OF SOUTHERN INDIA. 447 



mulose sub-tuberculatis out confertls, et cBquidistantibtis, ant j^i^uciorihus et snb-dis- 

 tantibus, omnibus simpUcibus ; valoa svpera plano-concavmscula, ad umboneni 

 paululum tmnidula, distinctius auricidata, primo radiatim graiiulato striata, postea 

 costulata, costulis Us in valva altera shnUlbus. 



The lower valve is in this species always convex, truncate, and attached at the 

 beak with a larger or smaller area. The upper valve is variable ; on the whole, it is 

 concave, but the upper part, corresponding to the place of attachment, is either 

 plain or slightly tumid. This portion of the valve is also differently ornamented 

 from the rest. The radiating lines on it are thin and finely granular, while the 

 remaining portions of both valves are covered with much strongei% scaly, and sub- 

 tuberculated ribs, all equal in size, bvit either more numerous and eqviidistant, 

 or in smaller numbers and, towards the periphery, more distant from each other. 

 The form of the shell greatly resembles Fl. spimosa, Mant., but the ribs are com- 

 paratively always more numerous, and less spinose. 



Localities. — Ootatoor, Odium, and Moraviatoor, in yellowish brown or dark 

 brown earthy limestone ; not common. 



Formation. — Ootatoor group. 



5. Plicatula septemcostata, Forbes, PI. XLVIII, Pig. 4. 



1816. Plicatula septemcostata, Forbes, Trans., Geol. Soc, Lond., vii, p. 155, pi. xviii, fig. ii—eadem auctorum. 



P. testa sub-obliqiui, sub-orUciilari, convexiusciila, incequivalvi, longitudinaliter 

 (=^ radiatim) costata, costis septem majoribus, sitb-angulatis, fsub-squamosisj ; apiice 

 affixa, (Forbes, I. cit.J. 



I am unable to add anything to the knowledge of this species ; there is no 

 specimen of it in our collection. The lower valve is slightly more convex than the 

 upper one, and both are similarly and equally strongly ribbed. 



Locality. — Pondichei*ry. 



Formation. — ? Valudayoor group. 



SPONDYLUS, Klein, 1753, (see p. 441). 

 1. SpoNDYiiTJS Abrialooeensis, StoUczka, PI. XXXIII, Fig. 5. 

 Sp. testa oblique late ovata, valva inferiore late affixa, cupuliforme, mnbone 

 moderate irregulariter producta, margkie inferiore sensim elevata, radiatim costel- 

 lata et concentrice crasse lamellata ; valva sujjeriore convexa, versus marginem 

 deplanata, radiatim costellata et concentrice obsolete striata, costellis paulo incequa- 

 libus, confertis, cBquidisfanfibtis, rugulose sjnnulosis, posticis paulo fortioribiis quam 

 anticis, nonnullis fZ — 4^ crassioribus et ad intervalla spinis altis, lateraliter eom- 

 pressis, armatis ; auricuUs magnis, suh-cequalibus, szib-lcevigatis, obsolete striolatis, 

 utraqiie jyrope marginem cardinalem, fere rectum et incrassatum, costula spimdose 

 lamellosa instructa ; timbone obtuso, extra marginem paulo projiciente. 



The lower valve of this species is sessile with a broad surface on a fragment 

 of an Inoceramus ; it is rather low at the umbo, which is irregular, and with the 



