348 GEETACEOUS PELECYPODA 



all specimens, and should have been better indicated in fig. 30, for whicli see the 

 corrected fig. 9 on pi. xlix. 



Localities. — Shillagoody and Olapaudy, in conglomeratic sandstone. 



Formation, — Arrialoor group. 



2. AxiN^A LEYicuLA, StoUczM, PI. XLIX, Eigs. 5-6. 



Ax. testa siib-orbiculata, cequilaterali, crassiuscula^ umhonihus parvis, tumidis, 

 valde approximatis et area Ugamentali brevi instructa, postice ad medium vix sub- 

 angulata ; valvis convexis, sub-levigatis, striis minutissimis et confertissimis concen- 

 tricis et nonnuUis sulcis incrementi profundioribus, prope peripheriam sitis, prceditis, 

 superficie paulo erosa striis sen lineis impressis, angustis^ radiantibus notata ; 

 margine interno denticulato. 



Height of shell about equal to its length. 



Thickness of shell : its length . . , . , . ... ... 0'66 



This species differs from A. subplanata by its considerably more rounded form 

 and the greater convexity of the valyes. In the perfect shell the surface is quite 

 smooth, but when slightly worn off the usual radiating lines appear. The liga- 

 mental area is very small and very oblique, so that the beaks come very close 

 to each other. 



Localities.— ATTidloov^ in soft whitish sandstone ; Fondicherry, in a greenish 

 grey compact sandstone ; rare. 



Formation.— AixidlooT group. 



3. AxiNJEA ALTiuscuLA, Stoliczlca, PL XLIX, Eig. 9. 



Ax. testa sub-rotundata, fere cequilaterali, paululum obliqua, altiore quam 

 long a ^ valva sinistra moderate convexa, crassa^ sub-lcevigata, sulcis incrementi 

 precipue prope peripheriam distinctis, paulo irregulariter continuis, prcedita ; area 

 Ugamentali latiuscula^ valde declivi ; dentibus cardinis crassis, 9 in utroque latere, 

 elongatis, mediis multo minoribus ; margine interno denticulate . 



Height of left valve : its length ... ... ... ... 1-08 



Thickness „ : „ ... ... ... ... 0*20 



The somewhat greater height in proportion to length; the greater convexity 

 of the valves and solid structure readily distinguish this species from, subplanata, 

 and the first difference also holds good in a comparison with Ax. levicula. It is 

 closely allied to Zittel's Ax. norica from the Gosau, but less convex, apparently a 

 little more oblique, and without the distinct and coarse radiating striation which 

 characterizes the European species. 



Localities.— Ooi^aoil and Ninnyoor, in a pinkish limestone (evidently coral-, 

 reef-limestone). 



Foi^mation, — Arrialoor group. 



