144 TELLINID&. 
umbones yellow, interior white round the margin and_bright-yellow 
between the muscular impressions and up to the umbones. 
Height, 1-5);sleneth, 175. 
North Island only. Chatham Islands. 
Very close to 7! denticularis, Sowerby, from Japan. Reeve gives the 
Philippines as the habitat of Z! dzsculus. 
T. subovata, Sowerby; Reeve, Conch. Ic., f- 160; TZ: lintea, 
Hutton, C.M.M., p. 67. Shell snow white, half pellucid, equally com 
pressed, rather squarely ovate, smooth, not flexuous; posterior side 
rather short, with the dorsal margin sloping, truncated at the end; 
posterior angle nearly obsolete ; ventral margin rather straight ; anterior 
side oblong, dorsal-margin sloping, excavated near the umbones, very 
obtusely angular at the end; cardinal teeth small, no lateral teeth ; 
ligament partly imbedded (Reeve.) 
Stewart Island. 
T. ticaonica, Deshayes, P.Z.S., 1854, p. 358;. Reeve, Conch. Ic., f. 
304. Shell small, elongato-ovate, transverse, compressed, hyaline, very 
thin, inequilateral, shining, polished, the whole pale rose colour; anterior 
side longer, obtuse, rather convex above, inferior margin parallel ; 
posterior side short, truncated, sub-angular below; ligament short, 
prominent ; hinge very narrow ; double tooth small, bifid in the right 
valve ; pallial sinus large, deep, above much angled, ascending under 
the umbones (Deshayes.) 
Stewart Island. Philippines (Cuming.) Australia. 
T. strangei, Deshayes, P.Z.S., 1854, p. 362. Shell ovato-sub- 
trigonal, rather convex, thin, pellucid, inequilateral, pale yellow, trans- 
versely very finely lamellated, and regularly decussated with longitudi- 
nal striz; lamelle regular, equidistant, short; anterior side longer, 
above scarcely declining, obtuse ; posterior a little attenuated, obtuse, 
hardly flexed, inferior margin regularly convex; umbones small, hardly 
prominent, lunule small, scarcely excavated, lanceolate, smooth ; lateral 
teeth large, sub-equal, equi-distant (Deshayes. ) 
New Zealand (Cuming. ) 
T. glabrella, Deshayes, P.Z.S., 1854, f. 366; Reeve, Conch. Ic.,f. 
296; Smith, Voy. Erebus and Terror, pl. 2, f. 7. Shell ovato-trigonal, 
transverse, compressed, thin sub-equilateral, chalk-white, epidermis pale 
yellowish, unequally obsoletely transversely striated ; anterior side longer 
semt-elliptical, obtuse, convex above and below; posterior side attenu- 
ated, trigonal, above straight and declining ; inferior margin straight in 
the middle, arched at the ends; umbones acute; flexure narrow, 
scarcely visible ; hinge narrow, bidentate, teeth unequal, small, laterals 
none ; pallial sinus deep, gibbons above, then declining (Deshayes). 
New Zealand (Cuming). 
Genus, CAPSELLA~ Gray. 
Shell ovate oblong, transverse, rounded at both ends, covered with 
a greenish epidermis ; ligament short, external ; margin of valves entire. 
