Sarjeant, W.A.S. <br/><br/>
New hystrichospheres from the upper jurassic of Dorset 

 - 137-144p.  Illustration 
<br/><br/> Summary<br/>From assemblages of Upper Jurassic organic-shelled microplankton from Dorset are described five new species of hystrichospheres. Of these, two are attributed to a new genus, Polystephanosphaera; one new species of the genus Hystrichosphaeridium, and two of the genus Baltisphaeridium are also described. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>New forms - Hystrichospheres - Upper jurassic - Dorset - England<br/>Paleontology - Dorset - England<br/>Paleontology - Classification - Dorset - England