232 THE FOSSIL ECHINOIDEA 



a subanal fascicle was present or not. The form of the test, however, in that region 

 appears to preclude the supposition of its existence entirely. 



Dimensions. Length of the test 70 millim., breadth 58'5 millim., height 28 millim., 

 breadth of the postero-lateral petal 6"5 millim. 



Localities. In the Khirthar series of strata: — i. Dharan pass, near Laki. Survey- 

 number ™. 



ii. Uncertain (purchased with others), said to be from Jakhmari, or from Teyon, 

 Laki range. Survey-number ^^. 



iii. Uncertain (purchased), said to be near Jakhmari, Laki range. Survey- 

 number «f-^ 



iv. Said to be from near Jhirak (Jerruck) (presented), exact locality unknown. 

 Survey-number ^^. 



Illustrations of the Species in Plate XXXVIII. 



Fig. 1. Abactinal view of the test : natural size. 



2. Longitudinal profile of the test : natural size. 



3. The apicaldisk: magnified. 



4. Portion of the odd anterior ambulacrum : magnified. 



5. Portion of the antero-lateral ambulacrum : magnified. 



2. Macbopneustes eotundus, Duncan & Sladen. Plate XXXVIII, Figs. 6 & 7. 



Test of medium size, depressed. Marginal contour rotundly oval or subcordiform, 

 well rounded and very faintly indented anteriorly, more contracted posteriorly and 

 broadly truncate. The greatest breadth is slightly excentric in front, and is propor- 

 tional to the length as 0'9 : 1. The margins are well rounded and rather tumid. The 

 abactinal surface is regularly convex, and, as far as can be ascertained from the specimen 

 under notice, was probably highest posteriorly. The actinal surface has a slight tumid 

 character in consequence of a little depression round the peristome and the well-rounded 

 margins ; the actinal plastron is also rather tumid. 



The apical disk is excentric in front, its distance from the anterior margin being a, 

 little more than one third the length of the test. All details obscured. The anterior 

 pair of petals are comparatively shorter than in the preceding species, and have a some- 

 what more petaloid appearance in consequence of the greater curvature of the posterior 

 zone as compared with the anterior one. The poriferous zones, which are broad but 

 diminish considerably at either extremity, are placed in shallow grooves of the test ; the 

 inner series of pores are elongately oval transversely, and the outer series slit-like, and 

 united by a conjugating furrow. The interporiferous area is narrower than a poriferous 

 zone, and appears to be slightly raised or tumid in consequence of the depressions in 

 which the poriferous zones are placed ; its ornamentation is obliterated. The anterior 

 pair of petals are very widely divergent, and subtend an angle of about 160°. The odd 



