ECHINOIDEA. 11 



rings, of which stronger and finer ones irregularly alternate. In the centte there 

 is a slightly raised knob, from which fine lines radiate towards the periphei'y. 

 The upper surface is very slightly convex, nearly flat, with a shallow oval depres- 

 sion in the o^ti'e* The septa are numerous, all very elose^ thin, straight dnd 

 subequal, their edges being gUaaulated, 



Locality and stratigrapMcal position— ^D6b T&iQUf^s upper cretaceous. 



Bemarks. — The diameter of this pretty little sp6de& is scarcely more than 25 

 mm., while its height never exceeds 4 mm. By its flat, dept^sed Uppet ade^ and 

 the base marked by radiating strise, this species is easily distinguished from 

 CycloUtes regularis. 



Ctclolites bbgularis, Leymerie. PI. I, fig. 13-136, 14-14a. 



1851. CycloUtes semiglohosa, Leymerie, Mem. de Soc. Geol. de France, seij ii, IV, 199, pi. B, fig. 14. 

 1881. CycloUtes regularis, Leymerie, Mem. G^ol. et Pal. des Pyrenees, p. t74. 



The corallum is circular in shape ; the upper surface nearly hemispherical, 

 slightly depressed in the centre. The fossula is longitudinal, slit like, and very nar- 

 row. The septa are very numerous, thin, unequal and straight, their upper edges 

 being probably granulated. The lower surface is flat, sometimes even concave^ 

 covered with a moderately thick, concentrically folded epitheca ; in the centre is a 

 more or less distinctly marked small circular knob. 



Locality and stratigrapMcal position. — Sonari Valley, Mazdr Drik. 



Bemarks. — This species is easily distinguished from the former by its hemi- 

 spherical upper surface, and the absence of radiating strise on the lower surface. 



Although I am not quite certain whether the edges of the septa are granulated 

 as in the original of CycloUtes regularis, Ley., I think that, to judge from the general 

 shape, and particularly from the tumid upper surface, and the narrow slit-like 

 fossula, the Baluchistdn form must be identical with that from the Pyrenees. 



III. ECHINODEEMATA. 



Class: ECHINOIDEA. 

 Subclass: EUECHINOIDEA. 

 Order : REGTJLARES. 

 Family : CWdRIDM 



Genus : CIDARIS, Klein. 



CiDARIS SULEIMANI, speC. nOV. PI. II, fig. l-lo. 



Test circular, inflated, apparently equally depressed at both poles, ambulacral 

 areasnarrowandflexuous, slightly depressed; filled in the middle with two rows 



c 2 



