OF KACHH AND KATTYWAR. 81 



on the outer half, so that there is more space towards the median line beyond it than 

 near the poriferous zone. The boss slopes upwards with a slightly re-entering outline 

 from the base to the broad top. This is grooved around the neck of the rather small 

 depressed mamelon, and is faintly crenulated oil one side in most instances. The ma- 

 melon is perforated. At the edge of the scrobicular circle are some radiating depressions, 

 shallow and broad, and they end in a radial row of about three granules, which are 

 between the principal secondaries of the circle. These secondaries are small, rather wide 

 apartjlargest on the equatorial parts of the plate, and smallest abactinally and actinally ; 

 they have a mamelon, which is elongate, its long axis being towards the boss. 



Actinally and abactinally each plate has a single row of these secondaries, separated 

 by the intervening rows of granules. 



Towards the media,n line there is a row of smaller tubercles alternating with the 

 larger, and still further there are two other rows of smaller and distant tubercles, the 

 last being almoet miliary in size. Between the scrobicular circle of tubercles and the 

 poriferous zone there is one row of smaller secondaries and some granules. 



Locality. Kattywar Miocene. Three miles east by north of Gaga, and south-east 



XT 1 



of Gurgat. Survey-number -^, 



Illustrations of the Species in Plate XIII. 



Fig. 4. The test : natural size. 



5. The ambulacrum, in part: magnified. 



6. A coronal interradial plate : magnified. 



Family ARBACIAByE. 

 Genus CCELOPLEUEUS, Agassiz, 1840. 



1. CcELOPLEUEUS FoEBESi, d'ArcMac & Haime. 



This species has been already noticed in the description of the Miocene Echinoidea 

 of Kachh, page 53. 



Family GLYPHOSTOMATA. 



A very remarkable form occurs in the Miocene of Kattywar ; although its 

 shape and structural details are exceedingly suggestive of several well-known genera, 

 it cannot enter any one of thdm. At first sight the resemblance of the Kattywar 

 specimen to the actinal surface of Micropsis Fraasii, de Loriol (' Echinides contenus 

 dans les couches Nummulitiques de I'Egypte,' plate 1, fig. 17), is extraordinary ; but 

 in the later form from Kattywar the tubercles are neither crenulated nor perforate, and 

 the pores are decidedly in triplets. It reminds the observer of the genus Polycyphus ; 

 but the multiplication of the pores around the peristome seen in this genus does not 

 exist in the new form, whose peristomial lips are not very narrow. There is a resemblance 

 to species of Stomechinus, especially in some points to Stomechinus Greslyi and S. Miche- 



M 



