OF KACHH AND KATTYWAR. 37 



perforate. This ornamentation diminishes in size posteriorly. In front of the peri- 

 stome, on either side of the anterior groove, the ornamentation is very scanty, and 

 consists of more or less distant low tubercles with circular scrobicules, the edges of 

 which are raised like flat rings. The bosses are low and crenulated, and the very 

 small mamelons are perforated. Above the margin in this part of the test the orna- 

 mentation becomes smaller and closer, and near the keels smaller still. 



On the flanks the ornamentation is of the distant kind and is large, and higher up 

 it becomes smaller and closer, but the same character is noticed. The keels of the 

 lateral interradia have a few medium-sized tubercles on them near the apex. 



The posterior truncation is large and slopes downwards and slightly backwards ; 

 and there is some tumidity above the posterior end of the actinal surface. 



The fascicle is peripetalous, and is large and well developed where it clings to the 

 ambulacra, closing their ends and reaching far towards the apex ; but it becomes 

 smaller as it passes forwards from the antero-lateral petals to curve over the anterior 

 ambulacrum, and also where it passes directly over the posterior keel. There is no 

 offshoot to pass beneath the anus, and no lateral fascicle. 



The appearance of the test from above is remarkable on account of the great arch 

 of the anterior keels and their sloping precipitously backwards ; and it is to be remarked 

 that this view indicates that the posterior part of the test is the broadest. But seen 

 from below, the oval outline is evident and the narrowing behind also. 



Length of the test 40 millim., breadth 33 millim., height 32 millim. 



Locality. Nummulitic group of Kachh. Between Maniara-Fort hill and Karray, 

 about three miles east of Bair. Survey-numbers C 050, C 050 f c. 



Illustrations of the Species in Plate XI. 



Fig. 1. The test from the side : natural size. 



2. The test, abactinal view : natural size. 



3. Actinal view of the test : natural size. 



4. One of the tubercles on the actinal surface : magnified. 



Genus SCHIZ ASTER, Agassiz, 1836. 



On investigating the types of ScMzaster B^loutchistanensis, d'Archiac, from the 

 NumnluLitic of Sind in the museum of the Geological Society, it was found that their 

 condition of preservation did not enable us to discover the position of the fasciole in 

 front of the antero-lateral ambulacra, that the branch from the peripetalous fasciole to 

 beneath the anus is very faintly seen, and the ornamentation is worn. Two types are 

 labelled ; and it is clear that the species varies in the breadth of the test and in the 

 height of the keel on the posterior interambulacrum. 



Several Schizasters in the collection of the Geological Survey of India from Kachh 

 must be regarded as varieties of the ScMzaster named after Baluchistan by MM. 

 d'Archiac and Haime. The main difference, and in fact the only one, is that the 



