OF KACHH AND KATTYWAR. 29 



posterior interradium near the peristome. Near the periproct the ornamentation is 

 small, and especially posteriorly to it on the ridge. 



Length of the test 77 millim., breadth 71 millim., height 33 millim. Apical disk 

 9 millim. in front of centre. Breadth of peristome 11 millim., and breadth of periproct 

 13 millim. 



Locality. Kachh. Nummulitic series. One mile east of Goir, near Narainsir ; from 

 bed with Pecten and Nummulites. Survey-number C 043 B f. 



Illustrations of the Species in Plate II. 



' Fig. 9. The test, abactinal surface : natural size. 

 10. The ornamentation : magnified. 



Plate III. 

 Fig. 1. The actinal surface : natural size. 



The dimensions of this form in height, breadth, and length somewhat resemble 

 those oi EcMnolampas discoidevs, d'Archiac and Haime, from the Nummulitip of Sind. 

 The differences in structure are the more tumid posterior part of E. discoideus and its 

 want of any marginal tuberosity ; and the tumid nature of the actinal surface around 

 the peristome of the new form constitutes a decided distinction. It has also a larger 

 periproct, that of E. discoideus being small. 



The new form has not the lateral symmetry or the small peristome of EcMnolampas 

 discus, which is altogther more circular in outline. It is distinct from, but represen- 

 tative of, EcMnolampas Osiris, Desor, sp., from Egypt. 



7. EcHmoLAMPAS iNsiGNis, Duncan 8f Sladen. Plate III, Figs. 3-6. 



The test is large, almost circular in actinal outline, conical above, flat in anterior 

 slope, nearly as broad as long, and about one half as high as broad. The relative 

 proportions are — length as to breadth 1 : 0"966, and length as to height 1 : 0-488. 



The apical system is at the highest point of the test, and is about 3 millim. in 

 front of the centre. The test slopes with a gentle curve on either side of the apex to 

 the tumid margin, and has a decided flattish slope in front, which contrasts with the 

 gentle posterior curve of the test. The margins are tumid or rounded, and most so 

 in front and behind the periproct, where there is some flatness. The test reposes on the 

 rather convex actinal surface within the limits of the margin. The peristome, 11 or 

 12 millim. broad, is sunken, large, much broader than long, and has the posterior 

 bourrelet the broadest, and the postero-lateral very small ; the antero-lateral are the 

 most tumid, but all are slightly developed. The periproct is large, elliptical, with a 

 greater anterior than posterior curvature; it is broader than the peristome, ai;d is 

 close to the posterior part of the test and inframarginal. The test is less convex 

 between the periproct and peristome than elsewhere actinally. 



The apical system is large, circular in outline, a little tumid centrally, but sunken 



