240 THE FOSSIL ECHINOIDEA 



postero-lateral petals. The structure of the fasciole is exceedingly delicate, and its 

 course is well marked out on either side by series of minute uniform miliary granules. 

 Although nearly the whole of the posterior extremity is destroyed in our specimen, a 

 portion still remains of a very large and broad subanal fasciole. It was probably widely 

 subreniform in shape, and the breadth of the band is much greater than that of the 

 peripetalous one. 



BemarJcs. This species is well distinguished from all its congeners, and cannot be 

 mistaken for any Euspatangus with which we are acquainted. The long, narrow, 

 ambulacral petals and the comparatively prominent and shallow-scrobiculed large 

 primary tubercles are strongly suggestive of features in Macropneustes. The test, 

 however, is very depressed, the primary tubercles are clearly limited by the peripe- 

 talous fasciole, and a wide and well-developed subanal fasciole is present, — characters 

 which in the present state of our knowledge justify us in referring the species to 

 Huspatangus. 



Dimensions. Length of the test 65 millim., breadth 58 millim., height about 

 21'5 millim. 



Locality. In the Khirthar series of strata: Dharan pass (east side), near Laki. 

 Survey-number ^^. 



Illustration of the Species in Plate XXXVIII. 

 Fig. 14. Abactinal view of the test : natural size. 



3. Euspatangus kostratus, d'Archiac. Plate XXXVIII, Figs. 15-18. 



We have already remarked upon the type specimens of this species when describing 

 the fossil Echinoidea of Kachh, and also upon the examples which are found in that 

 collection. 



The following is the diagnosis given by MM. d'Archiac and Haime: — 



Body elongate, suboval ; subbilobed in front, rather attenuated behind, and trun- 

 cated at the extremity; tolerably depressed, rather thickened behind. Ambulacral 

 petals tolerably well closed, rather sharp-pointed, moderately broad, and rather long. 

 Poriferous zones rather narrow, costulate. Anterior ambulacrum only slightly depressed 

 in front, with indistinct pores. The lateral interradia are broader than the anterior, 

 and the posterior is narrow and swollen behind; it is smooth like the ambulacra, but 

 the others are covered with large tubercles unequal in size, and sunken in shallow 

 scrobicules. The peripetalous fasciole appears to be submarginal. 



The periproct is marginal, suboval, and angular above, higher than broad. Inferior 

 aspect nearly plane, but swollen in front of the anus along the median line. 



The peristome is at the anterior two sevenths of the major axis. Good-sized 

 tubercles are on the lateral interradia. 



To this diagnosis we have added (op. cit. p. 48) : — The inner pores of the anterior 

 poriferous zone of the antero-lateral ambulacra abort ; the madreporic body extends far 

 back and separates the posterior ocular pores ; the subanal fasciole is distinct ; the 

 plastron is large and wide; the great tubercles are crenulated slightly. 



