350 CEETACEOUS PELECYPODA 



confertissimis et ciUeris mmutiorihits radiuntihus oniata ; area cardinall Icviter 

 curvuta, multklentata. 



Only tlie two figured specimens have been found of this species; the one 

 (on pi. S) is large, somewhat irregularly gibbose, and has portions of the shell pre- 

 served; the other is a smaller, but complete cast of the left valve. The fine 

 reticulated surface of the shell is very peculiar and mostly characteristic of this 

 genus, as already noticed. 



Localities.— Evi^t of Parally, in a brownish earthy limestone ; north of Odium, 

 in a similar but still more earthy rock. 



Formation. — Ootatoor grovip. 



CUCULLiEA, Lamarch, 1801, (see p. 337). 



1. (?) CucuLLiEA ^QUATA, Stoliczka, PL XVII, Fig. 34. 



C. testa rotundate suh-tetragona, moderate conve.va, ccquilalerali, stih-lceingata, 

 antice ac postice minute radiatim striata, solidula ; cardo iuntroque latere dentibus 

 iribits suh-iKirallelis, panlo ir regular ibus, instructus. 



The only valve yet found has been figured ; the beak and the ligamental area 

 are imperfect, and they must have been very small. The hinge shows about three 

 sub-horizontal riljs on either side, becoming somewhat irregularly connected near 

 the middle, but, on the whole, resembling those of recent and fossil species of 

 Cucidlcea; however, as the ligamental area is not preserved, I do not regard 

 the generic determination as sufficiently certain, for the shell may represent a new 

 generic type. It is to be hoped that the discovery of better specimens will clear 

 up these doubtful points. The form of the shell is so characteristic that it could 

 not easily be mistaken for any other genus, excepting Axincsa. 



Locality. — Ninny oor, in a yellowish sandy limestone. 



Formation. — Arrialoor group. 



MACRODON, Lgcett, 1815, (see p. 33G). 

 1. Macrodon ( ? Geammatodon ) Japeticum, Forbes, PL XVIII, Pigs. 6-11. 



1846. Area japetka, Forbes, Trans. Geol. Soc, Lond., vii, p. 118, pi. xvi, fig. 2 — eadem auctorum (non = 

 A. disparilis, d'Orb.). 



Mac. testa elongata, jyertiimida, crassissima, obliqua, antice bi'eviore et snb-rotitn- 

 data, postice producta, oblique truncata, regione ab apice ad terminationem postero- 

 inferiorem extensa siib-angulata seu obtuse carinata ; superficie striis crispiculatis et 

 sulcis incrementi tenuioribus et fortioribus tecta, medio radiatim costata : costis 

 in valoa dextra conspicuiter distantioribas interdumque ininoribus alternant ibus, in 

 valva sinistra magis apiproximatis ; omninis in terminatione antica et postice si/b- 

 obsoletis ; declivitate p)ostica minute striata, sub-excacata, ad medium costula tenui 

 ab uinbone postice extensa, prope peripheriam obsoleta, divisa, striis in speciminibus 



