IX 
UTHORS 
f 
RE FACE. 
The present Part comprises the first instaJment of tlie Second Voliune of the 
“ Monograpli of the Carhoniferoiis and Perino-CaiPoniferous Invcrtehrata of 
New South Wales.” 
Parts I and II, wliich have already been pnhlishcd, deal with the true 
Corals, Montienliporoidea, Echiuodermata, Annelida, and Crustacea of the 
Carboniferous and Permo-Carboniferous of the Slate. These Parts, with two 
further sections dealing with tlic Polyzoa and Brachiopoda respectively, will 
complete Vol. I of the Monograph. 
Vol. II will deal ^vith the Pelecypoda as a whole, and will be devoted 
to those from the Carboniferous and the marine sediments nsually known as 
the U^pper and Lower Marine Series of the Permo-Carboniferous System. 
It having been found impossible to treat the sul)ject as a whole in a 
strictly genetic setpience, it is j^roposed, as in the case of the Monograph 
of the Silurian and Devonian Corals now in course of publication, to issue 
small Parts, each of which will comprise all the information availaldc on a 
certain well-marked generic type and closely allied genera. 
AVith this end in view the first group of fossils to be described is that 
of the Pectinoid shells, comprising the characteristic Australian genera 
Dellopecten, Aviculopecten, and Eutolin'u. 
The forms dealt with are from the collections of the Geological Survey 
of New South Mmlcs, the Australian Aluseum, the University of Sydney, and 
the Technical College. 
The illustrations were prepared in the most part from carefully 
executed photographs by Air, A. Ik Dyer, in charge of the Photographic 
Branch, Government Printing Office, and plates XIII-XV were drawn l)y 
Mr. E. B. Leggatt, and the whole reproduced under the direction of 
Air. AV. Gullick, Government Printer. 
Sydney, 
-Tunc, 190G. 
B. ETHEBIDGE, June. 
AW S. DUN, 
E 
