324 CEETACEOUS PELECYPODA 



ficie concentrice minute et confertim striata^ mnbonibiis parvnlis^ approximatis ; 

 dentihus cardinis numerosis, fovea triangiilari sub apicem divisis. 



Height ofsMl : its length ... ... ... ... 0-53. 



Thickness „ : „ ... ... ... ... 0*29. 



This species is allied to the recent Yoldia Thraciformis, but is of smaller size 

 and has the striation stronger. It seems to be a very rare shell, as only a single 

 specimen of a left valve exists in our collection. I have, therefore, given an enlarged 

 view of Eorbes' original. As to general form the species would be taken for a 

 Neilo, but it has distinctly a small cartilage pit below the umbo and no trace of 

 a ligament. 



Locality. — North of Karapaudy, in a soft coarse sandstone ; Pondicherry. 



Formation, — Arrialoor group. 



2. YoLDiA OBTUSATA, Stoliczlm, PL XVII, Pigs. 7-10. 



Y. testa ovato elongata, ttimida, sub-incequilaterali, antice sub-rotundata^ postice 

 paulttlum longiore^ sub-truncata et prope marginem superiorem indistincter sulcata, 

 lunula lata, medio paulo elevata, lateraliter applanata, concentrice confertim striata 

 et nonnullis sulcis profundioribus prcedita ; car dine dentibus numerosissimis in utroqtie 

 latere fovece parvce instructo. 



Height of shell : its length... ... ... ... 0-66 



Thickness „ : „ ... ... ... ... 0"59 



Easily distinguished from F. sub-rectirva, PhilL, and other allied species by 

 its' more inflated form and very numerous and small hinge-teeth. 



Locality, — Karapaudy, in soft, coarse, whitish sandstone; not common. A 

 similar and perhaps identical species also occurs in the coarse sandstones near 

 Streeparmatoor. 



Formation,— A.mdlooT group. 



3, YoLDiA SCAPHULOIDEA, StoUczha, PI. XVII, Pigs. 11-12. 



Y, testa elongata, sub-tumida, sub-incequilaterali, antice rotundata, postice 

 sub-caudata, sensim attenuata et compressiuscula, sub-sulcata, margine areali 

 concavo, area angusta, deplanata, umbonibus tumidulis, actiusculis, approximatis 

 inst7ntcta ; superficie concentrice confertim regulariterque striata ; cardine dentibus 

 numerosis prcedito. 



Height of shell : its length ... ... ... ... 0-61 



Thickness „ : „ ... ... ... ... 0*35 



This species is very like the Neocomien Y. scapJia^ d'Orb., but is distinctly 

 less elongated. It differs from striatula by being more attenuated posteriorly, and 

 from obttisatahj being a much more compressed shell. 



Locality, — Comarapolliam, in soft whitish sandstone; apparently rare. 



Formation. — Arrialoor group. 



