375 



LAGENAE OF THE SOUTH-WEST PACIFIC OCEAN. 



FROM SOUNDINGS TAKEN BY H.M.8. WATER WITCH, 1895. 



By Hexry Sidebottom. 



{Bead March 2Uh, 1912.) 



Plates 1421. 



INTRODUCTIOK 



After the lamented death of my friend Mr. W. Bhindell 

 Thornhill, of Castle Cosey, Castle Bellingham, Ireland, his 

 magnificent collection of Lagenae was presented to me by his 

 widow, the understanding being that I should write an account 

 of it. 



This paper is the first instalment and deals with one set of 

 gatherings only. The specimens are arranged on slides, each of 

 which is divided into one hundred squares. Each set of gatherings 

 has its own chart, showing the stations where the different forms 

 were obtained, but it is not possible in the majority of cases to 

 tell at which station each individual specimen was found, for they 

 were not arranged with that object. Of course, where there is 

 only a single example on a square, or when a form occurs at a 

 single station only, there is no difficulty. This particular set 

 occupies about 380 squares on the slides, each square representing 

 a different species, or variety. 



It would have been a delightful task to figure a greater 

 number of the variations, if only with the object of showing 

 how many of the so-called species run into each other ; but this 

 was impossible considering the amount of work that lay before 



