Mr. A. S. Woodward—Paleichthyological Notes. 281 
oblique umbonal keel is much more evident and acute. The 
character of the hinge is the same. 
10. Sphenia inequalis, sp.n. (PI. XV.A. fig. 10.) B.M. 
Testa valde inequivalvis, subtrigona, eequilateralis, antice rotundata 
, es oe ’ 
postice rostrata, concentrice rugose striata, alba, epidermide tenui 
pallide lutea plus minus induta; valvee mediocriter crasse, sinistra 
fere plana preter umbonem versus, dextra conspicue major, pro- 
* . 2 - ae . 
funda, postice carinata, edentula ; dens cardinalis valvze sinistra 
’ 9 3 . 
compressus, mediocriter validus; pagina interna alba, incrassata ; 
cicatrix antica elongata, postica ovata. 
Longit. 11 millim., alt. 8, diam. 43. 
Hab. Singapore. Coll. Cuming. 
This species, judging trom the single specimen in the 
‘Museum, is remarkable for the great inequality of the valves, 
the left being almost flat and fitting within the margin of the 
right, which is considerably convex. In this respect it links 
Sphenia with Corbula; and the rostrate form also recalls 
certain forms of the latter. Near the inner edge of the poste- 
rior adductor a short linear oblique scar is observable; it 
probably indicates the point of adherence of the pedal 
retractor. 
EXPLANATION OF PLATE XV.A. 
Fig. 1. Sphenia Bingham. Fig. 7. Sphenia pacifica. 
Figs. 2, 3. Riippellii. Bigs 3S: Sowerby. 
Figs. 4, 5. Fragiis. Tg O) similis. 
ga) GO: -perversd. Eig. 10. mnequalis. 
L.—Paleichthyological Notes. By A. Smira Woopwarp, 
F.L.S., of the British Museum (Natural History). 
[Plate X. ] 
1. On some Ichthyolites from the Keuper of Warwickshire. 
Remains of fishes are so rarely met with in the British 
Trias, and so little is known of the genera of the period, that 
even fragmentary specimens are worthy of notice. Having 
had the privilege of examining the largest collection hitherto 
made, that of the Rev. P. ‘B. Brodie, of Rowington, the 
writer thus offers a few notes on some detached teeth and 
spines as yet unknown or incompletely described. The same 
collection has on former occasions yielded new Ganoids *, and 
* Dictyopyge superstes, Egerton, Quart. Journ. Geol. Soc. a Xiv. 
p. 164, pl. xi. figs. 1-38 (Paleoniscus) ; and Semronotus Brodiei, KE. T. 
Newton, ibid. vol. xliii. p. 559, pl. xxii. figs. 1-8. 
