OF WESTERN SIND. 



Genus METALIA, Gray. 

 1. Metalta Soweebti, d'Archiac, sp, 



Brissopsis Sowerbyi, d'Archiac (1850), Hist, des progres de la Oeol. t. iii. p. 251. 



Brissopsis (?) Sowerbyi, d'Archiac Sf Haime (1853), Anim.foss. de I'Inde, p. 220, pi. xv. fig. 7 a, b. 



A single example of this form, in very bad preservation, occurs amongst the 

 Ranikot Echinoidea. The condition of the specimen is most unsatisfactory, all 

 structure and detail having been destroyed by weathering; and we are only able 

 to determine the species by comparison with a large series of perfectly preserved 

 specimens from the Khirthar strata, which are identical with MM. d'Archiac and 

 Haime' s badly-preserved type specimen in the collection of the Geological Society of 

 London. Further remarks on this species are deferred until the description of the 

 Khirthar series; but we may, however, mention in conclusion that MM. Desor, 

 de Loriol, and other writers have been misled, by the incorrect drawing of the form in 

 the ' Animaux fossiles de I'Inde,' in placing the species under Prenaster. 



Locality. North by east of Petiani, west of Kotri, Ranikot series. Survey- 

 number G f 1^. 



IV. Bemarks on the Genera and Species in the BaniJcot Series. 



There are 41 species and 1 variety in this fauna. The species Ehynchopygus 

 Caldeyi, d'Archiac, sp., mentioned also, was probably placed accidentally in this series 

 by the collectors. 



The number of species of regular Echini in the series, admitting the distinctness 

 of those forms which, although they can be differentiated from their congeners, are not 

 sufficiently well preserved to be defined specifically, is considerable. There are 17 

 species and one variety. There are two species of true Cidaris and three of Phylla- 

 canthus {Bhabdocidaris). Moreover an examination of the spines found in the beds 

 indicates the former presence of Porocidaris. The species of Cidaris from below the 

 Trap is not represented in the Ranikot beds ; and none of the Cidaridae of these 

 deposits pass upwards into the Khirthar series. 



One species of the genus Salenia^ characterized, however, by the presence of an 

 optic plate within the anal ring (almost an exceptional condition in the fossil species) is 

 represented by several specimens*. It has also a peculiarity about the ambulacral 

 pores. The genus is not represented in the other Nummulitic strata of India. 



The Cyphosoma, a common form, has the peculiarity of having the tubercles of the 

 interradial areas larger than those of the ambulacra. But this is the only exception to 



* See optic plates in two species figured by Cotteau, Peron, and Gauthier, Ech. Toss. Alger, fasc. 5. 







