OF KACHH AND KATTYWAR. 59 



ferous areas are much wider than the poriferous zones. The odd ambulacrum is the nar- 

 rowest, and is longer than the antero-lateral, and equal to the posterior pair in length : 

 its poriferous zones become narrow distally and show no tendency to close ; whilst the 

 interporiferous area is nearly three times as broad as a poriferous zone. The poriferous 

 zones of the lateral ambulacra diminish in breadth distally, are widely open there, and 

 the last three pairs turn slightly away from the direction of the median line of the 

 broad interporiferous area. The very broad and long posterior ambulacra are also 

 open. The ornamentation of the interradia is close and small, and that of the 

 ambulacra closely resembles it. The costse carry a row of tubercles of the same dimen- 

 sions as those beyond. 



Length 67 millim., breadth 55. Length of odd petal and of postero-lateral 

 20 millim., of antero-lateral 17 millim. Breadth of odd ambulacrum 10 millim., of 

 antero-lateral 11, and of posterior 11'5. 



Locality. Kachh. Miocene series ; about a mile east of Goir. Survey-number 

 C043 Af. 



Illustration of the Species in Plate XII. 

 Fig. 13. Abactinal view of the test : natural size. 



3. Clypeaster Goieensis. Plate XII, Figs. 14 & 16. 



The test is depressed, longer than broad, very slightly elevated at the rosette, 

 irregularly pentagonal in outline, broadest on a line with the antero-lateral ambulacra, 

 narrowest in front of that line. The posterior angles are truncated, and there is a 

 slight reentering curve at the sides and posteriorly. The petals are tumid, long, broad, 

 widely open ; the poriferous zones are broad, become narrow suddenly distally, and 

 the terminal pairs are directed outwards ; and the interporiferous areas are more than 

 twice as broad as a poriferous zone. 



The odd ambulacrum is of the same length as the posterior, but is the narrowest 

 of all in its area and zone. The antero-lateral ambulacra are the shortest, are broader 

 than the odd one, and are very nearly as broad as the postero-lateral ; these last are 

 as long as the odd one, and are the broadest of all. The ornamentation is small and 

 crowded, and the costse carry tubercles in a single row, which are of the same size as 

 those in the interradia and interporiferous areas close by. Near the margin the orna- 

 mentation is coarser. 



Length 74 millim., breadth 65. Length of odd and posterior ambulacra 20 millim., 

 of antero-lateral 17-5 millim. Breadth of odd petal 12 millim., of antero-lateral 13, 

 and of postero-lateral 13'7. 



Locality. Kachh. Miocene series; about a mile east of Goir. Survey- 

 number C 043 A f. 



Illustrations of the Species in Plate XII. 



Fig. 14. The test from above : natural size. 



16. The terminal pores of a poriferous zone : magnified. 



1 2 



