OF KACHH AND KATTYWAB. 79 



De Loriol, with his usual perspicacity and able discrimination, classified an 

 anomalous form from the neighbourhood of Thebes as Euspatangus* - Now his 

 Euspatcmgus Cotteaui has the paired ambulacra lodged in deepish grooves. The petals, 

 however, are those of the genus ; and the peripetalous fasciole does not enter the area 

 between the ambulacra ; moreover the form is depressed. 



We cannot admit the form now under consideration within Euspatangus, and it 

 must be included in a genus of Spatangoids which, with great affinities to Euspatangus, 

 Maretia, and Brissopatagus, is still as distinct as they are. 



This new genus Troschelia contains Spatangoids more or less cordiform, tall and 

 tumid. The anterior ambulacrum is in a groove which notches the ambitus ; the 

 other ambulacra are in deep grooves, the antero-lateral very divergent. Large tubercles 

 in sunken scrobicules on the anterior and lateral interradia only. Peripetalous fasciole 

 separating tubercles and entering the area between the lateral petals. Subanal fasciole 

 large and well developed. 



The Breynia is a fine form ; and the condition of preservation of the specimen 

 allows the internal fasciole to be seen perfectly. It passes much more in front than 

 was drawn by MM. d' Archiac and Haime. Moreover it is clear that the inner pores of 

 the anterior poriferous zone of the antero-lateral ambulacra are distinct but small ; 

 they do not abort as is the case in the recent species. The number of large tubercles 

 in the areas constitutes a remarkable feature. The species is not found in the Num- 

 mulitic as stated by MM. d'Archiac and Haime. 



The only ScMzaster from Kachh which was sent by the Geological Survey is 

 remarkable for its great beauty of ornamentation, the outward turn of the narrow 

 pointed anterior petals, the rather depressed shape, the swollen condition anteriorly, 

 and the narrow pointed hinder end. It came from an unknown locality ; and this is 

 to be regretted, for although the form is clearly of Miocene age in Kattywar, it is 

 found in the Nari series of Sind, part of which at least is Oligocene. 



The Miocene fauna of Echinoidea is especially characterized by the genera 

 Ccelopleurus, Temnechinus, Clypeaster, Echinodiscus, Echinolampas, Breynia, and Moira. 

 There are no species, however, which so closely approach recent forms as to be difficult 

 of discrimination. No less than six species which have hitherto been termed Nummu- 

 litic, and which were described by d'Archiac and Haime, now evidently belong to 

 the Miocene of India and not to a lower horizon. 



This Miocene horizon is not a high one, and is the equivalent of the Gaj deposits 

 of Sind. It is not covered by Pliocene marine deposits ; but there are Pliocene deposits 

 with an Echinoidean fauna which constitute the Makran series of Ras Malan in 

 Baluchistan and of Bushir &c. in the Persian Gulf. The Echinoidea of these Tertiary 

 deposits differ. 



The alliance of the Miocene fauna of Kachh with that of Europe is only generic, 

 but the facies is remarkably persistent in the east and west. 



* Op. cit. p. 140 (84). 



