OF WESTERN SIND. 305 



some places this stellate arrangement is seen amongst the granules of the space between 

 the tubercles and the poriferous zones. There is no distinct costulation of or radiating 

 appearance on the poriferous part of the ambulacral plates. 



Dimensions. Height of the test 9 millim., breadth 18-8 millim. 



Locality. The Gaj or Miocene series of Sind: Mazarani Nai. Survey-number 

 G HK 



Illustrations of the Species in Plate XL VII. 

 Fig. 8. The test : natural size. 



9, Part of an ambulacrum and interradium : magnified. 



4. Temnechinus Gajensis, Duncan & Sladen. Plate XLVII, Figs. 10 & 11. 



The test is small, turban-shaped, flat abactinally and actinally, and the peristome 

 is slightly depressed. 



Apical disk wanting. 



Ambulacra narrow, flush, and with slightly sunken poriferous zones with simple 

 pairs of pores. A vertical row of small primaries, with small imperforate mamelons 

 and broad bases, is close to the poriferous zone on either side. The successive 

 tubercles are separated by a transverse row of two or three granules, and are connected 

 with the tubercles of the opposite side of the ambulacrum by lines of granules placed 

 on radiating narrow ridges, with varying amounts of space between them. Hence the 

 surface of the ambulacra is covered with a raised ornamentation of a simple character, 

 and it is connected with that of the interradia by means of costal ridges which cross the 

 poriferous part and are continued on to the interradial area so as to join corresponding 

 processes coming from the bases of the primary tubercles. 



The interradia are broad, and have a somewhat depressed median line. The 

 ornamentation resembles that of the ambulacra ; but the primaries are in two rows 

 only along the line of the centres of the plates, and are connected by long, radiating, 

 granular, narrow, rounded ridges, between which there is, in some places, a little space 

 so as to show parts of the test. Usually the test is well covered by the radiating 

 granular ridges. 



The peristome is small and nearly circular. 



Dimensions. Height of the test 5 millim. ; breadth 9 millim. 



Locality. The Gaj or Miocene series of Sind : Naig Nai valley. Survey-number 



a 302 

 ^ 40 - 



Illustrations of the Species in Plate XLVII. 



Fig. 10. The test : natural size. 



11. An ambulacrum and interradium, in part : magnified. 



Unfortunately there is only one specimen of this species in the collection, but it is 

 very well marked by the peculiar series of small primaries in the interradia and 

 ambulacra, and by their simple radiations of coalescing ridges and granules. There 



2t 



