22 
CRETACEOUS ECIIINODERMATA 
1. Cardiaster orientalis, StoliczJm. PI. IV, Figs. 1 — 2. 
Card, testa elongate cordata, modice elemta, apice antero-ceiitrali, snlco anteriore 
panto, ad perlplierkan profunde, excavato atqne fere verticali, laterihus rotundate 
angulatis I reglone mediana interamhulacrali ac postapicali suh-angulata, termina- 
tionem versus declivi; laterihus testcc convexe decUvibus ; apertura transverse ovali, 
magna, inimersa ; regione post-orali large ovata, cotivexiuscula ; superficie supera in- 
(cqualitcr granulifera, ad apiceni atque ad angulos laterales sulci antici spai'se tuher- 
culata, infra regionihus anticis et lateralihus sparse, reg. post-orali densius mimitiusque 
tuherculata i poris genitalihus niagnis ; poris in serie postica amhidacrorum antero- 
lateralium Us serieni anticam componentihus multo majoribus, inter se inccqualibus, 
sulculo angusto Icevi junctis, paribus singulis pororuni serie granulata se2)aratis ; poris 
in seriebus anibulacrorum postero-lateraliimi primo etiam valde incequalibiis, postea 
periplieriam versus sub-ceqiialibus ; fasciola laierali ad periplieriam sita, minutissime 
granulifera. 
Test clongatcly cordate, most eleratcd along the central longitudinal axis, ndth 
convexly sloping sides ; apex antero-central ; anterior amhulacral sulcus first sliallow, 
then very deep and rapidly descending to the periphery, its lateral angles somewhat 
rounded ; mouth large, somewhat immersed, rather anterior ; post-oral space much 
elongate, convex. The upper surface is covered with very fine and slightly larger 
granules ; near the apex and along the inner side of the angles of the anterior furrow 
arc some large tubercles interspersed ; the lower surface is sparingly, hut on the 
anterior end and laterally rather largely tuherculatcd ; on the post-oral region the 
tubercles are, except near the aperture, smaller and closer together. All the four 
genital plates have very large openings ; the madreporiform is the largest and is in 
immediate contact with all the other three. The ambulacra gradually become very 
indistinct towai'ds the periphery, the antero-latcrals diverge under an angle of about 
132 degrees, and the postcro-latcrals under an angle of only about 40 degrees. In 
the former the pores composing the posterior series are much larger than those of 
the anterior series ; they are situated in a slight depression, and the inner of them 
are again smaller than the outer ; both arc connected by a smooth groove, hut each 
pair is separated from the next by a row of granules. In the posterior amhulacra the 
pores are first also very unequal, hut towards the periphery the difFcrence in size 
becomes less conspicuous ; the pores in each pair are situated towards each other so 
as to form an angle. The fascicle runs quite close to the periphery, and is composed 
of very small granules. It is only jiartially traceable in one out of three specimens. 
The elongate shape, very gradual slope of the sides, and the groat inequality 
in the amhidaeral ])ores are good distinguishing characters of this sjieeics, as com- 
pared with others. 
Localities . — Arrialoor, in grey, fine-grained sandstone ; near Karapaudy, in a 
yellowish i-athcr coarse sandstone ; and in a brownish sandy-oolitic rock near Ola- 
paudy; one specimen from each locality, the largest is from the last, and has a 
length of about 70 mm. 
Formation. — Arrialoor group. 
( 9 ^ ) 
