or SOUTHERN INETA. 
33 
The antero-lateral amhulacra diverge, as usually, ixnder a very large angle 
(about 140°), while the postero-laterals form an angle of only about 40°, whicli 
angle increases at the periphery to about 40°. The lobes round tlie pentagonal aper- 
ture are also unusually strong. The phyllodia ovate, having two sliglitly larger 
pores at their base, between eacli two lobes ; all tlic lobes are connected by a raised 
]nargin of the aperture. Two conspicuous swellings extend from the two anterior 
oral lobes forward, disappearing towards the margin. The lower median gi'anular 
portion of the test is also somewhat uneven, and the end is in adult specimens 
considerably bent downwa)‘ds. 
Localities . — North of Roodoopolliam, in a yellowish sandy limestone; Arrialoor 
and near Andoor, in a coarse sandstone ; near Yailoor, in a whitish marl ; tolerably 
common at the first, rare at the three other localities. 
Formation. — Arrialoor group. 
5. Cassidtjlus planatus, CForhes). PI. YI, Pig. 1. 
1846. y^ucleolitcs (Pygorliynchus) planatu.'s, Forbes, Trans. Geol. Soe., Lond., vii, p. 1()2, pi. 19, fig. 3. 
1847. Pygor/iyitc/ius idem, Agassi-i; d’Orbigny, Desor, et auctorura. 
C. testa ovata, postice paulmn contr acta, depresse convexa,post apicem altissima, 
undique convexe declivi, reyione anali suhtruncata, peripheria rotnndate ohtusa, 
•infra snhplana, medio sensirn depressa, lateraliter crasse tuherciUata, medio atque 
sup)erficie supera dense granulatim tiihercidifera ; apice subcentrali, pauhim antico ; 
ports genilalihiis quatuor minute perforatis ; petalis ad termina Hones vix contractis, 
antico cceteris inter se subceqnalibus pauluni longiore, in nna serie pororiim circiter 
iHtria pororum gerenle, serie una qmlalorum, lateralimn poris circiter 27 composita, 
petalis antero-lateralihns angulo l postero-lateralibus angido 54° dicergentibiis ; 
stdeo anali fere certicali, otalo, bred, baud usque ad marginem peripdierice e.vtenso, 
diniidium altiludinis testa; paidum superante, ano latiuscido, oviilato ; apertura 
pentagona, lobis crassis circunidata ; ambidacris oralibus elongate ovatis. 
This species is intermediate between C. enigs and crassus, differing from the 
former by a more rounded periphery, subcentral apex, by an ovate and almost vertical 
anal slit ; from the latter, in addition to the last character, by a more broadly ovate 
and more depressed shape. The lower side is not strongly but moderately concave, 
especially round the aperture, which is surrounded by very strong lobes, while the 
oral ambulacra are clongately ovate, terminating with two larger pores between 
each two lobes near the edge of the mouth. 
Localilg. — Moraviatoor, in a dark earthy limestone. 
Formation . — Ootatoor group. 
( 103 ) 
