AUSTRALIAN CAINOZOIC (TERTIARY) DEPOSITS. 67 



but the recent species mentioned above are good forms, and are 

 linked on to those of the Cretaceous rocks and Oolites by the Aus- 

 tralian and New-Zealand species. It is this species, taken with the 

 Holaster and Micraster of the fauna and the Dysasteroid arrange- 

 ment in Rhynchopygus, that gives the Cretaceous facies to part of 

 the Echinodermal fauna of the Australian Cainozoic strata. 



Pygorhynchus Vassali, Wright. 



This species is figured by Dr. Wright in his essay on the Maltese 

 Echinoderms (Quart. Journ. Geol. Soc. vol. xx. pi. xxii. fig. 6) ; and 

 the Australian form cannot be distinguished from it. The periproct 

 is longitudinal in the specimens from both localities ; and there is 

 no floscelle. The genus is essentially Tertiary ; but Forbes described 

 one which is probably a Cassidulus from the Indian Cretaceous beds. 

 Its species are numerous, and have been found in the Eocene of 

 France and Biarritz, in the Miocene of Corsica and Malta, in the 

 Eocene of Georgia, and in the Miocene of Jamaica. It is not repre- 

 sented in the Recent faunas. 



Catopygus elegans, Laube (op. cit. p. 190). 



This species has a concave actinal surface and a kind of plastron 

 on the same surface posteriorly. These are unusual ; and the shape 

 is like that of PygorhyncJius. The figure given by Laube resembles 

 a Catopygus. This genus, so Cretaceous in Europe, thus appears to 

 have lived in the Australian seas during the Miocene age and to 

 have become extinct, unless it merged into PygorhyncJius, its near 

 ally in structure. Its nearest ally in point of resemblance and 

 locality is Catopygus sulcatellus, Stoliczka (Cret. Echin. of Southern 

 India, p. 26). 



Holaster Australia, nobis. 



This most interesting form has of course the Dysasterian genital 

 arrangement ; and the pairs of pores are rather remote. The anterior 

 furrow is very slightly marked at the ambitus, and is lost inferiorly. 

 The test is rather pointed posteriorly. Hence the species is, as it 

 were, between Holaster caudatus and //. indicus — the former from the 

 Lower Cretaceous of the Caucasus, and the latter from the Upper or 

 Middle Cretaceous of Southern India. The genus has not previously 

 been found in Tertiary deposits. 



Maretia anomala, nobis, is a very fine form of this Spatangoid 

 genus, and is in every respect but one like Maretia planidata, Gray, 

 of the China seas, West-Indian Islands, and Mauritius ; it has, in 

 addition to the usual shape and ornamental characters, an extremely 

 delicate and threadlike fasciole just above the ambitus. It is ap- 

 parently not continuous, and is a lateral one. So small is it that I 

 doubt the propriety of placing the form so closely resembling Maretia 

 in all other peculiarities in another genus. The genus is essentialy 

 a Eecent one, and is closely allied to the Tertiary Spatangoids. 



EuPATAGUS ROTUNDTJS, nobis. 



The genus Eupatagus has four well-marked distinct species in 



f2 



