64 THE TEKTIAEY FOSSIL ECHINOIDEA 



3. EcHiNOLAMPAS SPH.EEOIDALIS, d'ArcMac. Plate XII, Fig. 6, 



Several much-fractured specimens of this species are amongst the collection from 

 the Miocene series of Kachh. They agree with the description given in ' Les 

 Animaux fossiles de I'lnde,' p. 210, and plate xiv, figs. 6 a, I. 



We figure the abactinal surface of a specimen from " Stream-course near Pipur, 

 bordering the tidal fiats." Survey-number C 044 f. 



Illustration of the Species in Plate XII. 

 Fig. 6. The abactinal surface : natural size. 

 It is interesting to find that this and the next so-called Nummulitic species belong 

 to the Miocene fauna. 



4. EcHiNOLAMPAS Jacquemonti, d'ArcMac. 



Some indifi'erent specimens are in the Miocene series. 



Family SPATANQIB^. 



Subfamily 8PATANGINJE. 



Genus MOIEA, A. Agassiz, 1872. 

 Moera, Michelin, 1855. 



Desor, in his ' Synopsis des Echinides,' gives the following definition of the genus 

 (page 394) :— 



Urchins of moderate height, tumid, ovoid, well characterized by their very narrow- 

 ambulacra, which resemble fine deep slits starting from the summit, and being closely 

 surrounded by a peripetalous fasciole in the form of a smooth band. A lateral fasciole 

 exists as in Schizaster. There are two generative pores. 



The fossil species, Moira lachesis, Girard, is found in Postpliocene deposits in 

 South Carolina. It is, however, a variety of Moira atropos, A. Agass\z,= Spatangus 

 atropos, Lamk., a recent form, found down to 80 fathoms from the shore, West Indies 

 to North Carolina, and this is probably its northern limit. 



A recent species, found on the Californian coast, h Moira clotho, Mich. Alex. 

 Agassiz notices that it is most closely allied to Moira atropos, and indeed the distinc- 

 tion is hardly specific. But this species is of importance because another recent 

 one, Moira stygia, Liitk., is well differentiated, and inhabits the Red Sea and Zanzibar 

 coast. It is possible to compare a fossil form from the Miocene of Kachh, which is 

 found in considerable numbers at Wamuti, with these recent forms. The result 

 is very interesting, for it is clear that the species about to be noticed has some of the 

 characters of Moira stygia and some of those of Moira atropos and its variety. 



1. Moira antiqua, Duncan 8f Sladen. Plate VIII, Figs. 1-6. 



The test is high, slopes sharply from the raised keel in the odd interambulacrum 



