13G RECORDS OF THE AUSTRALIAN MUSEUM. 



these collections, my thanks are due, respectively, to Mr. E. F. 

 Pittman, Prof. T. W. E. David, Prof. W. Baldwin Spencer, Mr. 

 H. Y. L. Brown, Mr. B. Dunstan, Mr. C. J. Wild, and Mr. G. 

 Sweet, all of whom responded in the most cordial manner to my 

 applications. -' 



With the intention of ascertaining all that could be learnt of 

 the Australian type, C. australe, Moore, I enlisted the sympathy 

 and help of my friend, Dr. A. Smith Woodward, who endeavoured 

 to obtain for me a reproduction of Moore's figured specimen, 

 believed to be in the Bath Museum, where the remainder of 

 Moore's collection of Australian Mesozoic fossils is deposited. 

 Most unfortunately, however, this particular fossil appears to be 

 non-extant, either lost or mislaid, and so this avenue of informa- 

 tion is closed to me. 



This investigation has necessitated an entire reconsideration 

 of all the facts hitherto published regarding our Crioceri and 

 Ancyloceri, and the modification of a good deal of pre-existing 

 work, including my own. 



If Crioceras australe, Moore, is to remain on our list, then a 

 goodly proportion of the following results is open to suspicion ; 

 but if it he permissible to absolutely reject this name, on the 

 ground of insufficient description and loss of type, then I believe 

 the suggested determinations following are as near to the truth 

 as the materials now gathered together will permit of. 



II. — As to Crioceras australe, Moore. 



It is not my intention to recognizee, australe as a species, and 

 it is as well, once for all, to give my reasons for so doing. The 

 only characters worthy of note, and they are not of much value, 

 given by Moore are the following: — (1) large size; (2) volutions 

 closely fitting ; (3) earlier cost:e regular, rounded and slightly 

 curved ; (4) later costse widely separated and acute, with two 

 '•depressed bosses on either side" (of the median line of the venter 

 it is presumed .') : (5) younger sulci (intercostal valleys) rounded; 

 (6) older sulci regularly concave; (7) mouth seven and a half inches 

 by seven ; (8) siphuncle small and immediately ventrad; (9) venter 

 broad, three and a half inches. 



Onl}' one of these characters is of sufficient importance to be 

 specific, the occurrence of the two "depressed bosses' on either 



2 The present paper will therefore contain descriptions of fossils from 

 localities other than those comprised within the geographical boundaries 

 given in the title. 



