306 ^Ir. J. Smith on the Upper Silurian 



a, view of aperture ; &, c, unflersides. Some of the shapes 

 are identical to those assumed hy the little freshwater Rliizo- 



pod of our ponds and ditclies called Difjlagia. 



Loc. Lau Canal, Sluguklint, lvor|iklint, Stora Carl 



so. 



Lagena Icevis, Montag., sp. 



'J'lie two fijxures give the extreme variation in shape seen. 

 hoc. Lau Canal and Sluguklint. 



Lagena clavata^ D'Orb., sp. 



The two figures show the extreme oi variation. 

 Loc. Sluguklint. 



Lagena graciUima, Seg., sp. 



The two figures show considerable diflferences in shape, but 

 not any more so than recent forms. 

 Loc. Wisby Cement Works. 



Lagena parkeriana, Brady. 



The seven figures I give of this species will show how it 

 varies in shape and size. 



Loc. Stora Carlso, Lau Canal, Eofvar Liljas hiilo, and 

 Sluguklint. Common in the Carboniferous limestones of 

 Scotland. 



Lagena auriculata, var. Unearituha, Ciishman. 



I had regarded this form as a FusuUna, but Mr. Wriglit 

 has no doubt of its being a Lagena. 

 Loc. Wisby Cement Works. 



Lagena cylindrical sp. n. 



This species is all but cyliudricalj with the neck of the 

 tube sometimes slightly bent. 



Loc. Stora Carlso and Wisby Cement Works. 



Lagena gottlandica, sp. n. 



Globular, with a short tube. 



This form differs from all recorded species of Foraminifera 

 in having minute concentric stria?, resolvable by high powers 

 into beaded lines running round the test. As wasted speci- 

 mens it is not infrequent, but when perfect it is a bright 

 glittering little form. 



Loc. Stora Carlso. 



