OF SOUTHEEN INDIA. 101 



SILIQUA, 3Ie(j. v. Ililhlfeld, 1811 (see p. 95). 



1. SiLiQUA LIMATA, StoUczka, PI. I, Eigs. 12-13. 



Sil. testa valvis elongatis, siih-convexis, valde iiueqidlateraUbus, antice ac justice 

 siibrottmdatis atqiie angustatis, tenuibns, polltis, concentrlce minute striails, utraqne 

 iiif/is sub-umbone casta crassiuscula oblique postice versus fere ad marginem ventralem 

 decurrente instructa. 



Height of shell : its lonsth ... ... ... ... 0-32 



This species is closely allied to S. Fetersi, Reuss, from the Alpine Gosaii 

 formation, bnt is narrower in proportion to its length and the valves are per- 

 ceptibly more convex. The posterior end of the valves is extremely thin and breaks 

 off very easily, in which case the shell appears to be rather more truncate than 

 it is natm'ally. The rib under the umbones is very strong as compared with the 

 size of the shell. Of the hinge only indistinct impressions are traceable, the 

 teeth themselves must have been very minute. 



Locality. — South-east of Parchairy and Garudamungalum ; at both localities 

 in a compact highly calcareous brownish or bluish sandstone, in company with a 

 very large number of small shells. 



Formation. — Trichinopoly group. 



PHARELLA, Gray, 1851, (see p. 96). 



1. PflARELLA DELICATULA, StoUczka, PL I, Fig. 14. 



Th. testa elongata, angusta, tenuissima, valde incequilaterall, antice sub-rotundata, 

 postice oblique truncafa, margine dorsali ac ventrali fere parallelis, umbonibus paiilo 

 promintdis, linea elevata ab itmbonibtis oblique postice ac antice decurrente, prima 

 distincta, altera fere obsoleta ; sitperficie lineis conceiitricis mimitis notata ; impres- 

 sione mtisculari antica pyriformi, postica amjustata ac elongata. 



Heif;ht of one valve : its leiijith ... ... ••• •■■ 0'2'5 



This is a remarkably thin shell ; in form and the shape of the muscular im- 

 pressions it agrees with a narrow species of Fharella. The pallial sinus appears to 

 have been very short, but is not clearly traceable on any of our specimens ; neither 

 was it possible to observe the hinge-teeth. 



Locality. — South-east of Parcliairy. 



Funintlioii. — Trichinopoly group. 



2. Pharella obscura, Forb., sp., PI. I, Fig. 15. 



1846. Solecnrtus ohscurus, Forbes, Trans., Geol. Soc, London, vii, p. 141, pi. xvii, fig. 3— idem anctorum. 



Ph. testa elongata, valde ino'quilaterali, ximhonibus promimdis , acutis, eorumque 

 margine ventrali opposito lenle insinuato instructa, antice rotundata, postice oblique 

 truncata ; superficie striis concentricis, crassioribus et tenuioribus ornata ; impres- 

 sione musculari antica atque postica jiyi'iformi, prima breviori, altera elongata; sinu 

 pallii brevi. 



Height of shell : its length ... ... ... .■■ 030 



The compressed, elongated, and rather high shell, ornamented with coarsely 

 lamellar concentric stria?, is very characteristic for this species. It has been 



2 B 



