358 THE FOSSIL ECHINOIDEA 



characterize, in Sind as well as in Kachh and Kattywar, a higher geological horizon 

 than that given to them by our predecessors in the study of the fossils of Western 

 India. 



We have given our reasons for not associating the forms which were described by 

 the great French palaeontologists as members of the genus Temviopleurus with any 

 other group than that of the genus Temnechinus, Forbes. The common fossil Temne- 

 chinus Bousseaui occurs, and we find also our Temnechinus affinis in Sind as well as in 

 Kattywar. But probably the most interesting forms of the genus found in Sind are 

 the two new species T. stellulatus and T. Gajensis, for their alliance with T. lineatus. 

 Dune, of the Australian Tertiaries and with the Australian species of the unfortunately 

 named genus ParadoxecMnus, Laube, is evident. 



The new genus Lepidopleurus is a Temnopleurid with angular and adorally over- 

 lapping coronal plates. We take this opportunity to remark that the new genus has 

 the ambulacral characters of the Triplechinidse as is usually described and that they are 

 totally different from those of the Arbaciadse, 



The Clypeastridse are largely represented, and Clypeaster is a distinctly dominant 

 form in the Gaj series. The species which we have associated with the C. profundus 

 of d'Archiac and Haime is probably the most numerously represented Urchin in the 

 collection. It has been obtained from many different localities and presents a wide 

 range of variability. 



C. pulvinatus in its general habit has much the appearance of a gigantic C. 

 scutiformis, the present inhabitant of tropical seas. C. complanatus, comes nearer 

 perhaps to C. placunarius (Lam.), Agass., than any other form, but is well distinguished. 

 C. pelviformis is remarkable for its deep basin-shaped actinal surface and widely spaced 

 scrobicules. 



The genus Echinolampas, which by its numerous species formed such an important 

 feature in the fauna of the underlying Nari and Khirthar series, is represented in the 

 Gaj series only by E. Jacquemonti and the few doubtful small examples which we have 

 referred to U. spheroidalis. It is true that E. Jacquemonti occurs in large numbers 

 and from many different localities, to such extent as to constitute a characteristic form 

 of the series ; still when compared with the varied species in the lower strata, it is 

 undeniable that the genus was already on the wane. E. Jacquemonti is nearly allied to 

 E. indica from the Miocene of Kachh ; and its afl&nities are also close to the species at 

 present existing in the Indian Ocean. 



The genus Schizaster is represented by two species : — S. Granti, which is a 

 characteristic form in the Nari deposits and in Kattywar, is numerous ; S. sufflatus, 

 an allied but distinct form, is only represented by a single badly preserved e-vample. 



