KUNGL. SV. VET, AKADEMIENS HANDLINGAR. BAND 52. w:o I6. 27 
rays or flames; area extended and narrow with some transversal brown spots. Inside 
white with a light rosy tint in the median part. Lunula narrow, bounded by a 
deep furrow. 
The shape of this shell recalls a Macrocallista or a Tapes, but the coarse sculp- 
ture is that of a Chione, except for the fact that it has only feebly indicated poster- 
ior prominences or lappets on the costae. 
Circe plana n. sp. (Pl. 1, figs. 2325). Shell somewhat squarely rounded in 
outline, highly compressed, sculptured with coarse concentric ridges towards the 
under margin; umbonal part smooth, diagonally slightly wrinkled at the sides; 
colour pale yellowish with two diverging rays of brown dots on the upper half and 
angular brown stripes on the lower half of the shell, the colouration being more 
obvious on its inside. Dimensions: |. 31, h. 29, thickness (valves closed) 4.6 mm. 
Locality: 45 miles W. 8. W., 48 feet (*7), 1 sp. 
The difference between this form and C. scripta Linnb, of which it is perhaps 
only a variety, lies chiefly in its considerable compression from the sides, and the 
fewer, but coarser, concentric costae, which number about 20 in all. A typical C. 
scripta of about the same size has these proportions; 1. 35.5, h. 29.5 thickness 9.5mm, 
and its finer and denser concentric ribs are about 32 innumber. As to theinterior, it 
is remarkable that in C. plana both the anterior side teeth of the right valve run in the 
prolongation of the foremost cardinal, while in C. scripla they form together a slight 
curve. Even in the soft parts there seem to exist differences, as in C. plana the 
posterior adductor has a length =3 times its breadth, and the posterior gill is about 
‘4, of the anterior one in breadth, while in C. scripta the posterior adductor has a 
length of scarcely twice its breadth, and the posterior gill is about '/s of the anter- 
ior one in breadth. 
FAM. PETRICOLIDAE. 
Naranio lapicida Cuemnirz. 42 miles W. S. W., 66 feet ("'/7), 1 sp., L 7.4 mm, 
Distribution: Persian Gulf, Red Sea, Mauritius; Gulf of Siam to Queensland—S. Au- 
stralia; Florida and Lesser Antilles (LyNGE 1909). 
FAM. CARDIIDAE. 
Cardium (Trachycardium) foveolatum Sownrey. 45 miles W. 8S. W., 66 feet 
(1/2), 1 sp., 1. 10 mm. The specimen agrees with the figure in ROMuER (1869, MARTINI 
& Curemnitz, Conch. Cab. Pl. 11, fig. 8) and his description (p. 65) better than with 
fig. 87 in Reeve (Conch. Icom. 2, 1844), where the shape is more produced than in 
the present specimen. Rurryve records the species from Swan River. 
C. (Laevicardium) lyratum Sowrrsy. 45 miles W. S. W., 66 feet ('%/7) 1 
sp.,l. 6mm. Though of small size the present specimen shows distinctly the character- 
