16 SlDEBOTTOM, Foraminifera from the Island of Delos. 



The Delos specimens seem to be intermediate, and to 

 lie between P. spinosa, d'Orbigny and P. hirsuta, Brady, 

 Parker and Jones ('70), p. 243, pi. 42, fig. 37. The shape 

 of the test is not so globular as in the type, and the seg- 

 ments are more inflated. The tests are often adherent, 

 and in this state they are frequently fixed in an angle, or 

 cavity, of a broken shell by means of the spines, which are 

 short or long as necessity requires. About twenty-five 

 have been found. Rare. 



Polymorphina ? complexa, n. sp. (PI. 4, figs. 1-9 and 

 Text-figs. 3-7.) 



Polymorphina ? complexa, n. sp. x 50. 



I am much puzzled as regards the genus of this species. 

 The specimens vary in size, and in the disposition of the 

 segments, as reference to the figures will show. A good 

 many could be arranged round forms like figs. 1-4, of the 

 rest hardly two are alike. All have the mouth cribrate. 

 as far as I can make out. They at once arrest attention 

 by their colour, which is of a very delicate pale ivory, and 

 they are generally semi-transparent. Some would pass 

 for Bulimina if the aperture were typical, but taken as a 

 whole (and there are about one hundred and twenty-five 



