Mr. A. S. Woodward — PalceicJithyological Notes. 281 



oblique umbonal keel is much moi-e evident and acute. The 

 character of the hinge is the same. 



10. Sphenia incequaUs, sp. n. (PI. XV. A. fig. 10.) B.M. 



Testa valde injequivalvis, subtrigona, aequilateralis, antice rotundata, 

 postice rostrata, conccntrice rugose striata, alba, epidermide tenui 

 pallide lutea plus minus induta ; valvae mediocriter crassso, sinisti'a 

 fere plana praeter umbonem versus, dextra conspicue major, pro- 

 funda, postice carinata, edentula ; dens cardinalis valvte sinistroe 

 compressus, mediocriter validus ; pagina interna alba, incrassata ; 

 cicatrix antica elongata, postica ovata. 



Longit. 11 millim,, alt. 8, diam. 4|. 



Hab. Singapore. Coll. Cuming. 



This species, judging from 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 Corhula ; 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 Bmghanii, 



Figs. 2, 3. RUppellii. 



Figs. 4, o. fragilis. 



Fig. 6. perversa. 



Fig. 7. Sphenia pacijica. 



Fig. 8. Sowerbgi. 



Fig. 9. similis. 



Fig. 10. inaqualis. 



L. — Palceichihyological Notes. By A. Smith WOODWARD, 

 F.L.S., of the British Museum (Natural History). 



[Plate X.] 

 1. On some Ichthyolites from the Keuper of Warivickshire. 



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 



* Dictyoinfgc si/pemtes, I']gerton, Quart. .Journ. Geol. Soc. vol. xiv. 

 p. 164, pi. xi. figs. 1-3 (I'a/o'oniscus) ; and Semionotus Brodiei, E. T. 

 Newton, ifjtd. vol. xliii. p. ')3y, pi. xxii. figs. 1-8. 



