228 THE FOSSIL ECHINOIDEA 



no traces of such a band are discernible in our specimen. There appear to have been 

 very broad naked areas corresponding to the postero-lateral ambulacral areas on either 

 side of the plastron. 



The ornamentation of the test is all more or less destroyed ; that on the abactinal 

 surface generally appears to have been small and homogeneous in character, whilst that 

 of the actinal area consisted of larger and more isolated tubercles in large scrobicules, 

 with a few minute miliary granules in the interspaces. Within the depressed areas, 

 wherein the petaloid ambulacra are placed, there .are the remains of a few very large 

 primary tubercles, probably three' or four in each, and no other similar ones are 

 present elsewhere on the test. 



' In one of the lateral interradia there is a mark which occupies the probable 

 position of a peripetalous fasciole, but whether such a structure was originally present 

 we are quite unable to determine. 



Memarks. Whilst the Indian form above described agrees in every particular with 

 the generic diagnosis formulated by Cotteau for Brissopatagus, it differs considerably 

 and unmistakably from each of the three species at present included therein. 

 B. Sindensis is readily distinguished from S. Caumonti, Cotteau, by the more elongate 

 and posteriorly tapering test, by the wide and more shallow anterior groove, and by 

 the more elongate petals, as well as by the different ornamentation of the test. From 

 B.javanicus, Cotteau, the shape of the test and the proportions and character of the 

 ambulacra are alone sufficient to separate the Khirthar species. Finally, in B. Beyrichi, 

 Dames, the form of the test and position and relative proportions of the anterior and 

 posterior pairs of petals clearly indicate that the two species are undoubtedly distinct ; 

 although it seems probable that the Veronese form is the nearest ally of our Indian 

 example. Dames defines a well-marked peripetalous fasciole in his form, but in the 

 two species studied by Cotteau there is no indication of the presence of any fascioles; 

 whilst in none of the three species has a subanal fasciole been observed. From the 

 foregoing remarks it will be seen that Brissopatagus Sindensis may or may not have 

 had a peripetalous fasciole, but that there is evidence, which almost amounts to con- 

 firmation, that a subanal fasciole was present. 



Dimensions. Length of the test 39 millim., breadth 31 millim., height 17'5 millim. 



Locality, In the Khirthar series of strata : Baili, west of Tong. Survey-number 



G304 



Illustrations of the Species in Plate XXXVIII. . 



Fig. 19. Abactinal view of the test : natural size. 



20. Actinal view of the test : natural size. 



21. Longitudinal profile of the test : natural size. 



Genus BEEYNIA, Besor, 1847. 



Large Urchins well characterized by the presence of peripetalous, internal, and 

 subanal fascioles. There are large tubercles with deep scrobicules limited by the peri- 

 petalous fasciole, but not in the posterior interambulacrum. The internal fasciole crosses 



