part 3] JURASSIC HOCKS OF NEW ZEALAND. 265 



collected by the Novara Expedition which are preserved in the 

 Vienna Museum, and gives a description and enumeration of them. 1 

 He also had five specimens from Kohai Point and four specimens 

 from a place near Totara Point called Captain King, which were 

 collected for him by Mr. H. Suter in 1905. 



Zittel's description of A. plicata lays emphasis on the concen- 

 tric, rather widely-spaced folds which are said to be stronger than 

 in any known form. The radial sculpture is not mentioned, but 

 Bcehni, as a result of his examination of the Novara material, sa}'s 

 that it is apparent on two of the original specimens. 



Bcehm refers his specimens from Kawhia to Zittel's species 

 A. plicata. Those that I collected at Kohai Point, Kawhia, are 

 quite distinct from the forms that were collected at Waikato, 

 all of which resemble very closely the AuceUce of the group of 

 A. spitiensis and have no radial ornamentation. 



I did not visit Waikato, and so I cannot say from personal obser- 

 vation whether the small arched form which occurs at Kawhia 

 with Inoceramus haasti occurs there also, but Prof. Marshall 

 informs me in a letter that he did not find it there. The N.Z. 

 Geological Survey report on the district states, however, that 

 I. haasti is found at Waikato, and so it is possible that both 

 forms of AuceUce occur there, that related to A. spitiensis 

 representing possibly a higher horizon than the other species. 



It seems not improbable that some of the Novara specimens 

 from Waikato may have become mixed up with those from 

 Kawhia. Hoehstetter collected Inoceramus haasti at Kawhia, 

 and could scarcely have failed to collect the AuceUce that occur 

 in the same bed with it. 



However, in order to avoid any further confusion on this point, 

 I shall describe as best I can the material in my hands, indicating 

 the localities whence it came, leaving the further problems to be 

 solved by future search in New Zealand. 



It seems uncertain whether the AuceUce from the Inoceramits- 

 haasti Beds really belong to the form from Waikato, which Zittel 

 calls A. plicata ; but, as Boehm unites them under that name, I 

 follow his example with regard to the specimens that I collected. 



Dr. K. Holdhaus 3 remarks that he has seen the types of 

 Aucella plicata, and is assured that they represent a true Aucella 

 very closely allied to A. pallasi Kej^serling and A. blanfordiana 

 Stoliczka. 



Prof. E. Haug says that Piroutet cites the occurrence in New 

 Caledonia of an Aucella related to A. leguminosa of the Spiti 

 Beds. 



Unfortunately, the AuceUce yield little information regarding 

 the horizon of the beds in which they occur. Those known from 

 the Southern Hemisphere bear so little resemblance to those 

 from the Northern, excluding India, that correlation is almost 



1 Neues Jahrb. vol. i (1911) p. 11. 



2 ' Fauna of the Spiti Shales, &c.' op. cit. p. 405. 



u2 



