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LAGENAE OF THE SOUTH-WEST PACIFIC OCEAN.. 



(SUPPLEMENTARY PAPER.) 

 By Henry Sidebottom. 



{Read June 24/7/, 1913.) 

 Plates 15-18. 



INTRODUCTION. 



The Lagenae dealt with in this supplementary paper were- 

 arranged by the late Mr. Thornhill on nine slides, each of which 

 is divided into one hundred squares. Nearly every square is 

 occupied, with the exception of some on the last slide. The 

 number of specimens exceeds twelve thousand. In the material 

 for mv first paper the number of specimens of Lagenae exceeded 

 six thousand, thus making a grand total of over eighteen thousand. 

 For reasons stated in my former Introduction, it has not always 

 been possible to give the locality at which specimens were found. 



The series dealt with now is on three sets of slides, Nos. 1-4 A 

 being Penguin gatherings, Nos. 1-3 b Penguin and Dart gatherings 

 combined and Nos. 1,2 c those on which Mr. Thornhill had just 

 begun to bring together specimens arranged according to a system 

 he had hoped to carry out. 



The specimens of Lagenae on the three sets of slides were not 

 arranged in sequence with each other, so that the work has 

 proved more laborious than that of my first report. 



The division of the keel, which occurs in a good many tests 

 and in more than one species, adds to the difficulty of identifica- 

 tion, and it is easy to be misled by it. The same may be said 

 of some of the markings on the faces of the test, which have 

 hitherto been considered as specific characters. 



Again I must acknowledge the kindness of Mr. Millett, whose 

 advice I have always found most valuable and freely given. My 

 thanks are due to Mr. Wright, of Belfast, to Prof. Hickson, 

 of the University of Manchester, for kind assistance, and also 

 to Mr. Earland for bringing these papers before the Quekett 

 Microscopical Club and examining specimens for me in order to- 



