318 THE FOSSIL ECHINOIDEA 



tubercle, on the plates at the ambitus, there are two other primary tubercles, that 

 next to the large one first noticed being slightly smaller, and the one nearest the inner 

 end of the plate still smaller. Th.e small inner tubercle is not found on more than 

 ■five or six plates above the ambitus, and the one next to the large tubercle does not 

 extend to the apex, but is reduced to little more than a granule when it reaches the 

 upper part of the area. On the outer side of the large primary tubercle are two 

 moderate-sized secondary tubercles, placed vertically in relation to one another ; and 

 the series formed by these extend nearly to the apex. On the plates immediately at 

 the ambitus there are frequently two similar, vertically placed, but smaller, tubercles, 

 standing between the first-mentioned pair and the poriferous zone, and close to the 

 latter ; sometimes, however, there is only one. These small secondaries do not extend 

 much above the ambitus, though a small granule, usually standing opposite the end of 

 the adoral primary plate of an ambulacral plate, is so placed that it might be ranked 

 in this series ; but this is by no means regular in its occurrence, and does not extend 

 much further than midway between the ambitus and the apex. A line of small 

 mammillated granules, rather widely spaced, stands close to the aboral margin of the 

 plate, indeed so close that frequently a part of the boss appears to be cut away, and a 

 somewhat crenulate character is thus imparted to the margin of the plate. A few very 

 minute miliary granules surround the scrobicule of the large primary tubercle, and a 

 granule of irregular occurrence may stand opposite the interspaces between tubercles, 

 near the adoral margin of the plate. 



Apical disk and peristome unknown. 



Bemarks. At first sight this species suggests an affinity to the form we have 

 named Grammechinus regularis from the Miocene of Kattywarf , on account of the line 

 of granules abutting on the aboral suture of the interradial plates, and appearing as if 

 partially cut away. On closer observation, however, the tuberculation and the 

 character of the two forms are generically different, and we see no reason for removing 

 the species under notice from the genus Echinus. 



Dimensions. The greatest diameter of our type specimen is 35 millim., but is some- 

 what affected by crushing ; from the same cause it is impossible to give the true height 

 of the test: in its present condition it measures about 17 millim. 



Localities. In the Gdj series of strata :— 



i. North of Babba band, five miles east of Kadeji. Survey-number G ^^. 



ii. Scarp of the Mol Plateau, west of Kund (the same scarp as G \^). Survey- 

 number G -f^. 



The specimen from the latter locality is a fragment in a very bad state of preser- 

 vation and scarcely determinable ; it is therefore referred to the species with doubt. 



Illustrations of the Species in Plate XLIX. 

 Fig. 5. Abactinal view of the test : natural size. 



6. Ambulacral and interambulacral plates a little above the ambitus : mag- 

 nified. 



t Tert. Fobs. Echiu, Kachb and Kattywar, p. 82, pi. xiii. figs. 7 & 8. 



