Oliver. — Mollusca of the Kermadec Islands. 555 



Variations from Type. — The number of ribs varies a little, and may be 

 as high as 15 on each valve. The largest specimen collected measures 

 3 mm. by 4-4 mm. 



Habitat. — Dredged alive near Sunday Island (E. S. Bell). 



Codakia bella (Conrad). 



Lucina bella Conrad, Journ. Acad. Sci. Phila., vii, 254, 1834. 

 Eecorded, Iredale, Pro. Mai. Soc, ix, 72, 1910. 



Habitat. — Live specimens fairly plentiful in sand in rock-pools, Meyer 

 Island. 



Distribution. — Australia, Indo-Pacific region. 



Diplodonta zelandica (Gray). 



Lucina zelandica Grav in Yate's N.Z., 309, 1835. 



Eecorded, Iredale, Pro. Mai. Soc, ix, 72, 1910. 

 Habitat. — Dead shells found on the beaches, Sunday Island. 

 Distribution. — New Zealand, Tasmania, Australia. 



Lasaea miliaris Philippi. 



Lasaea miliaris Philippi, Wiegman's Archiv. f. Natur., 51, 1845. 

 Eecorded, Iredale, Pro. Mai. Soc, ix, 72, 1910. 

 Habitat. — Extremely abundant living among the alga Corallina offi- 

 cinalis on rocks between tide-marks, Sunday Island. 



Distribution. — New Zealand, Lord Howe Island, North Atlantic, Cape 

 of Good Hope, Magellan Straits. 



Ervilia bisculpta Gould. 



Ervilia bisculpta Gould, Pro. Bost. Soc. N.H., viii, 28, 1861. 

 Eecorded, Iredale, Pro. Mai. Soc, ix, 72, 1910. 



Habitat. — Dead shells found on the beaches, Sunday Island. 

 Distribution. — Australia, Hawaii, Japan, Philippines. 



Spisula belliana n. sp. Figs. 48 and 48a. 



Description of Type Specimen. — Left valve large, solid, somewhat ventri- 

 cose, trigonal, slightly inequilateral. Posterior dorsal margin arched, 

 anterior straight. Basal margin regularly arched. Anterior and posterior 

 ends subangulated. Posterior dorsal area flattened and laterally bluntly 

 angled. Lunular area lenticular, well defined. Beak incurved, acute. 

 Hinge : Cardinal bifurcating below, lateral laminae high, stout, depression 

 between cardinal and anterior lateral deep. Eesilifer obliquely triangular, 

 apex acute. Ligament very short. Adductor-scars deeply impressed, an- 

 terior the smaller. Pallial sinus extending about half-way to the anterior 

 adductor, posteriorly coalescent with the pallial line. Epidermis thin, 

 horny. Sculpture: There are regular smooth concentric riblets, most 

 prominent at the margins (the apical region is worn smooth and without 

 epidermis). Colour white ; epidermis yellow with reddish-brown spots. 



Diameter — Dorso-ventral, 64 mm ; ant.-post., 83 mm.; transverse (to 

 plane of margin), 17 mm. 



Variation from Type. — Eight valve with 2 small cardinals coalescing 

 above, 2 anterior and 2 posterior lamellae, the anterior the longer. 



Habitat. — Two valves found washed up on the beaches, Sunday Island 

 <E. S. Bell). 



