13 
Measurement :—Anterior to posterior, 214; umbones to 
ventral margin, 14; thickness (valves united), Ee millim. 
Hab. :—Constable Hill (Saldanha Bay), S.E. by E., 10 miles ; 
depth, 55 fathoms. Bottom, mud. 
eaniparéd with 7. Gilchristi this shell is of a thinner sub-: 
stance, white without rays of colour, more oval in form, and 
the umbones are situated nearer to the posterior end. 
TELLINA VIDALENSIS, n. sp. (Plate VII., fig. 5). Shell trans- 
versely oblong, slightly compressed, convex towards the 
umbones, very inequilateral, salmon colour, concentrically, 
very finely, closely and somewhat irregularly grooved ; anterior 
dorsal margin long, convex, slightly oblique ; posterior short, 
obliquely sloping; anterior lateral margin rounded, posterior 
angular; ventral margin obliquely convex. Umbones small, 
closely approximating, slightly posteriorly inclined, situated 
near the posterior end of the shell. Ligament rather short. 
Interior light rose pink, smooth; hinge and muscular scars 
normal. 
Measurement :—Anterior to posterior, 153; umbones to 
ventral margin, 84; thickness, 44+ millim. 
Hab.:—Cape Vidal, N.E. by N., 9 miles; depth, 13 fathoms. 
Bottom, sand and shells (two specimens). 
A donax-shaped shell, of an obliquely oblong form and pink 
colour, with very faint indication of rays. It does not seem. 
to bear a close resemblance to any known species. 

TELLINA (MaAcoMA) LEVIOR, n. sp. (Plate VII., fig. 6). Shell 
rounded, convex, nearly equilateral, thin and light, iridescent, 
concentrically very finely striated, and ridged with nearly 
obsolete growth lines; posterior obtusely angled and slightly 
flexuose ; dorsal margin slopingly convex on each side ; anterior 
lateral margin rounded, posterior obtusely angled; ventral 
margin slightly oblique towards the posterior end, then roundly 
convex. Umbones small, rather prominent, close together. 
Cardinal area impressed, with a rather narrow ligament 
occupying half the length. Interior white, smooth ; abductor 
sears and pallial line normal, but somewhat indistinct ; hinge 
line narrow, with three diverging cardinal teeth in each valve, 
and thin laminz in place of lateral teeth. 
Measurement :—Anterlor to posterior, 16; umbones to 
ventral margin, 14; thickness (valves united), 8 millim. 
Hab. :—Amatikulu River Mouth, N.W., 74 miles; depth, 
26 fathoms. Bottom, mud. South Head, Tugela River, N. by 
W. 43 miles; 25 fathoms. 
