432 CEETACEOUS PELECYPODA 



3. Pecten Verdachelleksis, Forbes, PI. XXXI, Figs. 13*— li,* PI. XLIT, 



Pigs. 7-8. 



1846. Fcctcn VerdachcUensis, Forbes, Trans., Geol. Soc, Lond., vii, p. 154, pi. xiv, fig. 5 — idem auctorum. 



Feet, testa sntj-orbicularl sen orbiculato ovata, cequivalvi, vctlvis lente convex'ms- 

 cidis, costidls et striis radlantlbits, tenulhus, confertissimis, squamose spinulosis, ornat is, 

 in valva dextra frequentiorihus qiiam in sinistra; cmriculis sidj-cequalibus, rudiatiiti 

 costnkdis. 



A very densely radiately costulated, sub-orbicular species, the ribs being un- 

 equal, often sub-divided and covered with very numerous, fine, spinulose scales ; they 

 are generally on the right valve more numerous and often also thinner than on the 

 left one ; the concentric strife are only at certain distances somewhat better marked. 



Loccdities. — Ootatoor, Puravoy, Moraviatoor, in brownish earthy limestone. 



Formation. — Ootatoor group. 



4. Pecten Arcotensis, Stoliczha, PI. XXXI, Figs. 18 — 19. 



Feet, testa ovato-orbicidata, antice jjaidttlum dilatata, ceqidvaloi, valcis costidis 

 radiantibus crassulis, simplicibus, interdum minoribus indistinctis alternant ibus, et 

 concentrice striis acidis, confertis, in costulis squamidosis, ornata ; auriculis anticis 

 paidulum majorihis, radiatim costellatis, posticis minoribus, obliqids. 



This differs from the previovis species by its comparatively much stronger 

 costulation and slightly more oblique shape. 



Locality. — Stripermatur, in a ferruginous conglomeratic sandstone. 

 Formation. — Arrialoor group. 



5. Pecten [Chlamys] asperulinus, Stoliczka, PL XXXI, Figs. 10 — 11, 



PL XLIV, Fig. 5. 



Fecten testa sub-orbictdari, cequilaterali, valvis modice et fere aiqiuditer paululuin 

 convexiuscidis, radiatim 11-15 costatis, costis latis, sidcisprofundis angustissimis sepa- 

 ratis, medio maxime elevatis, ttibercnlis sqtiamosis ant sub-spinosis ornatis, in utraque 

 declivitate 3-4- costidatis, costidis incequalibiis, confertissime squamidosis, costnla prima 

 ad cristam medianam sita tenuissima, secnnda fortiore, tertia teniii ant obsoleta, 

 quarta, sen injima, fortissima ; auricnlis sub-cequalibus, modicis, radiatim costidatis, 

 ti'uncatis, antica valvce dextrcs ad basin emarginata. 



This species may be said to represent the common European Fecten asper 

 in India ; it is very closely allied to it, but the lateral ribs on the slope of each large 

 rib are somewhat different. In as2)er the one next to the median tuberculated 

 crest is the strongest, or it is separated from it by only a very thin rib ; in aspe- 

 rtdiniis the last rib adjoining the median furrow is the strongest. The scales are 

 on the secondary ribs of the Indian species very thin, and numerously crisjiate. 



* In these figures the radiating ribs are a little too strongly marked ; they should be thinner and more unequal ; 

 their character is well shown in the enlarged view (fig. 11 i) of a portion of well preserved surface. 



