3L 
CE ETA CEOUS ECIIIXODE 11 MATA 
IX. Gonns. — NUCLEOLITES, Jjciinarck, 1801. 
Tlic species of this genus avc mostly of very small size, of a roundly ovate or squar- 
ish shape, moderately elevated and eonvex above ; posteriorly suhtruncate, below 
llattened and concave, with an eccentric apex and lanceolate, straight unequal 
))etals extending to near the margin ; pores not yoked or connected by grooves ; anus 
in a superior furrow, more or less nearer the apex than the posterior end; genital 
pores four, ocular five ; mouth eccentrie, somewhat irregularly rounded or penta- 
goiiiil, with the lobes either quite rudimentary or mostly entirely absent ; the oral 
amhulacral pores arc also generally very imperfectly developed. 
The typical JSucleolites have the mouth regularly pentagonal, while those, called 
Trematojjygus by d’Orbigny, have it somewhat irregularly angular and oblique, but 
as no other difference exists in the tests, Dcsor suggested to unite both under the 
former name. Echinobi'issus has also a perfectly similar test, hut the pores in the 
petals are yoked. Representatives of the genus are mostly found in cretaceous 
and tertiary deposits, only two or three species arc known recent. In the South 
Indian cretaceous deposits a solitary sjrecies occurs. 
XrcLEOLiTE.s ruLLATUS, SloUczkci. PI. YI, Fig. 2. 
Nuc. testa late et depresse ovata, justice tmneata, svpra fere uniforme convexms- 
cida ; apice eccentriee antieo ; snperficie crassius tuberculata petalis lanceolatis, duobits 
yjosticis C(Bteris panto lonyioribns, angnlo 45° divergentibns, quoque circa dnodecim 
paria porornni exhibente, p^oris minimis, ap)p7'oximatis ; ano in sulco longo pro- 
fundoqne sito, circa tertiani piurtem totkis longitudinis testce a margine postico dis- 
lante ; apertnra eccenlrica, pentagona, immersa, regione cb'cumorali depressa, vei'sns 
marginem apertnree declici ; petalis oralibus indistinctis ; snpeificie infera post-oi'uli 
linea irregnlari, panto elecata atqne minute granulata dicisa, 
Sqjecwiinis majoris long. 15, lat. 11 ’5, altitndo 5 5 rmn. 
The peculiar broadly ovate and posteriorly truncate shape in connection with 
the depressed form, and the comparatively very long anal sulcus, separates the pre- 
sent little species from all known NucleoUtes which I have had opportunity to compare. 
The tubercles arc rather large as compared rvith the size of the test, and there is a 
narrow, elevated, somewhat irregular and finely granular line separating the lower 
posterior half of the surface and connecting the edge of the aperture -with the hinder 
margin of the test. 
Locality. — South-west of Mulloor, in a greyish sandstone; only two specimens 
were found, the smaller of which, being the more perfect one, is figured. 
Formation . — Arrialoor groiq). 
( 104. ) 
