OP SOUTHEEN INDIA. 219 



y/ 6. Caedium [ ? Pectuncultjs] scrobiculatum, Stoliczha, ri. XI5 Pig. 14. 



C, (? Feet,) testa parvula, rotundate quadrangulari^ suh-equilaterali antice diS' 

 tincter^ inflata, in utroque latere fere cequaliter convecca ; infra ac postice lentissime 

 curvata, sen sub-truncata, umhonibus prominuUs, latis, incurvis, superficie polita^ 

 suh4cBvigata^ striis concentricis ac radiantibus minutissimis ac confertissimis^ vix cons- 

 picuis, notata. 



Height of shell : its length ... ... ... ... I'OS 



Thickness „ : „ ... ... ... (approximately) 077 



This small species is characterized by its somewhat greater or equal height in 

 proportion to length, rather strong convexity,* and the polished surface, which to 

 the eye only appears to be minutely punctured. However, under the lens very fine 

 decussating striae can be observed, and w^hen the glazed surface of the shell is re- 

 moved the radiating lines become well visible. Though the few specimens examined 

 are small, they do not appear to belong to a particularly young shell, but to a 

 naturally small species. It is possible that the species is a Lcevicardium^ but more 

 specimens are required before that question can be satisfactorily answered. 



Locality, — Garudamungalum, in bluish calcareous sandstone, with various small 

 species of shells ; rare. 



Formation. — Trichinopoly group. 



PEOTOOAEDIUM, Bey rich, 1847, (vide p. 209). 



y 1. Protocaedium hillanum, Soicerby, PI. XII, Pigs. 8-10, and PL XIII, 



Pigs. 1-3. 



1813. Cardium hillanum, Sow., Min. Conch., i, p. 41. 



1865. „ „ apud Zittel, Denksch. Acad., Wien, xxiv, pt. 2, p. 146,~cwm synon. 



Trot, testa crassa^ sub-rotundata^ sub-cequilaterali^ umbonibus paulo promi- 

 nentibus^ obtusatis, incurvis, approximatis instructa, antice ac infra rotundata, 

 postice oblique truncata ; superficie costulis concentricis confertissimis approximatis 

 Icevigatis et in regione postica 12-18 costis radiantibus, distantioribus prope marginem 

 superiorem ohsoletis ornata ; f uteris incrassatis ; impressionibus muscularibus pro-^ 

 fundis ; sinu pallii postico parvo. 



Height of shell : its length ... ,., .., varying from 0* 80-0* 94 



Thickness „ : „ ... .., ... „ „ 0-61-0-77 



There is, as already recorded by Prof. Porbes, no difference to be observed 

 between specimens from Europe and those from South India ; they agree in every 



^ It ought to be about IJ m. m. more than shown in figure 14a; and in fig. ]4 the posterior margin should be 

 slightly more truncate. 



