Miss E. D. Currie—Fossils from Western Persia. 533 
2). EHpiaster Smellia n. sp. 
Diagnosis.—Shape of test varies greatly. It may be tumid to 
flat, and the length may be equal to, or greater than, the breadth. 
Figs. 1-4 represent four typical specimens. 
Peristome is very near the anterior border. It is almost round, 
and has a small crenulated lip. 
Pertiproct—The posterior border is truncated obliquely down- 
wards and inwards forming a distinct area outlined by a ring of 
nodules. The periproct is circular and is situated in the upper 
portion of this area. 
Apical disc.—Almost central ; slightly posterior. 
Ambulacral areas——There is no anterior groove; the unpaired 
ambulacral area is marked by a line of tubercles along each edge. 
The intermediate space is covered by fine granules with a few 
smaller tubercles interspersed. The pores, only visible in worn 
specimens, are small and round and disposed in oblique pairs at 
comparatively great distances apart. 
Fic. 5.—Part of one of the paired ambulacral areas of H. Smell. x 6. 
The paired ambulacral areas (Fig. 5) are sub-petaloid and level with 
the test, the anterior pair being more divergent than the posterior 
pair. The plates are small and their length is three to four times 
their height. Each contains a pair of conjugate pores, set obliquely 
and both elongated, the exterior more so than the interior one. 
The pore-pairs are separated by a ridge bearing six to eight small 
granules along the upper edge of each plate. The number of pore- 
pairs in the anterior ambulacral pair is usually greater than that 
