Chapman. — On some Foraminifera and Ostracoda. 77 



Art. XVII. — On some Foraminifera and Ostracoda obtained 

 off Great Barrier Island, Neiv Zealand. 



By Frederick Chapman, A.L.S., F.R.M.S., Palaeontologist, 



National Museum, Melbourne. 



[Read before the Wellington Philosophical Society, 2nd August, 1905.] 



Plate III. 



Introductory Remarks. 



The following series of Foraminifera and Ostracoda was 

 obtained from material collected during the dredging opera- 

 tions carried out by Messrs. Hedley and Suter, under the 

 auspices of the Australasian Association for the Advancement 

 of Science, at the Dunedin meeting in 1904. 



The sounding from which the microzoa were selected was 

 taken in lat. 36° 8' S., long. 175° 55' E., off Great Barrier 

 Island, North Island New Zealand, at a depth of 110 fathoms. 

 This locality is not far from the "Challenger" station 169, 

 where at a depth of 100 fathoms the water had a temperature 

 of 55-2°.* At this station, at a depth of 700 fathoms, sixty- 

 six species of Foraminifera, but no Ostracoda, were recorded. 

 Of the Foraminifera, twenty-eight species are common to both 

 localities, after making allowance for changes in some of the 

 specific names of the earlier record. The Ostracoda are dealt 

 with in detail in the sequel to this paper. 



The sounding off Great Barrier Island is remarkable for 

 the extraordinary abundance of specimens of Biloculina, Nodo- 

 saria, Gristellaria, and Truncatulina, and their full develop- 

 ment is indicative of especially favourable conditions of life in 

 that particular area. 



Another interesting feature of the present assemblage of 

 Foraminifera is the presence of a large number of forms which 

 have hitherto been found in dredgings from other, widely 

 removed, areas, generally in the Northern Hemisphere ; and 

 particularly from the colder waters of the Temperate Zone. 



The following is a list of the Foraminifera embodied in this 

 report ; the species new to the New Zealand area, according 

 to the list given in Captain Hutton's " Index Faunae Novae- 

 Zealandiae," being marked with an asterisk. Of the 103 

 species of Foraminifera enumerated, fifty-seven are new to this 

 area, whilst one is new to science, and constitutes the type of 

 a new genus. 



* Biloculina pisum, Schlumberger. 

 *B. anomala, Schlum. 



* Chall. Reports, Summary of Results, pt. i, 1895, p. 605. 



