OF KACHH AND KATTYWAE. 25 



The height of the type is 44 millim., the breadth 58 millim., and the length 62 

 millim. ; and these dimensions give the relation of length to breadth 1 : 0-95, height 

 1:0-709. 



It follows, that the relative dimensions of this form are not very diverse from those 

 of the species just described {Echinolampas alto). 



But the present species is not a young form of the last ; and the narrow poriferous 

 zones, the sinuous postero-lateral ambulacra, the tumid free peristomial region, the 

 faint posterior keel, and the general roundness of actinal contour cause it to differ 

 specifically from E. alia. 



Locality. Kachh. Nummulitic series ; from the same geological horizon as Echino- 

 lam'pas alta. Survey-number C 050. 



Illustrations of the Species in Plate I. 

 Fig. 8. The test, side view : natural size. 

 9. Abactinal view : natural size. 



10. Part of an ambulacrum : magnified. 



11. A postero-lateral ambulacrum : magnified. 



Illustration of the Species in Plate III. 

 Fig. 2. Actinal view : natural size. 



There are several specimens of this form in the collection, and they present con- 

 siderable variation. In one form with the Survey-mark C 050 f (B) the greatest 

 breadth is behind the peristome, the apical system is more central, and there is a more 

 evident tendency on the part of the ambulacra to close. In another, which is slightly 

 taller than the type, the more central apical system is seen, and the top of the test is 

 less rounded. 



This species is also a representative of the tall African Nummulitic Echinolampads ; 

 and the resemblance of the actinal area to that oi Echinolampas Fraasi, de Loriol, is 

 remarkable. The specific distinctions are in the relative heights and the shape of the 

 posterior ambulacra, and the difference in the anterior slope of the test, together with the 

 remarkably uneven base of the Kachh species. 



4. EcHiNOLAMPAS Kachensis, Buncan & Sladen. Plate II, Figs. 1-4. 



The test is tumid above, broadly elliptical in marginal outline, longer than broad 

 and broader than high. Length of specimen 53 millim., relative length to breadth 

 1 : 0-9, and length to height 1 : 0-6. It is almost hemispherical in its profile seen 

 from the front. The highest point is at the apical system, very slightly excentric in 

 front, and the posterior slope is bolder than the greatly curved anterior. The margins 

 are rounded off but not tumid, and the posterior part is flat and in relation to the infra- 

 marginal periproct. The position of the peristome is very slightly in the rear of a 

 vertical line leading upwards to the apical system. The apical system has four 



