OF WESTERN SIND. 151 



is excentric in front, but much, less so than the apical disk. It has low vertical walls, 

 which extend upwards into the interior, with the surface covered with rather large 

 uniform granules. No development of bourrelets takes place, and there is no expansion 

 of the ambulacra near the peristome, although in some specimens the semblance of a 

 phyllode is produced by the deep and conspicuous puncture of the pores in this region, 

 and more especially by the presence of large pits (probably for sphseridia) in the inter>^ 

 poriferous area near the peristome. 



The periproct is small, transversely oval and inframarginal, placed on the lower 

 part of the marginal rounding, the plane of the orifice being consequently at an angle 

 to the actinal surface, and visible when the test is viewed from behind. 



The ornamentation consists of small primary tubercles in sunken scrobicules, 

 uniformly and equidistantly distributed over the test, the interradial spaces being 

 occupied by comparatively large distinct granules, which usually form a single circlet 

 round each scrobicule, but occasionally a few intermediate granules are present between 

 neighbouring circlets or at the angles. 



Bemarlcs. This Echinoid has an unmistakable facies, diflferent from any other form. 

 It is strikingly characterized by the peculiar shape of the test, the excentricity of the 

 apical summit, and the abortion of the odd anterior ambulacrum. It differs from the 

 species found in the Eanikot strata, Eolampas anticursor, nobis, by the more depressed 

 test, by the peculiar escutcheon-shaped outline of the marginal contour, with the 

 marked expansion behind the posterior petals, by the tendency to carination along 

 the abactinal area, and the consequent subconoid profile when viewed transversely. 

 The ambulacral petals are longer and their relative proportions inter se are 

 different. 



. The form appears very constant, and is represented by a number of examples from 

 several localities. In the smaller specimens, however, the dorsal carination and the 

 depression of the test posteriorly, as well as the expansion laterally behind the line of 

 th& posterior petals, do not appear so marked. 



Dimensions. 



a. h. c. 



millim. millim. millim. 



Length of the test, 18-5 14 9-5 



Breadth of the test 15-5 11-25 8 



Height of the test 9-5 8-5 5-5 



Localities. In the Khirthar series of strata : — 



i. Lowest scarp under Karothur hill, eight miles east-north-east of Jungshahi 



Gr 2R0 



(at the base of the group). Survey -number -y^g-. 



ii. Three or four miles south-south-east of Meting (at base of the scarp). 

 Survey-number -j^ . 



iii. On the road about four miles west of Kotri. Survey-number -j^. 



x2 



