small valves were obtained. 



63. Mactra scalpellum, Reeve. 

 Conch. Icon., vol. viii, 1854, pi. xix, fig. 106. 



A few small valves. 



64. Chione stutchburyi (Gray). 



Venus stutchburyi, Gray, in Wood's Index Test., Suppl., 1828, 

 fig. 4. 



A few valves. 



65. Chione mesodesma (Quoy and Gaimard). 



Venus mesodesma, Q. and G., Voy. " Astrolabe," Zool., vol. iii, 

 1835, p. 532, pi. lxxxiv, figs. 17-18. 

 A few valves. 



66. Dosinia subrosea (Gray). 

 Arthemis subrosea, Gray, in Yate's N. Zeal., 1835, p. 309. 

 One small valve. 



