464 CHETACEOUS PELECYPODA 



specimens most closely resemble some of the figures given by Reuss in his Biihm. 

 Kreidef., pi. 27. Reuss refers these specimens from the Plsener-limestone to 

 Nilsson's E. lateralis, and is followed in this by Coquand, but it seems more pro- 

 bable that they belong to the present species. 



Localities. — North by east of Odium, in a silicious sandstone (smaller valve), 

 west by sovith of Illpagoody (in a brown finely oolitic soft rock (three larger valves). 



Formation. — Ootatoor group. 



In Europe E. canaliculata characterizes the middle series of cretaceous deposits. 

 It was found in the greeusand of England, in the Carentonien and Rotomagien 

 of France, and in similar beds of Belgium and Germany. 



GRYPH.EA, Lamarck, 1801, (see p. 454). 



1. Gryph.ba Poodoorensis, StoUczka, PL XXXV, Fig. 5. 



Grijph. testa reynlariter ovato elongata, vaha majore vioderute tumida, fere 

 ceqnilateraU, umhone valde incurData, intorta, costiUis radiantibiis fcirciter 16J, 

 intei'spatiis multo latioribus separatis, et striis incrementi tenuibus, ornata. 



Only the figured specimen has been examined of this interesting species ; its 

 larger valve is nearly quite regularly ovately elongated, moderately convex, 

 gradually sloping posteriorly, with the beak strongly incurved, but barely twisted; 

 the surface is ornamented with rather thin, radiating ribs separated by much broader 

 interspaces. Striae of growth very fine. The smaller valve has not been seen. 



Locality. — Near Poodoor, in a pinkish limestone. 



Formation . — Ootatoor group. 



The only cretaceous species which bears some resemblance to the Indian fossil 

 is Ostrea Cerberus of Coquand (Monog. Ostr. cret., p. 106, pi. Ixvi, figs. 3 — 4), 

 but the ribs in that species are much stronger and fewer in number. 



2. Gryph-EA Arrialoorensis, Stoliczka, PI. XLV, Figs. 13 — 14, and PI. XL, 



Fig. 9. 



Gryiili. testa linguiformi ctmata, apice snb-obtiisa, piostice rotundata ; valva 

 inferiore fdextraj convexiuscula, jjrope umbonem scepissime sessill, umhone aut hidis- 

 t'nicto aut breciter intorto ; valva altera vix minore, planulata, vertiee nonnunquam 

 mammillato : ombabus sub-lcevigatis, striis incrementi siib-lamellatis tectis, viarginibus 

 internis prope unibones minute crenulatis. 



A small linguiform and smooth species, with the lower valve moderately 

 convex and usually attached near the umbo, which is small, cither indistinct, or 

 laterally incurved. The upper valve is only a little smaller than the lower, and 

 sometimes with a mammillate apex, but not twisted. 



