OF KACHH AND KATTYWAK. 63 



2. EcHiNOLAMPAS Wynnei, Buncan & Sladen. Plate IX, Figs. 11, 12. 



The test is long, narrow, ovoid, narrower behind, depressed, much more tumid abac- 

 tinally anteriorly than posterior to the excentric in front apical system. The slope is 

 sudden to the tumid margin in front and also to the sides from the apical system, 

 which is at the highest point, and the slope is more gradual posteriorly. 



The profile from the front is bluntly angular above,, curved at the sides at the 

 ambitus, and narrowed and level inferiorly. The margin is tumid except posteriorly 

 in the median line and on either side of it, where the test is nipped-in somewhat. 

 There is a slight angularity on the margin, far back in the lateral interradia. 



The apical system, which is at the highest point, is excentric in front, and is well 

 developed. The ambulacra are unequal, very slightly raised, the narrow poriferous 

 zones being sunken. The odd ambulacrum is short, narrow, and open. The antero- 

 lateral ambulacra are exceedingly broad and short, but longer than the odd one ; their 

 anterior poriferous zone forms a bold curve convexity forwards, and the posterior zone, 

 nearly equally curved at first, has the convexity backwards ; it is longer than the anterior 

 by many pairs of pores, and thesfe curve in the opposite direction. The poriferous zones 

 have the pairs of pores rather widely apart, and the costse are stout and carry a row 

 of granules. The pairs diminish in breadth towards the end, and become more distant. 

 The pores are large, and the inner series are more circular in outline than the outer. 



The posterior ambulacra are the longest, but they are not so wide as the lateral ; 

 they are petaloid and broad except where the posterior zone tends to approach the other, 

 which is prolonged nearer the margin. The ornamentation of the interporiferous areas 

 is crowded and small, and hardly differs from that of the interradia close by. 



Actinally the test is swollen between the rather sunken peristome and the margin. 

 The peristome, excentric in front, is pentagonal, not much broader than long, and is 

 deep, with granular walls. The bourrelets are well developed, and the lateral are the 

 smallest and the most projecting; the posterior is the widest, but does not project so 

 much as the anterior; their rim projects, and is ornamented with small tubercles 

 resembling those of the peristome-wall. 



The phyllodes are petaloid and somewhat sunken ; two pores are at the peristomial 

 end, and beyond is a succession of double pores, and there are pittings in the median 

 line of each phyllode for sphseridia. The periproct is elliptical and transverse, and 

 opens downwards and backwards ; it is inframarginal, transgressing on the margin, and 

 is visible from behind. The ornamentation of the actinal surface is close and crowded, 

 middle-sized at the margin, larger nearer the peristome, and largest in the interradia 

 close to the phyllodes. 



Length 49 millim., breadth 41, height 22. 



Eelative dimensions .-—Length 1, to breadth 0-83, to height 0-44. 



Locality. Miocene series : Wamiiti, Kachh. Survey-number C 190 f. 

 Illustrations of the Species in Plate IX. 

 Fig. 11. The test, from above. 

 12. Actinal view. 



